Merge tag 'powerpc-6.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

- Enable BPF Kernel Functions (kfuncs) in the powerpc BPF JIT.

- Allow per-process DEXCR (Dynamic Execution Control Register) settings
via prctl, notably NPHIE which controls hashst/hashchk for ROP
protection.

- Install powerpc selftests in sub-directories. Note this changes the
way run_kselftest.sh needs to be invoked for powerpc selftests.

- Change fadump (Firmware Assisted Dump) to better handle memory
add/remove.

- Add support for passing additional parameters to the fadump kernel.

- Add support for updating the kdump image on CPU/memory add/remove
events.

- Other small features, cleanups and fixes.

Thanks to Andrew Donnellan, Andy Shevchenko, Aneesh Kumar K.V, Arnd
Bergmann, Benjamin Gray, Bjorn Helgaas, Christian Zigotzky, Christophe
Jaillet, Christophe Leroy, Colin Ian King, Cédric Le Goater, Dr. David
Alan Gilbert, Erhard Furtner, Frank Li, GUO Zihua, Ganesh Goudar, Geoff
Levand, Ghanshyam Agrawal, Greg Kurz, Hari Bathini, Joel Stanley, Justin
Stitt, Kunwu Chan, Li Yang, Lidong Zhong, Madhavan Srinivasan, Mahesh
Salgaonkar, Masahiro Yamada, Matthias Schiffer, Naresh Kamboju, Nathan
Chancellor, Nathan Lynch, Naveen N Rao, Nicholas Miehlbradt, Ran Wang,
Randy Dunlap, Ritesh Harjani, Sachin Sant, Shirisha Ganta, Shrikanth
Hegde, Sourabh Jain, Stephen Rothwell, sundar, Thorsten Blum, Vaibhav
Jain, Xiaowei Bao, Yang Li, and Zhao Chenhui.

* tag 'powerpc-6.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (85 commits)
powerpc/fadump: Fix section mismatch warning
powerpc/85xx: fix compile error without CONFIG_CRASH_DUMP
powerpc/fadump: update documentation about bootargs_append
powerpc/fadump: pass additional parameters when fadump is active
powerpc/fadump: setup additional parameters for dump capture kernel
powerpc/pseries/fadump: add support for multiple boot memory regions
selftests/powerpc/dexcr: Fix spelling mistake "predicition" -> "prediction"
KVM: PPC: Book3S HV nestedv2: Fix an error handling path in gs_msg_ops_kvmhv_nestedv2_config_fill_info()
KVM: PPC: Fix documentation for ppc mmu caps
KVM: PPC: code cleanup for kvmppc_book3s_irqprio_deliver
KVM: PPC: Book3S HV nestedv2: Cancel pending DEC exception
powerpc/xmon: Check cpu id in commands "c#", "dp#" and "dx#"
powerpc/code-patching: Use dedicated memory routines for patching
powerpc/code-patching: Test patch_instructions() during boot
powerpc64/kasan: Pass virtual addresses to kasan_init_phys_region()
powerpc: rename SPRN_HID2 define to SPRN_HID2_750FX
powerpc: Fix typos
powerpc/eeh: Fix spelling of the word "auxillary" and update comment
macintosh/ams: Fix unused variable warning
powerpc/Makefile: Remove bits related to the previous use of -mcmodel=large
...

Documentation/ABI/testing/sysfs-devices-system-cpu

···
 		/sys/devices/system/cpu/cpuX/cpufreq/throttle_stats/occ_reset
 Date:		March 2016
 Contact:	Linux kernel mailing list <[e-mail]>
-		Linux for PowerPC mailing list <[e-mail]>
+		Linux for PowerPC mailing list <[e-mail]>
 Description:	POWERNV CPUFreq driver's frequency throttle stats directory and
 		attributes
 
···
 		/sys/devices/system/cpu/cpufreq/policyX/throttle_stats/occ_reset
 Date:		March 2016
 Contact:	Linux kernel mailing list <[e-mail]>
-		Linux for PowerPC mailing list <[e-mail]>
+		Linux for PowerPC mailing list <[e-mail]>
 Description:	POWERNV CPUFreq driver's frequency throttle stats directory and
 		attributes
 
···
 What:		/sys/devices/system/cpu/svm
 Date:		August 2019
 Contact:	Linux kernel mailing list <[e-mail]>
-		Linux for PowerPC mailing list <[e-mail]>
+		Linux for PowerPC mailing list <[e-mail]>
 Description:	Secure Virtual Machine
 
 		If 1, it means the system is using the Protected Execution
···
 
 What:		/sys/devices/system/cpu/cpuX/purr
 Date:		Apr 2005
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	PURR ticks for this CPU since the system boot.
 
 		The Processor Utilization Resources Register (PURR) is
···
 
 What: 		/sys/devices/system/cpu/cpuX/spurr
 Date:		Dec 2006
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	SPURR ticks for this CPU since the system boot.
 
 		The Scaled Processor Utilization Resources Register
···
 
 What: 		/sys/devices/system/cpu/cpuX/idle_purr
 Date:		Apr 2020
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	PURR ticks for cpuX when it was idle.
 
 		This sysfs interface exposes the number of PURR ticks
···
 
 What: 		/sys/devices/system/cpu/cpuX/idle_spurr
 Date:		Apr 2020
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	SPURR ticks for cpuX when it was idle.
 
 		This sysfs interface exposes the number of SPURR ticks

Documentation/ABI/testing/sysfs-firmware-opal-powercap

···
 What:		/sys/firmware/opal/powercap
 Date:		August 2017
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	Powercap directory for Powernv (P8, P9) servers
 
 		Each folder in this directory contains a
···
 		/sys/firmware/opal/powercap/system-powercap/powercap-max
 		/sys/firmware/opal/powercap/system-powercap/powercap-current
 Date:		August 2017
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	System powercap directory and attributes applicable for
 		Powernv (P8, P9) servers
 

Documentation/ABI/testing/sysfs-firmware-opal-psr

···
 What:		/sys/firmware/opal/psr
 Date:		August 2017
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	Power-Shift-Ratio directory for Powernv P9 servers
 
 		Power-Shift-Ratio allows to provide hints the firmware
···
 
 What:		/sys/firmware/opal/psr/cpu_to_gpu_X
 Date:		August 2017
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	PSR sysfs attributes for Powernv P9 servers
 
 		Power-Shift-Ratio between CPU and GPU for a given chip

Documentation/ABI/testing/sysfs-firmware-opal-sensor-groups

···
 What:		/sys/firmware/opal/sensor_groups
 Date:		August 2017
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	Sensor groups directory for POWER9 powernv servers
 
 		Each folder in this directory contains a sensor group
···
 
 What:		/sys/firmware/opal/sensor_groups/<sensor_group_name>/clear
 Date:		August 2017
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	Sysfs file to clear the min-max of all the sensors
 		belonging to the group.
 

Documentation/ABI/testing/sysfs-firmware-papr-energy-scale-info

···
 What:		/sys/firmware/papr/energy_scale_info
 Date:		February 2022
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	Directory hosting a set of platform attributes like
 		energy/frequency on Linux running as a PAPR guest.
 
···
 
 What:		/sys/firmware/papr/energy_scale_info/<id>
 Date:		February 2022
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	Energy, frequency attributes directory for POWERVM servers
 
 What:		/sys/firmware/papr/energy_scale_info/<id>/desc
 Date:		February 2022
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	String description of the energy attribute of <id>
 
 What:		/sys/firmware/papr/energy_scale_info/<id>/value
 Date:		February 2022
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	Numeric value of the energy attribute of <id>
 
 What:		/sys/firmware/papr/energy_scale_info/<id>/value_desc
 Date:		February 2022
-Contact:	Linux for PowerPC mailing list <[e-mail]>
+Contact:	Linux for PowerPC mailing list <[e-mail]>
 Description:	String value of the energy attribute of <id>

Documentation/ABI/testing/sysfs-kernel-fadump

···
 Description:	read only
 		Provide information about the amount of memory reserved by
 		FADump to save the crash dump in bytes.
+
+What:		/sys/kernel/fadump/hotplug_ready
+Date:		Apr 2024
+Contact:	[e-mail]
+Description:	read only
+		Kdump udev rule re-registers fadump on memory add/remove events,
+		primarily to update the elfcorehdr. This sysfs indicates the
+		kdump udev rule that fadump re-registration is not required on
+		memory add/remove events because elfcorehdr is now prepared in
+		the second/fadump kernel.
+User:		kexec-tools
+
+What:		/sys/kernel/fadump/bootargs_append
+Date:		May 2024
+Contact:	[e-mail]
+Description:	read/write
+		This is a special sysfs file available to setup additional
+		parameters to be passed to capture kernel.

Documentation/arch/powerpc/dexcr.rst

···
 Configuration
 =============
 
-The DEXCR is currently unconfigurable. All threads are run with the
-NPHIE aspect enabled.
+prctl
+-----
+
+A process can control its own userspace DEXCR value using the
+``PR_PPC_GET_DEXCR`` and ``PR_PPC_SET_DEXCR`` pair of
+:manpage:`prctl(2)` commands. These calls have the form::
+
+    prctl(PR_PPC_GET_DEXCR, unsigned long which, 0, 0, 0);
+    prctl(PR_PPC_SET_DEXCR, unsigned long which, unsigned long ctrl, 0, 0);
+
+The possible 'which' and 'ctrl' values are as follows. Note there is no relation
+between the 'which' value and the DEXCR aspect's index.
+
+.. flat-table::
+   :header-rows: 1
+   :widths: 2 7 1
+
+   * - ``prctl()`` which
+     - Aspect name
+     - Aspect index
+
+   * - ``PR_PPC_DEXCR_SBHE``
+     - Speculative Branch Hint Enable (SBHE)
+     - 0
+
+   * - ``PR_PPC_DEXCR_IBRTPD``
+     - Indirect Branch Recurrent Target Prediction Disable (IBRTPD)
+     - 3
+
+   * - ``PR_PPC_DEXCR_SRAPD``
+     - Subroutine Return Address Prediction Disable (SRAPD)
+     - 4
+
+   * - ``PR_PPC_DEXCR_NPHIE``
+     - Non-Privileged Hash Instruction Enable (NPHIE)
+     - 5
+
+.. flat-table::
+   :header-rows: 1
+   :widths: 2 8
+
+   * - ``prctl()`` ctrl
+     - Meaning
+
+   * - ``PR_PPC_DEXCR_CTRL_EDITABLE``
+     - This aspect can be configured with PR_PPC_SET_DEXCR (get only)
+
+   * - ``PR_PPC_DEXCR_CTRL_SET``
+     - This aspect is set / set this aspect
+
+   * - ``PR_PPC_DEXCR_CTRL_CLEAR``
+     - This aspect is clear / clear this aspect
+
+   * - ``PR_PPC_DEXCR_CTRL_SET_ONEXEC``
+     - This aspect will be set after exec / set this aspect after exec
+
+   * - ``PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC``
+     - This aspect will be clear after exec / clear this aspect after exec
+
+Note that
+
+* which is a plain value, not a bitmask. Aspects must be worked with individually.
+
+* ctrl is a bitmask. ``PR_PPC_GET_DEXCR`` returns both the current and onexec
+  configuration. For example, ``PR_PPC_GET_DEXCR`` may return
+  ``PR_PPC_DEXCR_CTRL_EDITABLE | PR_PPC_DEXCR_CTRL_SET |
+  PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC``. This would indicate the aspect is currently
+  set, it will be cleared when you run exec, and you can change this with the
+  ``PR_PPC_SET_DEXCR`` prctl.
+
+* The set/clear terminology refers to setting/clearing the bit in the DEXCR.
+  For example::
+
+      prctl(PR_PPC_SET_DEXCR, PR_PPC_DEXCR_IBRTPD, PR_PPC_DEXCR_CTRL_SET, 0, 0);
+
+  will set the IBRTPD aspect bit in the DEXCR, causing indirect branch prediction
+  to be disabled.
+
+* The status returned by ``PR_PPC_GET_DEXCR`` represents what value the process
+  would like applied. It does not include any alternative overrides, such as if
+  the hypervisor is enforcing the aspect be set. To see the true DEXCR state
+  software should read the appropriate SPRs directly.
+
+* The aspect state when starting a process is copied from the parent's state on
+  :manpage:`fork(2)`. The state is reset to a fixed value on
+  :manpage:`execve(2)`. The PR_PPC_SET_DEXCR prctl() can control both of these
+  values.
+
+* The ``*_ONEXEC`` controls do not change the current process's DEXCR.
+
+Use ``PR_PPC_SET_DEXCR`` with one of ``PR_PPC_DEXCR_CTRL_SET`` or
+``PR_PPC_DEXCR_CTRL_CLEAR`` to edit a given aspect.
+
+Common error codes for both getting and setting the DEXCR are as follows:
+
+.. flat-table::
+   :header-rows: 1
+   :widths: 2 8
+
+   * - Error
+     - Meaning
+
+   * - ``EINVAL``
+     - The DEXCR is not supported by the kernel.
+
+   * - ``ENODEV``
+     - The aspect is not recognised by the kernel or not supported by the
+       hardware.
+
+``PR_PPC_SET_DEXCR`` may also report the following error codes:
+
+.. flat-table::
+   :header-rows: 1
+   :widths: 2 8
+
+   * - Error
+     - Meaning
+
+   * - ``EINVAL``
+     - The ctrl value contains unrecognised flags.
+
+   * - ``EINVAL``
+     - The ctrl value contains mutually conflicting flags (e.g.,
+       ``PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR``)
+
+   * - ``EPERM``
+     - This aspect cannot be modified with prctl() (check for the
+       PR_PPC_DEXCR_CTRL_EDITABLE flag with PR_PPC_GET_DEXCR).
+
+   * - ``EPERM``
+     - The process does not have sufficient privilege to perform the operation.
+       For example, clearing NPHIE on exec is a privileged operation (a process
+       can still clear its own NPHIE aspect without privileges).
+
+This interface allows a process to control its own DEXCR aspects, and also set
+the initial DEXCR value for any children in its process tree (up to the next
+child to use an ``*_ONEXEC`` control). This allows fine-grained control over the
+default value of the DEXCR, for example allowing containers to run with different
+default values.
 
 
 coredump and ptrace

Documentation/arch/powerpc/firmware-assisted-dump.rst

···
 memory is held.
 
 If there is no waiting dump data, then only the memory required to
-hold CPU state, HPTE region, boot memory dump, FADump header and
-elfcore header, is usually reserved at an offset greater than boot
-memory size (see Fig. 1). This area is *not* released: this region
-will be kept permanently reserved, so that it can act as a receptacle
-for a copy of the boot memory content in addition to CPU state and
-HPTE region, in the case a crash does occur.
+hold CPU state, HPTE region, boot memory dump, and FADump header is
+usually reserved at an offset greater than boot memory size (see Fig. 1).
+This area is *not* released: this region will be kept permanently
+reserved, so that it can act as a receptacle for a copy of the boot
+memory content in addition to CPU state and HPTE region, in the case
+a crash does occur.
 
 Since this reserved memory area is used only after the system crash,
 there is no point in blocking this significant chunk of memory from
···
 
   o Memory Reservation during first kernel
 
-  Low memory                                                 Top of memory
-  0    boot memory size   |<--- Reserved dump area --->|       |
-  |           |           |    Permanent Reservation   |       |
-  V           V           |                            |       V
-  +-----------+-----/ /---+---+----+-------+-----+-----+----+--+
-  |           |           |///|////|  DUMP | HDR | ELF |////|  |
-  +-----------+-----/ /---+---+----+-------+-----+-----+----+--+
-        |                   ^    ^     ^      ^           ^
-        |                   |    |     |      |           |
-        \                  CPU  HPTE   /      |           |
-         ------------------------------       |           |
-      Boot memory content gets transferred    |           |
-      to reserved area by firmware at the     |           |
-      time of crash.                          |           |
-                                          FADump Header   |
-                                           (meta area)    |
+  Low memory                                                  Top of memory
+  0    boot memory size   |<------ Reserved dump area ----->|     |
+  |           |           |      Permanent Reservation      |     |
+  V           V           |                                 |     V
+  +-----------+-----/ /---+---+----+-----------+-------+----+-----+
+  |           |           |///|////|    DUMP   |  HDR  |////|     |
+  +-----------+-----/ /---+---+----+-----------+-------+----+-----+
+        |                   ^    ^       ^         ^      ^
+        |                   |    |       |         |      |
+        \                  CPU  HPTE     /         |      |
+         --------------------------------          |      |
+      Boot memory content gets transferred         |      |
+      to reserved area by firmware at the          |      |
+      time of crash.                               |      |
+                                           FADump Header  |
+                                            (meta area)   |
                                                           |
                                                           |
                       Metadata: This area holds a metadata structure whose
···
   0      boot memory size                                      |
   |           |<------------ Crash preserved area ------------>|
   V           V           |<--- Reserved dump area --->|       |
-  +-----------+-----/ /---+---+----+-------+-----+-----+----+--+
-  |           |           |///|////|  DUMP | HDR | ELF |////|  |
-  +-----------+-----/ /---+---+----+-------+-----+-----+----+--+
-        |                                           |
-        V                                           V
-   Used by second                             /proc/vmcore
-   kernel to boot
+  +----+---+--+-----/ /---+---+----+-------+-----+-----+-------+
+  |    |ELF|  |           |///|////|  DUMP | HDR |/////|       |
+  +----+---+--+-----/ /---+---+----+-------+-----+-----+-------+
+       |   |  |                            |     |             |
+       -----  ------------------------------     ---------------
+         \              |                               |
+           \            |                               |
+             \          |                               |
+               \        |    ----------------------------
+                 \      |   /
+                   \    |  /
+                     \  | /
+                  /proc/vmcore
+
 
         +---+
         |///| -> Regions (CPU, HPTE & Metadata) marked like this in the above
         +---+    figures are not always present. For example, OPAL platform
                  does not have CPU & HPTE regions while Metadata region is
                  not supported on pSeries currently.
+
+        +---+
+        |ELF| -> elfcorehdr, it is created in second kernel after crash.
+        +---+
+
+        Note: Memory from 0 to the boot memory size is used by second kernel
 
                    Fig. 2
 
···
  - Need to come up with the better approach to find out more
    accurate boot memory size that is required for a kernel to
    boot successfully when booted with restricted memory.
- - The FADump implementation introduces a FADump crash info structure
-   in the scratch area before the ELF core header. The idea of introducing
-   this structure is to pass some important crash info data to the second
-   kernel which will help second kernel to populate ELF core header with
-   correct data before it gets exported through /proc/vmcore. The current
-   design implementation does not address a possibility of introducing
-   additional fields (in future) to this structure without affecting
-   compatibility. Need to come up with the better approach to address this.
-
-   The possible approaches are:
-
-	1. Introduce version field for version tracking, bump up the version
-	whenever a new field is added to the structure in future. The version
-	field can be used to find out what fields are valid for the current
-	version of the structure.
-	2. Reserve the area of predefined size (say PAGE_SIZE) for this
-	structure and have unused area as reserved (initialized to zero)
-	for future field additions.
-
-   The advantage of approach 1 over 2 is we don't need to reserve extra space.
 
 Author: Mahesh Salgaonkar <[e-mail]>
 

Documentation/virt/kvm/api.rst

···
 4.100 KVM_PPC_CONFIGURE_V3_MMU
 ------------------------------
 
-:Capability: KVM_CAP_PPC_RADIX_MMU or KVM_CAP_PPC_HASH_MMU_V3
+:Capability: KVM_CAP_PPC_MMU_RADIX or KVM_CAP_PPC_MMU_HASH_V3
 :Architectures: ppc
 :Type: vm ioctl
 :Parameters: struct kvm_ppc_mmuv3_cfg (in)
···
 4.101 KVM_PPC_GET_RMMU_INFO
 ---------------------------
 
-:Capability: KVM_CAP_PPC_RADIX_MMU
+:Capability: KVM_CAP_PPC_MMU_RADIX
 :Architectures: ppc
 :Type: vm ioctl
 :Parameters: struct kvm_ppc_rmmu_info (out)
···
 will disable the use of APIC hardware virtualization even if supported
 by the CPU, as it's incompatible with SynIC auto-EOI behavior.
 
-8.3 KVM_CAP_PPC_RADIX_MMU
+8.3 KVM_CAP_PPC_MMU_RADIX
 -------------------------
 
 :Architectures: ppc
···
 radix MMU defined in Power ISA V3.00 (as implemented in the POWER9
 processor).
 
-8.4 KVM_CAP_PPC_HASH_MMU_V3
+8.4 KVM_CAP_PPC_MMU_HASH_V3
 ---------------------------
 
 :Architectures: ppc

MAINTAINERS

···
 M:	Michael Ellerman <[e-mail]>
 R:	Nicholas Piggin <[e-mail]>
 R:	Christophe Leroy <[e-mail]>
-R:	Aneesh Kumar K.V <[e-mail]>
 R:	Naveen N. Rao <[e-mail]>
 L:	[e-mail]
 S:	Supported
···
 
 MMU GATHER AND TLB INVALIDATION
 M:	Will Deacon <[e-mail]>
-M:	"Aneesh Kumar K.V" <[e-mail]>
+M:	"Aneesh Kumar K.V" <[e-mail]>
 M:	Andrew Morton <[e-mail]>
 M:	Nick Piggin <[e-mail]>
 M:	Peter Zijlstra <[e-mail]>

arch/powerpc/Kbuild

···
 # SPDX-License-Identifier: GPL-2.0
-subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror -Wa,--fatal-warnings
+subdir-asflags-$(CONFIG_PPC_WERROR) := -Wa,--fatal-warnings
 
 obj-y += kernel/
 obj-y += mm/

arch/powerpc/Kconfig

···
 	depends on CRASH_DUMP
 	select RELOCATABLE if PPC64 || 44x || PPC_85xx
 
+config ARCH_SUPPORTS_CRASH_HOTPLUG
+	def_bool y
+	depends on PPC64
+
 config FA_DUMP
 	bool "Firmware-assisted dump"
 	depends on CRASH_DUMP && PPC64 && (PPC_RTAS || PPC_POWERNV)

arch/powerpc/Makefile

···
 
 ifdef CONFIG_PPC64
 ifndef CONFIG_PPC_KERNEL_PCREL
-ifeq ($(call cc-option-yn,-mcmodel=medium),y)
 	# -mcmodel=medium breaks modules because it uses 32bit offsets from
 	# the TOC pointer to create pointers where possible. Pointers into the
 	# percpu data area are created by this method.
···
 	# kernel percpu data space (starting with 0xc...). We need a full
 	# 64bit relocation for this to work, hence -mcmodel=large.
 	KBUILD_CFLAGS_MODULE += -mcmodel=large
-else
-	export NO_MINIMAL_TOC := -mno-minimal-toc
-endif
 endif
 endif
 
···
 CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mcall-aixdesc)
 endif
 endif
-CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
+CFLAGS-$(CONFIG_PPC64)	+= -mcmodel=medium
 CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mno-pointers-to-nested-functions)
 CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mlong-double-128)
 

arch/powerpc/boot/Makefile

···
 # these files into the build dir, fix up any includes and ensure that dependent
 # files are copied in the right order.
 
-# these need to be seperate variables because they are copied out of different
-# directories in the kernel tree. Sure you COULd merge them, but it's a
+# these need to be separate variables because they are copied out of different
+# directories in the kernel tree. Sure you COULD merge them, but it's a
 # cure-is-worse-than-disease situation.
 zlib-decomp-$(CONFIG_KERNEL_GZIP) := decompress_inflate.c
 zlib-$(CONFIG_KERNEL_GZIP) := inffast.c inflate.c inftrees.c

arch/powerpc/boot/decompress.c

···
  * @input_size:  length of the input buffer
  * @outbuf:      output buffer
  * @output_size: length of the output buffer
- * @skip         number of output bytes to ignore
+ * @_skip:       number of output bytes to ignore
  *
  * This function takes compressed data from inbuf, decompresses and write it to
  * outbuf. Once output_size bytes are written to the output buffer, or the

arch/powerpc/boot/dts/acadia.dts

···
 				reg = <0xef602800 0x60>;
 				interrupt-parent = <&UIC0>;
 				interrupts = <0x4 0x4>;
-				/* This thing is a bit weird.  It has it's own UIC
+				/* This thing is a bit weird.  It has its own UIC
 				 * that it uses to generate snapshot triggers.  We
 				 * don't really support this device yet, and it needs
 				 * work to figure this out.

arch/powerpc/boot/dts/fsl/b4si-post.dtsi

···
 &ifc {
 	#address-cells = <2>;
 	#size-cells = <1>;
-	compatible = "fsl,ifc", "simple-bus";
+	compatible = "fsl,ifc";
 	interrupts = <25 2 0 0>;
 };
 

arch/powerpc/boot/dts/fsl/bsc9131rdb.dts

···
 		device_type = "memory";
 	};
 
-	board_ifc: ifc: ifc@ff71e000 {
+	board_ifc: ifc: memory-controller@ff71e000 {
 		/* NAND Flash on board */
 		ranges = <0x0 0x0 0x0 0xff800000 0x00004000>;
 		reg = <0x0 0xff71e000 0x0 0x2000>;

arch/powerpc/boot/dts/fsl/bsc9131si-post.dtsi

···
 &ifc {
 	#address-cells = <2>;
 	#size-cells = <1>;
-	compatible = "fsl,ifc", "simple-bus";
+	compatible = "fsl,ifc";
 	interrupts = <16 2 0 0 20 2 0 0>;
 };
 

arch/powerpc/boot/dts/fsl/bsc9132qds.dts

···
 		device_type = "memory";
 	};
 
-	ifc: ifc@ff71e000 {
+	ifc: memory-controller@ff71e000 {
 		/* NOR, NAND Flash on board */
 		ranges = <0x0 0x0 0x0 0x88000000 0x08000000
 			  0x1 0x0 0x0 0xff800000 0x00010000>;

arch/powerpc/boot/dts/fsl/bsc9132si-post.dtsi

···
 &ifc {
 	#address-cells = <2>;
 	#size-cells = <1>;
-	compatible = "fsl,ifc", "simple-bus";
+	compatible = "fsl,ifc";
 	/* FIXME: Test whether interrupts are split */
 	interrupts = <16 2 0 0 20 2 0 0>;
 };

arch/powerpc/boot/dts/fsl/c293pcie.dts

···
 		device_type = "memory";
 	};
 
-	ifc: ifc@fffe1e000 {
+	ifc: memory-controller@fffe1e000 {
 		reg = <0xf 0xffe1e000 0 0x2000>;
 		ranges = <0x0 0x0 0xf 0xec000000 0x04000000
 			  0x1 0x0 0xf 0xff800000 0x00010000

arch/powerpc/boot/dts/fsl/c293si-post.dtsi

···
 &ifc {
 	#address-cells = <2>;
 	#size-cells = <1>;
-	compatible = "fsl,ifc", "simple-bus";
+	compatible = "fsl,ifc";
 	interrupts = <19 2 0 0>;
 };
 

arch/powerpc/boot/dts/fsl/mpc8536si-post.dtsi

···
 
 /include/ "pq3-dma-0.dtsi"
 /include/ "pq3-etsec1-0.dtsi"
+	enet0: ethernet@24000 {
+		fsl,wake-on-filer;
+		fsl,pmc-handle = <&etsec1_clk>;
+	};
 /include/ "pq3-etsec1-timer-0.dtsi"
 
 	usb@22000 {
···
 	};
 
 /include/ "pq3-etsec1-2.dtsi"
-
-	ethernet@26000 {
+	enet2: ethernet@26000 {
 		cell-index = <1>;
+		fsl,wake-on-filer;
+		fsl,pmc-handle = <&etsec3_clk>;
 	};
 
 	usb@2b000 {
···
 		compatible = "fsl,mpc8536-guts";
 		reg = <0xe0000 0x1000>;
 		fsl,has-rstcr;
+	};
+
+/include/ "pq3-power.dtsi"
+	power@e0070 {
+		compatible = "fsl,mpc8536-pmc", "fsl,mpc8548-pmc";
 	};
 };

arch/powerpc/boot/dts/fsl/mpc8544si-post.dtsi

···
 		reg = <0xe0000 0x1000>;
 		fsl,has-rstcr;
 	};
+
+/include/ "pq3-power.dtsi"
 };

arch/powerpc/boot/dts/fsl/mpc8548si-post.dtsi

···
 		reg = <0xe0000 0x1000>;
 		fsl,has-rstcr;
 	};
+
+/include/ "pq3-power.dtsi"
 };

arch/powerpc/boot/dts/fsl/mpc8572si-post.dtsi

···
 		reg = <0xe0000 0x1000>;
 		fsl,has-rstcr;
 	};
+
+/include/ "pq3-power.dtsi"
 };

arch/powerpc/boot/dts/fsl/p1010rdb-pb.dts

···
 };
 
 /include/ "p1010si-post.dtsi"
+
+&pci0 {
+	pcie@0 {
+		interrupt-map = <
+			/* IDSEL 0x0 */
+			/*
+			 *irq[4:5] are active-high
+			 *irq[6:7] are active-low
+			 */
+			0000 0x0 0x0 0x1 &mpic 0x4 0x2 0x0 0x0
+			0000 0x0 0x0 0x2 &mpic 0x5 0x2 0x0 0x0
+			0000 0x0 0x0 0x3 &mpic 0x6 0x1 0x0 0x0
+			0000 0x0 0x0 0x4 &mpic 0x7 0x1 0x0 0x0
+			>;
+	};
+};

arch/powerpc/boot/dts/fsl/p1010rdb-pb_36b.dts

···
 };
 
 /include/ "p1010si-post.dtsi"
+
+&pci0 {
+	pcie@0 {
+		interrupt-map = <
+			/* IDSEL 0x0 */
+			/*
+			 *irq[4:5] are active-high
+			 *irq[6:7] are active-low
+			 */
+			0000 0x0 0x0 0x1 &mpic 0x4 0x2 0x0 0x0
+			0000 0x0 0x0 0x2 &mpic 0x5 0x2 0x0 0x0
+			0000 0x0 0x0 0x3 &mpic 0x6 0x1 0x0 0x0
+			0000 0x0 0x0 0x4 &mpic 0x7 0x1 0x0 0x0
+			>;
+	};
+};

arch/powerpc/boot/dts/fsl/p1010rdb.dtsi

···
 		phy-connection-type = "sgmii";
 	};
 };
-
-&pci0 {
-	pcie@0 {
-		interrupt-map = <
-			/* IDSEL 0x0 */
-			/*
-			 *irq[4:5] are active-high
-			 *irq[6:7] are active-low
-			 */
-			0000 0x0 0x0 0x1 &mpic 0x4 0x2 0x0 0x0
-			0000 0x0 0x0 0x2 &mpic 0x5 0x2 0x0 0x0
-			0000 0x0 0x0 0x3 &mpic 0x6 0x1 0x0 0x0
-			0000 0x0 0x0 0x4 &mpic 0x7 0x1 0x0 0x0
-			>;
-	};
-};

arch/powerpc/boot/dts/fsl/p1010rdb_32b.dtsi

···
 	device_type = "memory";
 };
 
-board_ifc: ifc: ifc@ffe1e000 {
+board_ifc: ifc: memory-controller@ffe1e000 {
 	/* NOR, NAND Flashes and CPLD on board */
 	ranges = <0x0 0x0 0x0 0xee000000 0x02000000
 		  0x1 0x0 0x0 0xff800000 0x00010000

arch/powerpc/boot/dts/fsl/p1010rdb_36b.dtsi

···
 	device_type = "memory";
 };
 
-board_ifc: ifc: ifc@fffe1e000 {
+board_ifc: ifc: memory-controller@fffe1e000 {
 	/* NOR, NAND Flashes and CPLD on board */
 	ranges = <0x0 0x0 0xf 0xee000000 0x02000000
 		  0x1 0x0 0xf 0xff800000 0x00010000

arch/powerpc/boot/dts/fsl/p1010si-post.dtsi

···
 &ifc {
 	#address-cells = <2>;
 	#size-cells = <1>;
-	compatible = "fsl,ifc", "simple-bus";
+	compatible = "fsl,ifc";
 	interrupts = <16 2 0 0 19 2 0 0>;
 };
 
···
 /include/ "pq3-etsec2-1.dtsi"
 /include/ "pq3-etsec2-2.dtsi"
 
+	enet0: ethernet@b0000 {
+		fsl,pmc-handle = <&etsec1_clk>;
+	};
+
+	enet1: ethernet@b1000 {
+		fsl,pmc-handle = <&etsec2_clk>;
+	};
+
+	enet2: ethernet@b2000 {
+		fsl,pmc-handle = <&etsec3_clk>;
+	};
+
 	global-utilities@e0000 {
 		compatible = "fsl,p1010-guts";
 		reg = <0xe0000 0x1000>;
 		fsl,has-rstcr;
 	};
+
+/include/ "pq3-power.dtsi"
 };

arch/powerpc/boot/dts/fsl/p1020si-post.dtsi

···
 
 /include/ "pq3-etsec2-0.dtsi"
 	enet0: enet0_grp2: ethernet@b0000 {
+		fsl,pmc-handle = <&etsec1_clk>;
 	};
 
 /include/ "pq3-etsec2-1.dtsi"
 	enet1: enet1_grp2: ethernet@b1000 {
+		fsl,pmc-handle = <&etsec2_clk>;
 	};
 
 /include/ "pq3-etsec2-2.dtsi"
 	enet2: enet2_grp2: ethernet@b2000 {
+		fsl,pmc-handle = <&etsec3_clk>;
 	};
 
 	global-utilities@e0000 {
···
 		reg = <0xe0000 0x1000>;
 		fsl,has-rstcr;
 	};
+
+/include/ "pq3-power.dtsi"
 };
 
 /include/ "pq3-etsec2-grp2-0.dtsi"

arch/powerpc/boot/dts/fsl/p1021si-post.dtsi

···
 
 /include/ "pq3-etsec2-0.dtsi"
 	enet0: enet0_grp2: ethernet@b0000 {
+		fsl,pmc-handle = <&etsec1_clk>;
 	};
 
 /include/ "pq3-etsec2-1.dtsi"
 	enet1: enet1_grp2: ethernet@b1000 {
+		fsl,pmc-handle = <&etsec2_clk>;
 	};
 
 /include/ "pq3-etsec2-2.dtsi"
 	enet2: enet2_grp2: ethernet@b2000 {
+		fsl,pmc-handle = <&etsec3_clk>;
 	};
 
 	global-utilities@e0000 {
···
 		reg = <0xe0000 0x1000>;
 		fsl,has-rstcr;
 	};
+
+/include/ "pq3-power.dtsi"
 };
 
 &qe {

arch/powerpc/boot/dts/fsl/p1022si-post.dtsi

···
 /include/ "pq3-etsec2-0.dtsi"
 	enet0: enet0_grp2: ethernet@b0000 {
 		fsl,wake-on-filer;
+		fsl,pmc-handle = <&etsec1_clk>;
 	};
 
 /include/ "pq3-etsec2-1.dtsi"
 	enet1: enet1_grp2: ethernet@b1000 {
 		fsl,wake-on-filer;
+		fsl,pmc-handle = <&etsec2_clk>;
 	};
 
 	global-utilities@e0000 {
···
 		fsl,has-rstcr;
 	};
 
+/include/ "pq3-power.dtsi"
 	power@e0070 {
-		compatible = "fsl,mpc8536-pmc", "fsl,mpc8548-pmc";
-		reg = <0xe0070 0x20>;
+		compatible = "fsl,p1022-pmc", "fsl,mpc8536-pmc",
+				"fsl,mpc8548-pmc";
 	};
 
 };

arch/powerpc/boot/dts/fsl/p2020si-post.dtsi

···
 		compatible = "fsl-usb2-dr-v1.6", "fsl-usb2-dr";
 	};
 /include/ "pq3-etsec1-0.dtsi"
+	enet0: ethernet@24000 {
+		fsl,pmc-handle = <&etsec1_clk>;
+
+	};
 /include/ "pq3-etsec1-timer-0.dtsi"
 
 	ptp_clock@24e00 {
···
 
 
 /include/ "pq3-etsec1-1.dtsi"
+	enet1: ethernet@25000 {
+		fsl,pmc-handle = <&etsec2_clk>;
+	};
+
 /include/ "pq3-etsec1-2.dtsi"
+	enet2: ethernet@26000 {
+		fsl,pmc-handle = <&etsec3_clk>;
+	};
+
 /include/ "pq3-esdhc-0.dtsi"
 	sdhc@2e000 {
 		compatible = "fsl,p2020-esdhc", "fsl,esdhc";
···
 		fsl,has-rstcr;
 	};
 
-	pmc: power@e0070 {
-		compatible = "fsl,mpc8548-pmc";
-		reg = <0xe0070 0x20>;
-	};
+/include/ "pq3-power.dtsi"
 };

arch/powerpc/boot/dts/fsl/pq3-power.dtsi

···
+// SPDX-License-Identifier: (GPL-2.0+)
+/*
+ * Copyright 2024 NXP
+ */
+
+power@e0070 {
+	compatible = "fsl,mpc8548-pmc";
+	reg = <0xe0070 0x20>;
+
+	etsec1_clk: soc-clk@24 {
+		fsl,pmcdr-mask = <0x00000080>;
+	};
+	etsec2_clk: soc-clk@25 {
+		fsl,pmcdr-mask = <0x00000040>;
+	};
+	etsec3_clk: soc-clk@26 {
+		fsl,pmcdr-mask = <0x00000020>;
+	};
+};

arch/powerpc/boot/dts/fsl/t1023si-post.dtsi

···
 &ifc {
 	#address-cells = <2>;
 	#size-cells = <1>;
-	compatible = "fsl,ifc", "simple-bus";
+	compatible = "fsl,ifc";
 	interrupts = <25 2 0 0>;
 };
 

arch/powerpc/boot/dts/fsl/t1024rdb.dts

···
 		board-control@2,0 {
 			#address-cells = <1>;
 			#size-cells = <1>;
-			compatible = "fsl,t1024-cpld";
+			compatible = "fsl,t1024-cpld", "fsl,deepsleep-cpld";
 			reg = <3 0 0x300>;
 			ranges = <0 3 0 0x300>;
 			bank-width = <1>;

arch/powerpc/boot/dts/fsl/t1040rdb.dts

···
 
 	ifc: localbus@ffe124000 {
 		cpld@3,0 {
-			compatible = "fsl,t1040rdb-cpld";
+			compatible = "fsl,t104xrdb-cpld", "fsl,deepsleep-cpld";
 		};
 	};
 };

arch/powerpc/boot/dts/fsl/t1040si-post.dtsi

···
 &ifc {
 	#address-cells = <2>;
 	#size-cells = <1>;
-	compatible = "fsl,ifc", "simple-bus";
+	compatible = "fsl,ifc";
 	interrupts = <25 2 0 0>;
 };
 

arch/powerpc/boot/dts/fsl/t1042rdb.dts

···
 
 	ifc: localbus@ffe124000 {
 		cpld@3,0 {
-			compatible = "fsl,t1042rdb-cpld";
+			compatible = "fsl,t104xrdb-cpld", "fsl,deepsleep-cpld";
 		};
 	};
 };

arch/powerpc/boot/dts/fsl/t1042rdb_pi.dts

···
 
 	ifc: localbus@ffe124000 {
 		cpld@3,0 {
-			compatible = "fsl,t1042rdb_pi-cpld";
+			compatible = "fsl,t104xrdb-cpld", "fsl,deepsleep-cpld";
 		};
 	};
 

arch/powerpc/boot/dts/fsl/t2081si-post.dtsi

···
 &ifc {
 	#address-cells = <2>;
 	#size-cells = <1>;
-	compatible = "fsl,ifc", "simple-bus";
+	compatible = "fsl,ifc";
 	interrupts = <25 2 0 0>;
 };
 

arch/powerpc/boot/dts/fsl/t4240si-post.dtsi

···
 &ifc {
 	#address-cells = <2>;
 	#size-cells = <1>;
-	compatible = "fsl,ifc", "simple-bus";
+	compatible = "fsl,ifc";
 	interrupts = <25 2 0 0>;
 };
 

arch/powerpc/boot/main.c

···
 
 /* A buffer that may be edited by tools operating on a zImage binary so as to
  * edit the command line passed to vmlinux (by setting /chosen/bootargs).
- * The buffer is put in it's own section so that tools may locate it easier.
+ * The buffer is put in its own section so that tools may locate it easier.
  */
 static char cmdline[BOOT_COMMAND_LINE_SIZE]
 	__attribute__((__section__("__builtin_cmdline")));

arch/powerpc/boot/ps3.c

···
 
 /* A buffer that may be edited by tools operating on a zImage binary so as to
  * edit the command line passed to vmlinux (by setting /chosen/bootargs).
- * The buffer is put in it's own section so that tools may locate it easier.
+ * The buffer is put in its own section so that tools may locate it easier.
  */
 
 static char cmdline[BOOT_COMMAND_LINE_SIZE]

arch/powerpc/include/asm/cpu_has_feature.h

···
 #endif
 
 #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG
-	if (!static_key_initialized) {
+	if (!static_key_feature_checks_initialized) {
 		printk("Warning! cpu_has_feature() used prior to jump label init!\n");
 		dump_stack();
 		return early_cpu_has_feature(feature);

arch/powerpc/include/asm/eeh.h

···
 	int false_positives;		/* Times of reported #ff's	*/
 	atomic_t pass_dev_cnt;		/* Count of passed through devs	*/
 	struct eeh_pe *parent;		/* Parent PE			*/
-	void *data;			/* PE auxillary data		*/
+	void *data;			/* PE auxiliary data		*/
 	struct list_head child_list;	/* List of PEs below this PE	*/
 	struct list_head child;		/* Memb. child_list/eeh_phb_pe	*/
 	struct list_head edevs;		/* List of eeh_dev in this PE	*/

arch/powerpc/include/asm/fadump-internal.h

···
 
 #define FADUMP_CPU_UNKNOWN		(~((u32)0))
 
-#define FADUMP_CRASH_INFO_MAGIC		fadump_str_to_u64("FADMPINF")
+/*
+ * The introduction of new fields in the fadump crash info header has
+ * led to a change in the magic key from `FADMPINF` to `FADMPSIG` for
+ * identifying a kernel crash from an old kernel.
+ *
+ * To prevent the need for further changes to the magic number in the
+ * event of future modifications to the fadump crash info header, a
+ * version field has been introduced to track the fadump crash info
+ * header version.
+ *
+ * Consider a few points before adding new members to the fadump crash info
+ * header structure:
+ *
+ *  - Append new members; avoid adding them in between.
+ *  - Non-primitive members should have a size member as well.
+ *  - For every change in the fadump header, increment the
+ *    fadump header version. This helps the updated kernel decide how to
+ *    handle kernel dumps from older kernels.
+ */
+#define FADUMP_CRASH_INFO_MAGIC_OLD	fadump_str_to_u64("FADMPINF")
+#define FADUMP_CRASH_INFO_MAGIC		fadump_str_to_u64("FADMPSIG")
+#define FADUMP_HEADER_VERSION		1
 
 /* fadump crash info structure */
 struct fadump_crash_info_header {
 	u64		magic_number;
-	u64		elfcorehdr_addr;
+	u32		version;
 	u32		crashing_cpu;
+	u64		vmcoreinfo_raddr;
+	u64		vmcoreinfo_size;
+	u32		pt_regs_sz;
+	u32		cpu_mask_sz;
 	struct pt_regs	regs;
 	struct cpumask	cpu_mask;
 };
···
 	u64		boot_mem_regs_cnt;
 
 	unsigned long	fadumphdr_addr;
+	u64		elfcorehdr_addr;
+	u64		elfcorehdr_size;
 	unsigned long	cpu_notes_buf_vaddr;
 	unsigned long	cpu_notes_buf_size;
+
+	unsigned long	param_area;
 
 	/*
 	 * Maximum size supported by firmware to copy from source to
···
 	unsigned long	dump_active:1;
 	unsigned long	dump_registered:1;
 	unsigned long	nocma:1;
+	unsigned long	param_area_supported:1;
 
 	struct fadump_ops	*ops;
 };
···
 				      struct seq_file *m);
 	void	(*fadump_trigger)(struct fadump_crash_info_header *fdh,
 				  const char *msg);
+	int	(*fadump_max_boot_mem_rgns)(void);
 };
 
 /* Helper functions */
···
 void fadump_free_cpu_notes_buf(void);
 u32 *__init fadump_regs_to_elf_notes(u32 *buf, struct pt_regs *regs);
 void __init fadump_update_elfcore_header(char *bufp);
-bool is_fadump_boot_mem_contiguous(void);
 bool is_fadump_reserved_mem_contiguous(void);
 
 #else /* !CONFIG_PRESERVE_FA_DUMP */

arch/powerpc/include/asm/fadump.h

···
 extern int should_fadump_crash(void);
 extern void crash_fadump(struct pt_regs *, const char *);
 extern void fadump_cleanup(void);
+extern void fadump_append_bootargs(void);
 
 #else	/* CONFIG_FA_DUMP */
 static inline int is_fadump_active(void) { return 0; }
 static inline int should_fadump_crash(void) { return 0; }
 static inline void crash_fadump(struct pt_regs *regs, const char *str) { }
 static inline void fadump_cleanup(void) { }
+static inline void fadump_append_bootargs(void) { }
 #endif /* !CONFIG_FA_DUMP */
 
 #if defined(CONFIG_FA_DUMP) || defined(CONFIG_PRESERVE_FA_DUMP)

arch/powerpc/include/asm/feature-fixups.h

···
 extern long __start___barrier_nospec_fixup, __stop___barrier_nospec_fixup;
 extern long __start__btb_flush_fixup, __stop__btb_flush_fixup;
 
+extern bool static_key_feature_checks_initialized;
+
 void apply_feature_fixups(void);
 void update_mmu_feature_fixups(unsigned long mask);
 void setup_feature_keys(void);

arch/powerpc/include/asm/hvcall.h

···
  * Used for all but the craziest of phyp interfaces (see plpar_hcall9)
  */
 #define PLPAR_HCALL_BUFSIZE 4
-long plpar_hcall(unsigned long opcode, unsigned long *retbuf, ...);
+long plpar_hcall(unsigned long opcode, unsigned long retbuf[static PLPAR_HCALL_BUFSIZE], ...);
 
 /**
  * plpar_hcall_raw: - Make a hypervisor call without calculating hcall stats
···
  * plpar_hcall, but plpar_hcall_raw works in real mode and does not
  * calculate hypervisor call statistics.
  */
-long plpar_hcall_raw(unsigned long opcode, unsigned long *retbuf, ...);
+long plpar_hcall_raw(unsigned long opcode, unsigned long retbuf[static PLPAR_HCALL_BUFSIZE], ...);
 
 /**
  * plpar_hcall9: - Make a pseries hypervisor call with up to 9 return arguments
···
  * PLPAR_HCALL9_BUFSIZE to size the return argument buffer.
  */
 #define PLPAR_HCALL9_BUFSIZE 9
-long plpar_hcall9(unsigned long opcode, unsigned long *retbuf, ...);
-long plpar_hcall9_raw(unsigned long opcode, unsigned long *retbuf, ...);
+long plpar_hcall9(unsigned long opcode, unsigned long retbuf[static PLPAR_HCALL9_BUFSIZE], ...);
+long plpar_hcall9_raw(unsigned long opcode, unsigned long retbuf[static PLPAR_HCALL9_BUFSIZE], ...);
 
 /* pseries hcall tracing */
 extern struct static_key hcall_tracepoint_key;
···
 	unsigned long backing_mem;
 };
 
-int h_get_mpp(struct hvcall_mpp_data *);
+long h_get_mpp(struct hvcall_mpp_data *mpp_data);
 
 struct hvcall_mpp_x_data {
 	unsigned long coalesced_bytes;

arch/powerpc/include/asm/interrupt.h

···
 	if (IS_ENABLED(CONFIG_KASAN))
 		return;
 
+	/*
+	 * Likewise, do not use it in real mode if percpu first chunk is not
+	 * embedded. With CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK enabled there
+	 * are chances where percpu allocation can come from vmalloc area.
+	 */
+	if (percpu_first_chunk_is_paged)
+		return;
+
 	/* Otherwise, it should be safe to call it */
 	nmi_enter();
 }
···
 		// no nmi_exit for a pseries hash guest taking a real mode exception
 	} else if (IS_ENABLED(CONFIG_KASAN)) {
 		// no nmi_exit for KASAN in real mode
+	} else if (percpu_first_chunk_is_paged) {
+		// no nmi_exit if percpu first chunk is not embedded
 	} else {
 		nmi_exit();
 	}

arch/powerpc/include/asm/io.h

···
  * define properly based on the platform
  */
 #ifndef CONFIG_PCI
-#define _IO_BASE	0
+#define _IO_BASE	POISON_POINTER_DELTA
 #define _ISA_MEM_BASE	0
 #define PCI_DRAM_OFFSET 0
 #elif defined(CONFIG_PPC32)
···
 #define __do_inw(port)		_rec_inw(port)
 #define __do_inl(port)		_rec_inl(port)
 #else /* CONFIG_PPC32 */
-#define __do_outb(val, port)	writeb(val,(PCI_IO_ADDR)_IO_BASE+port);
-#define __do_outw(val, port)	writew(val,(PCI_IO_ADDR)_IO_BASE+port);
-#define __do_outl(val, port)	writel(val,(PCI_IO_ADDR)_IO_BASE+port);
-#define __do_inb(port)		readb((PCI_IO_ADDR)_IO_BASE + port);
-#define __do_inw(port)		readw((PCI_IO_ADDR)_IO_BASE + port);
-#define __do_inl(port)		readl((PCI_IO_ADDR)_IO_BASE + port);
+#define __do_outb(val, port)	writeb(val,(PCI_IO_ADDR)(_IO_BASE+port));
+#define __do_outw(val, port)	writew(val,(PCI_IO_ADDR)(_IO_BASE+port));
+#define __do_outl(val, port)	writel(val,(PCI_IO_ADDR)(_IO_BASE+port));
+#define __do_inb(port)		readb((PCI_IO_ADDR)(_IO_BASE + port));
+#define __do_inw(port)		readw((PCI_IO_ADDR)(_IO_BASE + port));
+#define __do_inl(port)		readl((PCI_IO_ADDR)(_IO_BASE + port));
 #endif /* !CONFIG_PPC32 */
 
 #ifdef CONFIG_EEH
···
 #define __do_writesw(a, b, n)	_outsw(PCI_FIX_ADDR(a),(b),(n))
 #define __do_writesl(a, b, n)	_outsl(PCI_FIX_ADDR(a),(b),(n))
 
-#define __do_insb(p, b, n)	readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
-#define __do_insw(p, b, n)	readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
-#define __do_insl(p, b, n)	readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
-#define __do_outsb(p, b, n)	writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
-#define __do_outsw(p, b, n)	writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
-#define __do_outsl(p, b, n)	writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
+#define __do_insb(p, b, n)	readsb((PCI_IO_ADDR)(_IO_BASE+(p)), (b), (n))
+#define __do_insw(p, b, n)	readsw((PCI_IO_ADDR)(_IO_BASE+(p)), (b), (n))
+#define __do_insl(p, b, n)	readsl((PCI_IO_ADDR)(_IO_BASE+(p)), (b), (n))
+#define __do_outsb(p, b, n)	writesb((PCI_IO_ADDR)(_IO_BASE+(p)),(b),(n))
+#define __do_outsw(p, b, n)	writesw((PCI_IO_ADDR)(_IO_BASE+(p)),(b),(n))
+#define __do_outsl(p, b, n)	writesl((PCI_IO_ADDR)(_IO_BASE+(p)),(b),(n))
 
 #define __do_memset_io(addr, c, n)	\
 				_memset_io(PCI_FIX_ADDR(addr), c, n)
···
 }
 
 /*
- * 32 bits still uses virt_to_bus() for it's implementation of DMA
+ * 32 bits still uses virt_to_bus() for its implementation of DMA
  * mappings se we have to keep it defined here. We also have some old
  * drivers (shame shame shame) that use bus_to_virt() and haven't been
  * fixed yet so I need to define it here.

arch/powerpc/include/asm/kexec.h

···
 		ppc_save_regs(newregs);
 }
 
+#ifdef CONFIG_CRASH_HOTPLUG
+void arch_crash_handle_hotplug_event(struct kimage *image, void *arg);
+#define arch_crash_handle_hotplug_event arch_crash_handle_hotplug_event
+
+int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags);
+#define arch_crash_hotplug_support arch_crash_hotplug_support
+
+unsigned int arch_crash_get_elfcorehdr_size(void);
+#define crash_get_elfcorehdr_size arch_crash_get_elfcorehdr_size
+#endif /* CONFIG_CRASH_HOTPLUG */
+
 extern int crashing_cpu;
 extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
 extern void crash_ipi_callback(struct pt_regs *regs);
···
 }
 
 #endif /* CONFIG_CRASH_DUMP */
+
+#if defined(CONFIG_KEXEC_FILE) || defined(CONFIG_CRASH_DUMP)
+int update_cpus_node(void *fdt);
+#endif
 
 #ifdef CONFIG_PPC_BOOK3S_64
 #include <asm/book3s/64/kexec.h>

arch/powerpc/include/asm/kexec_ranges.h

···
 void sort_memory_ranges(struct crash_mem *mrngs, bool merge);
 struct crash_mem *realloc_mem_ranges(struct crash_mem **mem_ranges);
 int add_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size);
-int add_tce_mem_ranges(struct crash_mem **mem_ranges);
-int add_initrd_mem_range(struct crash_mem **mem_ranges);
-#ifdef CONFIG_PPC_64S_HASH_MMU
-int add_htab_mem_range(struct crash_mem **mem_ranges);
-#else
-static inline int add_htab_mem_range(struct crash_mem **mem_ranges)
-{
-	return 0;
-}
-#endif
-int add_kernel_mem_range(struct crash_mem **mem_ranges);
-int add_rtas_mem_range(struct crash_mem **mem_ranges);
-int add_opal_mem_range(struct crash_mem **mem_ranges);
-int add_reserved_mem_ranges(struct crash_mem **mem_ranges);
-
+int remove_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size);
+int get_exclude_memory_ranges(struct crash_mem **mem_ranges);
+int get_reserved_memory_ranges(struct crash_mem **mem_ranges);
+int get_crash_memory_ranges(struct crash_mem **mem_ranges);
+int get_usable_memory_ranges(struct crash_mem **mem_ranges);
 #endif /* _ASM_POWERPC_KEXEC_RANGES_H */

arch/powerpc/include/asm/mmu.h

···
 #endif
 
 #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG
-	if (!static_key_initialized) {
+	if (!static_key_feature_checks_initialized) {
 		printk("Warning! mmu_has_feature() used prior to jump label init!\n");
 		dump_stack();
 		return early_mmu_has_feature(feature);

arch/powerpc/include/asm/module.h

···
 	unsigned long tramp;
 	unsigned long tramp_regs;
 #endif
-
-	/* List of BUG addresses, source line numbers and filenames */
-	struct list_head bug_list;
-	struct bug_entry *bug_table;
-	unsigned int num_bugs;
 };
 
 /*

arch/powerpc/include/asm/opal-api.h

···
  * The host will pass on OPAL, a buffer of length OPAL_SYSEPOW_MAX
  * with individual elements being 16 bits wide to fetch the system
  * wide EPOW status. Each element in the buffer will contain the
- * EPOW status in it's bit representation for a particular EPOW sub
+ * EPOW status in its bit representation for a particular EPOW sub
  * class as defined here. So multiple detailed EPOW status bits
  * specific for any sub class can be represented in a single buffer
- * element as it's bit representation.
+ * element as its bit representation.
  */
 
 /* System EPOW type */

arch/powerpc/include/asm/percpu.h

···
 #endif /* CONFIG_SMP */
 #endif /* __powerpc64__ */
 
+#if defined(CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK) && defined(CONFIG_SMP)
+#include <linux/jump_label.h>
+DECLARE_STATIC_KEY_FALSE(__percpu_first_chunk_is_paged);
+
+#define percpu_first_chunk_is_paged	\
+		(static_key_enabled(&__percpu_first_chunk_is_paged.key))
+#else
+#define percpu_first_chunk_is_paged	false
+#endif /* CONFIG_PPC64 && CONFIG_SMP */
+
 #include <asm-generic/percpu.h>
 
 #include <asm/paca.h>

arch/powerpc/include/asm/pmac_feature.h

···
 
 /* PMAC_FTR_BMAC_ENABLE		(struct device_node* node, 0, int value)
  * enable/disable the bmac (ethernet) cell of a mac-io ASIC, also drive
- * it's reset line
+ * its reset line
  */
 #define PMAC_FTR_BMAC_ENABLE		PMAC_FTR_DEF(6)
 

arch/powerpc/include/asm/ppc-opcode.h

···
 #define PPC_RAW_STB(r, base, i)		(0x98000000 | ___PPC_RS(r) | ___PPC_RA(base) | IMM_L(i))
 #define PPC_RAW_LBZ(r, base, i)		(0x88000000 | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
 #define PPC_RAW_LDX(r, base, b)		(0x7c00002a | ___PPC_RT(r) | ___PPC_RA(base) | ___PPC_RB(b))
+#define PPC_RAW_LHA(r, base, i)		(0xa8000000 | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
 #define PPC_RAW_LHZ(r, base, i)		(0xa0000000 | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
 #define PPC_RAW_LHBRX(r, base, b)	(0x7c00062c | ___PPC_RT(r) | ___PPC_RA(base) | ___PPC_RB(b))
 #define PPC_RAW_LWBRX(r, base, b)	(0x7c00042c | ___PPC_RT(r) | ___PPC_RA(base) | ___PPC_RB(b))
···
 #define PPC_RAW_MULW(d, a, b)		(0x7c0001d6 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_MULHWU(d, a, b)		(0x7c000016 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_MULI(d, a, i)		(0x1c000000 | ___PPC_RT(d) | ___PPC_RA(a) | IMM_L(i))
+#define PPC_RAW_DIVW(d, a, b)		(0x7c0003d6 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_DIVWU(d, a, b)		(0x7c000396 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_DIVDU(d, a, b)		(0x7c000392 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_DIVDE(t, a, b)		(0x7c000352 | ___PPC_RT(t) | ___PPC_RA(a) | ___PPC_RB(b))
···
 #define PPC_RAW_XOR(d, a, b)		(0x7c000278 | ___PPC_RA(d) | ___PPC_RS(a) | ___PPC_RB(b))
 #define PPC_RAW_XORI(d, a, i)		(0x68000000 | ___PPC_RA(d) | ___PPC_RS(a) | IMM_L(i))
 #define PPC_RAW_XORIS(d, a, i)		(0x6c000000 | ___PPC_RA(d) | ___PPC_RS(a) | IMM_L(i))
+#define PPC_RAW_EXTSB(d, a)		(0x7c000774 | ___PPC_RA(d) | ___PPC_RS(a))
+#define PPC_RAW_EXTSH(d, a)		(0x7c000734 | ___PPC_RA(d) | ___PPC_RS(a))
 #define PPC_RAW_EXTSW(d, a)		(0x7c0007b4 | ___PPC_RA(d) | ___PPC_RS(a))
 #define PPC_RAW_SLW(d, a, s)		(0x7c000030 | ___PPC_RA(d) | ___PPC_RS(a) | ___PPC_RB(s))
 #define PPC_RAW_SLD(d, a, s)		(0x7c000036 | ___PPC_RA(d) | ___PPC_RS(a) | ___PPC_RB(s))

arch/powerpc/include/asm/processor.h

···
 	unsigned long   sier2;
 	unsigned long   sier3;
 	unsigned long	hashkeyr;
-
+	unsigned long	dexcr;
+	unsigned long	dexcr_onexec;	/* Reset value to load on exec */
 #endif
 };
 
···
 
 extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr);
 extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val);
+
+#ifdef CONFIG_PPC_BOOK3S_64
+
+#define PPC_GET_DEXCR_ASPECT(tsk, asp) get_dexcr_prctl((tsk), (asp))
+#define PPC_SET_DEXCR_ASPECT(tsk, asp, val) set_dexcr_prctl((tsk), (asp), (val))
+
+int get_dexcr_prctl(struct task_struct *tsk, unsigned long asp);
+int set_dexcr_prctl(struct task_struct *tsk, unsigned long asp, unsigned long val);
+
+#endif
 
 extern void load_fp_state(struct thread_fp_state *fp);
 extern void store_fp_state(struct thread_fp_state *fp);

arch/powerpc/include/asm/reg.h

···
 #define HID1_ABE	(1<<10)		/* 7450 Address Broadcast Enable */
 #define HID1_PS		(1<<16)		/* 750FX PLL selection */
 #endif
-#define SPRN_HID2	0x3F8		/* Hardware Implementation Register 2 */
+#define SPRN_HID2_750FX	0x3F8		/* IBM 750FX HID2 Register */
 #define SPRN_HID2_GEKKO	0x398		/* Gekko HID2 Register */
 #define SPRN_HID2_G2_LE	0x3F3		/* G2_LE HID2 Register */
 #define  HID2_G2_LE_HBE	(1<<18)		/* High BAT Enable (G2_LE) */

arch/powerpc/include/asm/uninorth.h

···
 #define UNI_N_HWINIT_STATE_SLEEPING	0x01
 #define UNI_N_HWINIT_STATE_RUNNING	0x02
 /* This last bit appear to be used by the bootROM to know the second
- * CPU has started and will enter it's sleep loop with IP=0
+ * CPU has started and will enter its sleep loop with IP=0
  */
 #define UNI_N_HWINIT_STATE_CPU1_FLAG	0x10000000
 

arch/powerpc/include/uapi/asm/bootx.h

···
     /* ALL BELOW NEW (vers. 4) */
 
     /* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag
-       (non-PCI) only. On PCI, memory is contiguous and it's size is in the
+       (non-PCI) only. On PCI, memory is contiguous and its size is in the
        device-tree. */
     boot_info_map_entry_t
     	        physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */

arch/powerpc/kernel/Makefile

···
 # Makefile for the linux kernel.
 #
 
-ifdef CONFIG_PPC64
-CFLAGS_prom_init.o	+= $(NO_MINIMAL_TOC)
-endif
 ifdef CONFIG_PPC32
 CFLAGS_prom_init.o      += -fPIC
 CFLAGS_btext.o		+= -fPIC
···
 obj-$(CONFIG_PPC_DAWR)		+= dawr.o
 obj-$(CONFIG_PPC_BOOK3S_64)	+= cpu_setup_ppc970.o cpu_setup_pa6t.o
 obj-$(CONFIG_PPC_BOOK3S_64)	+= cpu_setup_power.o
+obj-$(CONFIG_PPC_BOOK3S_64)	+= dexcr.o
 obj-$(CONFIG_PPC_BOOK3S_64)	+= mce.o mce_power.o
 obj-$(CONFIG_PPC_BOOK3E_64)	+= exceptions-64e.o idle_64e.o
 obj-$(CONFIG_PPC_BARRIER_NOSPEC) += security.o
···
 KCOV_INSTRUMENT_kprobes-ftrace.o := n
 KCSAN_SANITIZE_kprobes-ftrace.o := n
 UBSAN_SANITIZE_kprobes-ftrace.o := n
-GCOV_PROFILE_syscall_64.o := n
-KCOV_INSTRUMENT_syscall_64.o := n
-UBSAN_SANITIZE_syscall_64.o := n
 UBSAN_SANITIZE_vdso.o := n
 
 # Necessary for booting with kcov enabled on book3e machines

arch/powerpc/kernel/cpu_setup_6xx.S

···
 	andi.	r3,r3,0xff00
 	cmpwi	cr0,r3,0x0200
 	bne	1f
-	mfspr	r4,SPRN_HID2
+	mfspr	r4,SPRN_HID2_750FX
 	stw	r4,CS_HID2(r5)
 1:
 	mtcr	r7
···
 	bne	4f
 	lwz	r4,CS_HID2(r5)
 	rlwinm	r4,r4,0,19,17
-	mtspr	SPRN_HID2,r4
+	mtspr	SPRN_HID2_750FX,r4
 	sync
 4:
 	lwz	r4,CS_HID1(r5)

arch/powerpc/kernel/dexcr.c

···
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/capability.h>
+#include <linux/cpu.h>
+#include <linux/init.h>
+#include <linux/prctl.h>
+#include <linux/sched.h>
+
+#include <asm/cpu_has_feature.h>
+#include <asm/cputable.h>
+#include <asm/processor.h>
+#include <asm/reg.h>
+
+static int __init init_task_dexcr(void)
+{
+	if (!early_cpu_has_feature(CPU_FTR_ARCH_31))
+		return 0;
+
+	current->thread.dexcr_onexec = mfspr(SPRN_DEXCR);
+
+	return 0;
+}
+early_initcall(init_task_dexcr)
+
+/* Allow thread local configuration of these by default */
+#define DEXCR_PRCTL_EDITABLE ( \
+	DEXCR_PR_IBRTPD | \
+	DEXCR_PR_SRAPD | \
+	DEXCR_PR_NPHIE)
+
+static int prctl_to_aspect(unsigned long which, unsigned int *aspect)
+{
+	switch (which) {
+	case PR_PPC_DEXCR_SBHE:
+		*aspect = DEXCR_PR_SBHE;
+		break;
+	case PR_PPC_DEXCR_IBRTPD:
+		*aspect = DEXCR_PR_IBRTPD;
+		break;
+	case PR_PPC_DEXCR_SRAPD:
+		*aspect = DEXCR_PR_SRAPD;
+		break;
+	case PR_PPC_DEXCR_NPHIE:
+		*aspect = DEXCR_PR_NPHIE;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+int get_dexcr_prctl(struct task_struct *task, unsigned long which)
+{
+	unsigned int aspect;
+	int ret;
+
+	ret = prctl_to_aspect(which, &aspect);
+	if (ret)
+		return ret;
+
+	if (aspect & DEXCR_PRCTL_EDITABLE)
+		ret |= PR_PPC_DEXCR_CTRL_EDITABLE;
+
+	if (aspect & mfspr(SPRN_DEXCR))
+		ret |= PR_PPC_DEXCR_CTRL_SET;
+	else
+		ret |= PR_PPC_DEXCR_CTRL_CLEAR;
+
+	if (aspect & task->thread.dexcr_onexec)
+		ret |= PR_PPC_DEXCR_CTRL_SET_ONEXEC;
+	else
+		ret |= PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC;
+
+	return ret;
+}
+
+int set_dexcr_prctl(struct task_struct *task, unsigned long which, unsigned long ctrl)
+{
+	unsigned long dexcr;
+	unsigned int aspect;
+	int err = 0;
+
+	err = prctl_to_aspect(which, &aspect);
+	if (err)
+		return err;
+
+	if (!(aspect & DEXCR_PRCTL_EDITABLE))
+		return -EPERM;
+
+	if (ctrl & ~PR_PPC_DEXCR_CTRL_MASK)
+		return -EINVAL;
+
+	if (ctrl & PR_PPC_DEXCR_CTRL_SET && ctrl & PR_PPC_DEXCR_CTRL_CLEAR)
+		return -EINVAL;
+
+	if (ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC && ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC)
+		return -EINVAL;
+
+	/*
+	 * We do not want an unprivileged process being able to disable
+	 * a setuid process's hash check instructions
+	 */
+	if (aspect == DEXCR_PR_NPHIE &&
+	    ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC &&
+	    !capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	dexcr = mfspr(SPRN_DEXCR);
+
+	if (ctrl & PR_PPC_DEXCR_CTRL_SET)
+		dexcr |= aspect;
+	else if (ctrl & PR_PPC_DEXCR_CTRL_CLEAR)
+		dexcr &= ~aspect;
+
+	if (ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC)
+		task->thread.dexcr_onexec |= aspect;
+	else if (ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC)
+		task->thread.dexcr_onexec &= ~aspect;
+
+	mtspr(SPRN_DEXCR, dexcr);
+
+	return 0;
+}

arch/powerpc/kernel/eeh.c

···
 	 * We will punt with the following conditions: Failure to get
 	 * PE's state, EEH not support and Permanently unavailable
 	 * state, PE is in good state.
+	 *
+	 * On the pSeries, after reaching the threshold, get_state might
+	 * return EEH_STATE_NOT_SUPPORT. However, it's possible that the
+	 * device state remains uncleared if the device is not marked
+	 * pci_channel_io_perm_failure. Therefore, consider logging the
+	 * event to let device removal happen.
+	 *
 	 */
 	if ((ret < 0) ||
-	    (ret == EEH_STATE_NOT_SUPPORT) || eeh_state_active(ret)) {
+	    (ret == EEH_STATE_NOT_SUPPORT &&
+	     dev->error_state == pci_channel_io_perm_failure) ||
+	    eeh_state_active(ret)) {
 		eeh_stats.false_positives++;
 		pe->false_positives++;
 		rc = 0;

arch/powerpc/kernel/eeh_driver.c

···
 				devices++;
 
 	if (!devices) {
-		pr_debug("EEH: Frozen PHB#%x-PE#%x is empty!\n",
+		pr_warn("EEH: Frozen PHB#%x-PE#%x is empty!\n",
 			pe->phb->global_number, pe->addr);
-		goto out; /* nothing to recover */
+		/*
+		 * The device is removed, tear down its state, on powernv
+		 * hotplug driver would take care of it but not on pseries,
+		 * permanently disable the card as it is hot removed.
+		 *
+		 * In the case of powernv, note that the removal of device
+		 * is covered by pci rescan lock, so no problem even if hotplug
+		 * driver attempts to remove the device.
+		 */
+		goto recover_failed;
 	}
 
 	/* Log the event */

arch/powerpc/kernel/eeh_pe.c

···
 static LIST_HEAD(eeh_phb_pe);
 
 /**
- * eeh_set_pe_aux_size - Set PE auxillary data size
- * @size: PE auxillary data size
+ * eeh_set_pe_aux_size - Set PE auxiliary data size
+ * @size: PE auxiliary data size in bytes
  *
- * Set PE auxillary data size
+ * Set PE auxiliary data size.
  */
 void eeh_set_pe_aux_size(int size)
 {
···
  * eeh_pe_mark_isolated
  * @pe: EEH PE
  *
- * Record that a PE has been isolated by marking the PE and it's children as
+ * Record that a PE has been isolated by marking the PE and its children as
  * EEH_PE_ISOLATED (and EEH_PE_CFG_BLOCKED, if required) and their PCI devices
  * as pci_channel_io_frozen.
  */

arch/powerpc/kernel/fadump.c

···
 static atomic_t cpus_in_fadump;
 static DEFINE_MUTEX(fadump_mutex);
 
-static struct fadump_mrange_info crash_mrange_info = { "crash", NULL, 0, 0, 0, false };
-
 #define RESERVED_RNGS_SZ	16384 /* 16K - 128 entries */
 #define RESERVED_RNGS_CNT	(RESERVED_RNGS_SZ / \
 				 sizeof(struct fadump_memory_range))
···
 #else
 static int __init fadump_cma_init(void) { return 1; }
 #endif /* CONFIG_CMA */
+
+/*
+ * Additional parameters meant for capture kernel are placed in a dedicated area.
+ * If this is capture kernel boot, append these parameters to bootargs.
+ */
+void __init fadump_append_bootargs(void)
+{
+	char *append_args;
+	size_t len;
+
+	if (!fw_dump.dump_active || !fw_dump.param_area_supported || !fw_dump.param_area)
+		return;
+
+	if (fw_dump.param_area >= fw_dump.boot_mem_top) {
+		if (memblock_reserve(fw_dump.param_area, COMMAND_LINE_SIZE)) {
+			pr_warn("WARNING: Can't use additional parameters area!\n");
+			fw_dump.param_area = 0;
+			return;
+		}
+	}
+
+	append_args = (char *)fw_dump.param_area;
+	len = strlen(boot_command_line);
+
+	/*
+	 * Too late to fail even if cmdline size exceeds. Truncate additional parameters
+	 * to cmdline size and proceed anyway.
+	 */
+	if (len + strlen(append_args) >= COMMAND_LINE_SIZE - 1)
+		pr_warn("WARNING: Appending parameters exceeds cmdline size. Truncating!\n");
+
+	pr_debug("Cmdline: %s\n", boot_command_line);
+	snprintf(boot_command_line + len, COMMAND_LINE_SIZE - len, " %s", append_args);
+	pr_info("Updated cmdline: %s\n", boot_command_line);
+}
 
 /* Scan the Firmware Assisted dump configuration details. */
 int __init early_init_dt_scan_fw_dump(unsigned long node, const char *uname,
···
 
 			d_start = end + 1;
 		}
-	}
-
-	return ret;
-}
-
-/*
- * Returns true, if there are no holes in boot memory area,
- * false otherwise.
- */
-bool is_fadump_boot_mem_contiguous(void)
-{
-	unsigned long d_start, d_end;
-	bool ret = false;
-	int i;
-
-	for (i = 0; i < fw_dump.boot_mem_regs_cnt; i++) {
-		d_start = fw_dump.boot_mem_addr[i];
-		d_end   = d_start + fw_dump.boot_mem_sz[i];
-
-		ret = is_fadump_mem_area_contiguous(d_start, d_end);
-		if (!ret)
-			break;
 	}
 
 	return ret;
···
 	size = PAGE_ALIGN(size);
 	size += fw_dump.boot_memory_size;
 	size += sizeof(struct fadump_crash_info_header);
-	size += sizeof(struct elfhdr); /* ELF core header.*/
-	size += sizeof(struct elf_phdr); /* place holder for cpu notes */
-	/* Program headers for crash memory regions. */
-	size += sizeof(struct elf_phdr) * (memblock_num_regions(memory) + 2);
-
-	size = PAGE_ALIGN(size);
 
 	/* This is to hold kernel metadata on platforms that support it */
 	size += (fw_dump.ops->fadump_get_metadata_size ?
···
 static int __init add_boot_mem_region(unsigned long rstart,
 				      unsigned long rsize)
 {
+	int max_boot_mem_rgns = fw_dump.ops->fadump_max_boot_mem_rgns();
 	int i = fw_dump.boot_mem_regs_cnt++;
 
-	if (fw_dump.boot_mem_regs_cnt > FADUMP_MAX_MEM_REGS) {
-		fw_dump.boot_mem_regs_cnt = FADUMP_MAX_MEM_REGS;
+	if (fw_dump.boot_mem_regs_cnt > max_boot_mem_rgns) {
+		fw_dump.boot_mem_regs_cnt = max_boot_mem_rgns;
 		return 0;
 	}
 
···
 		}
 	}
 
-	/*
-	 * Calculate the memory boundary.
-	 * If memory_limit is less than actual memory boundary then reserve
-	 * the memory for fadump beyond the memory_limit and adjust the
-	 * memory_limit accordingly, so that the running kernel can run with
-	 * specified memory_limit.
-	 */
-	if (memory_limit && memory_limit < memblock_end_of_DRAM()) {
-		size = get_fadump_area_size();
-		if ((memory_limit + size) < memblock_end_of_DRAM())
-			memory_limit += size;
-		else
-			memory_limit = memblock_end_of_DRAM();
-		printk(KERN_INFO "Adjusted memory_limit for firmware-assisted"
-				" dump, now %#016llx\n", memory_limit);
-	}
 	if (memory_limit)
 		mem_boundary = memory_limit;
 	else
···
 	 * old_cpu == -1 means this is the first CPU which has come here,
 	 * go ahead and trigger fadump.
 	 *
-	 * old_cpu != -1 means some other CPU has already on it's way
+	 * old_cpu != -1 means some other CPU has already on its way
 	 * to trigger fadump, just keep looping here.
 	 */
 	this_cpu = smp_processor_id();
···
 	return 0;
 }
 
-static int fadump_exclude_reserved_area(u64 start, u64 end)
-{
-	u64 ra_start, ra_end;
-	int ret = 0;
-
-	ra_start = fw_dump.reserve_dump_area_start;
-	ra_end = ra_start + fw_dump.reserve_dump_area_size;
-
-	if ((ra_start < end) && (ra_end > start)) {
-		if ((start < ra_start) && (end > ra_end)) {
-			ret = fadump_add_mem_range(&crash_mrange_info,
-						   start, ra_start);
-			if (ret)
-				return ret;
-
-			ret = fadump_add_mem_range(&crash_mrange_info,
-						   ra_end, end);
-		} else if (start < ra_start) {
-			ret = fadump_add_mem_range(&crash_mrange_info,
-						   start, ra_start);
-		} else if (ra_end < end) {
-			ret = fadump_add_mem_range(&crash_mrange_info,
-						   ra_end, end);
-		}
-	} else
-		ret = fadump_add_mem_range(&crash_mrange_info, start, end);
-
-	return ret;
-}
-
 static int fadump_init_elfcore_header(char *bufp)
 {
 	struct elfhdr *elf;
···
 }
 
 /*
- * Traverse through memblock structure and setup crash memory ranges. These
- * ranges will be used create PT_LOAD program headers in elfcore header.
- */
-static int fadump_setup_crash_memory_ranges(void)
-{
-	u64 i, start, end;
-	int ret;
-
-	pr_debug("Setup crash memory ranges.\n");
-	crash_mrange_info.mem_range_cnt = 0;
-
-	/*
-	 * Boot memory region(s) registered with firmware are moved to
-	 * different location at the time of crash. Create separate program
-	 * header(s) for this memory chunk(s) with the correct offset.
-	 */
-	for (i = 0; i < fw_dump.boot_mem_regs_cnt; i++) {
-		start = fw_dump.boot_mem_addr[i];
-		end = start + fw_dump.boot_mem_sz[i];
-		ret = fadump_add_mem_range(&crash_mrange_info, start, end);
-		if (ret)
-			return ret;
-	}
-
-	for_each_mem_range(i, &start, &end) {
-		/*
-		 * skip the memory chunk that is already added
-		 * (0 through boot_memory_top).
-		 */
-		if (start < fw_dump.boot_mem_top) {
-			if (end > fw_dump.boot_mem_top)
-				start = fw_dump.boot_mem_top;
-			else
-				continue;
-		}
-
-		/* add this range excluding the reserved dump area. */
-		ret = fadump_exclude_reserved_area(start, end);
-		if (ret)
-			return ret;
-	}
-
-	return 0;
-}
-
-/*
  * If the given physical address falls within the boot memory region then
  * return the relocated address that points to the dump region reserved
  * for saving initial boot memory contents.
···
 	return raddr;
 }
 
-static int fadump_create_elfcore_headers(char *bufp)
+static void __init populate_elf_pt_load(struct elf_phdr *phdr, u64 start,
+			     u64 size, unsigned long long offset)
 {
-	unsigned long long raddr, offset;
-	struct elf_phdr *phdr;
-	struct elfhdr *elf;
-	int i, j;
+	phdr->p_align	= 0;
+	phdr->p_memsz	= size;
+	phdr->p_filesz	= size;
+	phdr->p_paddr	= start;
+	phdr->p_offset	= offset;
+	phdr->p_type	= PT_LOAD;
+	phdr->p_flags	= PF_R|PF_W|PF_X;
+	phdr->p_vaddr	= (unsigned long)__va(start);
+}
 
+static void __init fadump_populate_elfcorehdr(struct fadump_crash_info_header *fdh)
+{
+	char *bufp;
+	struct elfhdr *elf;
+	struct elf_phdr *phdr;
+	u64 boot_mem_dest_offset;
+	unsigned long long i, ra_start, ra_end, ra_size, mstart, mend;
+
+	bufp = (char *) fw_dump.elfcorehdr_addr;
 	fadump_init_elfcore_header(bufp);
 	elf = (struct elfhdr *)bufp;
 	bufp += sizeof(struct elfhdr);
 
 	/*
-	 * setup ELF PT_NOTE, place holder for cpu notes info. The notes info
-	 * will be populated during second kernel boot after crash. Hence
-	 * this PT_NOTE will always be the first elf note.
+	 * Set up ELF PT_NOTE, a placeholder for CPU notes information.
+	 * The notes info will be populated later by platform-specific code.
+	 * Hence, this PT_NOTE will always be the first ELF note.
 	 *
 	 * NOTE: Any new ELF note addition should be placed after this note.
 	 */
 	phdr = (struct elf_phdr *)bufp;
 	bufp += sizeof(struct elf_phdr);
 	phdr->p_type = PT_NOTE;
-	phdr->p_flags = 0;
-	phdr->p_vaddr = 0;
-	phdr->p_align = 0;
-
-	phdr->p_offset = 0;
-	phdr->p_paddr = 0;
-	phdr->p_filesz = 0;
-	phdr->p_memsz = 0;
-
+	phdr->p_flags	= 0;
+	phdr->p_vaddr	= 0;
+	phdr->p_align	= 0;
+	phdr->p_offset	= 0;
+	phdr->p_paddr	= 0;
+	phdr->p_filesz	= 0;
+	phdr->p_memsz	= 0;
+	/* Increment number of program headers. */
 	(elf->e_phnum)++;
 
 	/* setup ELF PT_NOTE for vmcoreinfo */
···
 	phdr->p_flags	= 0;
 	phdr->p_vaddr	= 0;
 	phdr->p_align	= 0;
-
-	phdr->p_paddr	= fadump_relocate(paddr_vmcoreinfo_note());
-	phdr->p_offset	= phdr->p_paddr;
-	phdr->p_memsz	= phdr->p_filesz = VMCOREINFO_NOTE_SIZE;
-
+	phdr->p_paddr	= phdr->p_offset = fdh->vmcoreinfo_raddr;
+	phdr->p_memsz	= phdr->p_filesz = fdh->vmcoreinfo_size;
 	/* Increment number of program headers. */
 	(elf->e_phnum)++;
 
-	/* setup PT_LOAD sections. */
-	j = 0;
-	offset = 0;
-	raddr = fw_dump.boot_mem_addr[0];
-	for (i = 0; i < crash_mrange_info.mem_range_cnt; i++) {
-		u64 mbase, msize;
-
-		mbase = crash_mrange_info.mem_ranges[i].base;
-		msize = crash_mrange_info.mem_ranges[i].size;
-		if (!msize)
-			continue;
-
+	/*
+	 * Setup PT_LOAD sections. first include boot memory regions
+	 * and then add rest of the memory regions.
+	 */
+	boot_mem_dest_offset = fw_dump.boot_mem_dest_addr;
+	for (i = 0; i < fw_dump.boot_mem_regs_cnt; i++) {
 		phdr = (struct elf_phdr *)bufp;
 		bufp += sizeof(struct elf_phdr);
-		phdr->p_type	= PT_LOAD;
-		phdr->p_flags	= PF_R|PF_W|PF_X;
-		phdr->p_offset	= mbase;
+		populate_elf_pt_load(phdr, fw_dump.boot_mem_addr[i],
+				     fw_dump.boot_mem_sz[i],
+				     boot_mem_dest_offset);
+		/* Increment number of program headers. */
+		(elf->e_phnum)++;
+		boot_mem_dest_offset += fw_dump.boot_mem_sz[i];
+	}
 
-		if (mbase == raddr) {
-			/*
-			 * The entire real memory region will be moved by
-			 * firmware to the specified destination_address.
-			 * Hence set the correct offset.
-			 */
-			phdr->p_offset = fw_dump.boot_mem_dest_addr + offset;
-			if (j < (fw_dump.boot_mem_regs_cnt - 1)) {
-				offset += fw_dump.boot_mem_sz[j];
-				raddr = fw_dump.boot_mem_addr[++j];
-			}
+	/* Memory reserved for fadump in first kernel */
+	ra_start = fw_dump.reserve_dump_area_start;
+	ra_size = get_fadump_area_size();
+	ra_end = ra_start + ra_size;
+
+	phdr = (struct elf_phdr *)bufp;
+	for_each_mem_range(i, &mstart, &mend) {
+		/* Boot memory regions already added, skip them now */
+		if (mstart < fw_dump.boot_mem_top) {
+			if (mend > fw_dump.boot_mem_top)
+				mstart = fw_dump.boot_mem_top;
+			else
+				continue;
 		}
 
-		phdr->p_paddr = mbase;
-		phdr->p_vaddr = (unsigned long)__va(mbase);
-		phdr->p_filesz = msize;
-		phdr->p_memsz = msize;
-		phdr->p_align = 0;
+		/* Handle memblock regions overlaps with fadump reserved area */
+		if ((ra_start < mend) && (ra_end > mstart)) {
+			if ((mstart < ra_start) && (mend > ra_end)) {
+				populate_elf_pt_load(phdr, mstart, ra_start - mstart, mstart);
+				/* Increment number of program headers. */
+				(elf->e_phnum)++;
+				bufp += sizeof(struct elf_phdr);
+				phdr = (struct elf_phdr *)bufp;
+				populate_elf_pt_load(phdr, ra_end, mend - ra_end, ra_end);
+			} else if (mstart < ra_start) {
+				populate_elf_pt_load(phdr, mstart, ra_start - mstart, mstart);
+			} else if (ra_end < mend) {
+				populate_elf_pt_load(phdr, ra_end, mend - ra_end, ra_end);
+			}
+		} else {
+		/* No overlap with fadump reserved memory region */
+			populate_elf_pt_load(phdr, mstart, mend - mstart, mstart);
+		}
 
 		/* Increment number of program headers. */
 		(elf->e_phnum)++;
+		bufp += sizeof(struct elf_phdr);
+		phdr = (struct elf_phdr *) bufp;
 	}
-	return 0;
 }
 
 static unsigned long init_fadump_header(unsigned long addr)
···
 
 	memset(fdh, 0, sizeof(struct fadump_crash_info_header));
 	fdh->magic_number = FADUMP_CRASH_INFO_MAGIC;
-	fdh->elfcorehdr_addr = addr;
+	fdh->version = FADUMP_HEADER_VERSION;
 	/* We will set the crashing cpu id in crash_fadump() during crash. */
 	fdh->crashing_cpu = FADUMP_CPU_UNKNOWN;
+
+	/*
+	 * The physical address and size of vmcoreinfo are required in the
+	 * second kernel to prepare elfcorehdr.
+	 */
+	fdh->vmcoreinfo_raddr = fadump_relocate(paddr_vmcoreinfo_note());
+	fdh->vmcoreinfo_size = VMCOREINFO_NOTE_SIZE;
+
+
+	fdh->pt_regs_sz = sizeof(struct pt_regs);
 	/*
 	 * When LPAR is terminated by PYHP, ensure all possible CPUs'
 	 * register data is processed while exporting the vmcore.
 	 */
 	fdh->cpu_mask = *cpu_possible_mask;
+	fdh->cpu_mask_sz = sizeof(struct cpumask);
 
 	return addr;
 }
···
 static int register_fadump(void)
 {
 	unsigned long addr;
-	void *vaddr;
-	int ret;
 
 	/*
 	 * If no memory is reserved then we can not register for firmware-
···
 	if (!fw_dump.reserve_dump_area_size)
 		return -ENODEV;
 
-	ret = fadump_setup_crash_memory_ranges();
-	if (ret)
-		return ret;
-
 	addr = fw_dump.fadumphdr_addr;
 
 	/* Initialize fadump crash info header. */
 	addr = init_fadump_header(addr);
-	vaddr = __va(addr);
-
-	pr_debug("Creating ELF core headers at %#016lx\n", addr);
-	fadump_create_elfcore_headers(vaddr);
 
 	/* register the future kernel dump with firmware. */
 	pr_debug("Registering for firmware-assisted kernel dump...\n");
···
 	} else if (fw_dump.dump_registered) {
 		/* Un-register Firmware-assisted dump if it was registered. */
 		fw_dump.ops->fadump_unregister(&fw_dump);
-		fadump_free_mem_ranges(&crash_mrange_info);
 	}
 
 	if (fw_dump.ops->fadump_cleanup)
···
 		fadump_release_reserved_area(tstart, end);
 }
 
+static void fadump_free_elfcorehdr_buf(void)
+{
+	if (fw_dump.elfcorehdr_addr == 0 || fw_dump.elfcorehdr_size == 0)
+		return;
+
+	/*
+	 * Before freeing the memory of `elfcorehdr`, reset the global
+	 * `elfcorehdr_addr` to prevent modules like `vmcore` from accessing
+	 * invalid memory.
+	 */
+	elfcorehdr_addr = ELFCORE_ADDR_ERR;
+	fadump_free_buffer(fw_dump.elfcorehdr_addr, fw_dump.elfcorehdr_size);
+	fw_dump.elfcorehdr_addr = 0;
+	fw_dump.elfcorehdr_size = 0;
+}
+
 static void fadump_invalidate_release_mem(void)
 {
 	mutex_lock(&fadump_mutex);
···
 	fadump_cleanup();
 	mutex_unlock(&fadump_mutex);
 
+	fadump_free_elfcorehdr_buf();
 	fadump_release_memory(fw_dump.boot_mem_top, memblock_end_of_DRAM());
 	fadump_free_cpu_notes_buf();
 
···
 	return sprintf(buf, "%d\n", fw_dump.fadump_enabled);
 }
 
+/*
+ * /sys/kernel/fadump/hotplug_ready sysfs node returns 1, which inidcates
+ * to usersapce that fadump re-registration is not required on memory
+ * hotplug events.
+ */
+static ssize_t hotplug_ready_show(struct kobject *kobj,
+				      struct kobj_attribute *attr,
+				      char *buf)
+{
+	return sprintf(buf, "%d\n", 1);
+}
+
 static ssize_t mem_reserved_show(struct kobject *kobj,
 				 struct kobj_attribute *attr,
 				 char *buf)
···
 			       char *buf)
 {
 	return sprintf(buf, "%d\n", fw_dump.dump_registered);
+}
+
+static ssize_t bootargs_append_show(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   char *buf)
+{
+	return sprintf(buf, "%s\n", (char *)__va(fw_dump.param_area));
+}
+
+static ssize_t bootargs_append_store(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   const char *buf, size_t count)
+{
+	char *params;
+
+	if (!fw_dump.fadump_enabled || fw_dump.dump_active)
+		return -EPERM;
+
+	if (count >= COMMAND_LINE_SIZE)
+		return -EINVAL;
+
+	/*
+	 * Fail here instead of handling this scenario with
+	 * some silly workaround in capture kernel.
+	 */
+	if (saved_command_line_len + count >= COMMAND_LINE_SIZE) {
+		pr_err("Appending parameters exceeds cmdline size!\n");
+		return -ENOSPC;
+	}
+
+	params = __va(fw_dump.param_area);
+	strscpy_pad(params, buf, COMMAND_LINE_SIZE);
+	/* Remove newline character at the end. */
+	if (params[count-1] == '\n')
+		params[count-1] = '\0';
+
+	return count;
 }
 
 static ssize_t registered_store(struct kobject *kobj,
···
 static struct kobj_attribute enable_attr = __ATTR_RO(enabled);
 static struct kobj_attribute register_attr = __ATTR_RW(registered);
 static struct kobj_attribute mem_reserved_attr = __ATTR_RO(mem_reserved);
+static struct kobj_attribute hotplug_ready_attr = __ATTR_RO(hotplug_ready);
+static struct kobj_attribute bootargs_append_attr = __ATTR_RW(bootargs_append);
 
 static struct attribute *fadump_attrs[] = {
 	&enable_attr.attr,
 	&register_attr.attr,
 	&mem_reserved_attr.attr,
+	&hotplug_ready_attr.attr,
 	NULL,
 };
 
···
 	return;
 }
 
+static int __init fadump_setup_elfcorehdr_buf(void)
+{
+	int elf_phdr_cnt;
+	unsigned long elfcorehdr_size;
+
+	/*
+	 * Program header for CPU notes comes first, followed by one for
+	 * vmcoreinfo, and the remaining program headers correspond to
+	 * memory regions.
+	 */
+	elf_phdr_cnt = 2 + fw_dump.boot_mem_regs_cnt + memblock_num_regions(memory);
+	elfcorehdr_size = sizeof(struct elfhdr) + (elf_phdr_cnt * sizeof(struct elf_phdr));
+	elfcorehdr_size = PAGE_ALIGN(elfcorehdr_size);
+
+	fw_dump.elfcorehdr_addr = (u64)fadump_alloc_buffer(elfcorehdr_size);
+	if (!fw_dump.elfcorehdr_addr) {
+		pr_err("Failed to allocate %lu bytes for elfcorehdr\n",
+		       elfcorehdr_size);
+		return -ENOMEM;
+	}
+	fw_dump.elfcorehdr_size = elfcorehdr_size;
+	return 0;
+}
+
+/*
+ * Check if the fadump header of crashed kernel is compatible with fadump kernel.
+ *
+ * It checks the magic number, endianness, and size of non-primitive type
+ * members of fadump header to ensure safe dump collection.
+ */
+static bool __init is_fadump_header_compatible(struct fadump_crash_info_header *fdh)
+{
+	if (fdh->magic_number == FADUMP_CRASH_INFO_MAGIC_OLD) {
+		pr_err("Old magic number, can't process the dump.\n");
+		return false;
+	}
+
+	if (fdh->magic_number != FADUMP_CRASH_INFO_MAGIC) {
+		if (fdh->magic_number == swab64(FADUMP_CRASH_INFO_MAGIC))
+			pr_err("Endianness mismatch between the crashed and fadump kernels.\n");
+		else
+			pr_err("Fadump header is corrupted.\n");
+
+		return false;
+	}
+
+	/*
+	 * Dump collection is not safe if the size of non-primitive type members
+	 * of the fadump header do not match between crashed and fadump kernel.
+	 */
+	if (fdh->pt_regs_sz != sizeof(struct pt_regs) ||
+	    fdh->cpu_mask_sz != sizeof(struct cpumask)) {
+		pr_err("Fadump header size mismatch.\n");
+		return false;
+	}
+
+	return true;
+}
+
+static void __init fadump_process(void)
+{
+	struct fadump_crash_info_header *fdh;
+
+	fdh = (struct fadump_crash_info_header *) __va(fw_dump.fadumphdr_addr);
+	if (!fdh) {
+		pr_err("Crash info header is empty.\n");
+		goto err_out;
+	}
+
+	/* Avoid processing the dump if fadump header isn't compatible */
+	if (!is_fadump_header_compatible(fdh))
+		goto err_out;
+
+	/* Allocate buffer for elfcorehdr */
+	if (fadump_setup_elfcorehdr_buf())
+		goto err_out;
+
+	fadump_populate_elfcorehdr(fdh);
+
+	/* Let platform update the CPU notes in elfcorehdr */
+	if (fw_dump.ops->fadump_process(&fw_dump) < 0)
+		goto err_out;
+
+	/*
+	 * elfcorehdr is now ready to be exported.
+	 *
+	 * set elfcorehdr_addr so that vmcore module will export the
+	 * elfcorehdr through '/proc/vmcore'.
+	 */
+	elfcorehdr_addr = virt_to_phys((void *)fw_dump.elfcorehdr_addr);
+	return;
+
+err_out:
+	fadump_invalidate_release_mem();
+}
+
+/*
+ * Reserve memory to store additional parameters to be passed
+ * for fadump/capture kernel.
+ */
+static void __init fadump_setup_param_area(void)
+{
+	phys_addr_t range_start, range_end;
+
+	if (!fw_dump.param_area_supported || fw_dump.dump_active)
+		return;
+
+	/* This memory can't be used by PFW or bootloader as it is shared across kernels */
+	if (radix_enabled()) {
+		/*
+		 * Anywhere in the upper half should be good enough as all memory
+		 * is accessible in real mode.
+		 */
+		range_start = memblock_end_of_DRAM() / 2;
+		range_end = memblock_end_of_DRAM();
+	} else {
+		/*
+		 * Passing additional parameters is supported for hash MMU only
+		 * if the first memory block size is 768MB or higher.
+		 */
+		if (ppc64_rma_size < 0x30000000)
+			return;
+
+		/*
+		 * 640 MB to 768 MB is not used by PFW/bootloader. So, try reserving
+		 * memory for passing additional parameters in this range to avoid
+		 * being stomped on by PFW/bootloader.
+		 */
+		range_start = 0x2A000000;
+		range_end = range_start + 0x4000000;
+	}
+
+	fw_dump.param_area = memblock_phys_alloc_range(COMMAND_LINE_SIZE,
+						       COMMAND_LINE_SIZE,
+						       range_start,
+						       range_end);
+	if (!fw_dump.param_area || sysfs_create_file(fadump_kobj, &bootargs_append_attr.attr)) {
+		pr_warn("WARNING: Could not setup area to pass additional parameters!\n");
+		return;
+	}
+
+	memset(phys_to_virt(fw_dump.param_area), 0, COMMAND_LINE_SIZE);
+}
+
 /*
  * Prepare for firmware-assisted dump.
  */
···
 	 * saving it to the disk.
 	 */
 	if (fw_dump.dump_active) {
-		/*
-		 * if dump process fails then invalidate the registration
-		 * and release memory before proceeding for re-registration.
-		 */
-		if (fw_dump.ops->fadump_process(&fw_dump) < 0)
-			fadump_invalidate_release_mem();
+		fadump_process();
 	}
 	/* Initialize the kernel dump memory structure and register with f/w */
 	else if (fw_dump.reserve_dump_area_size) {
+		fadump_setup_param_area();
 		fw_dump.ops->fadump_init_mem_struct(&fw_dump);
 		register_fadump();
 	}

arch/powerpc/kernel/misc_64.S

···
 	xori	r0,r0,MSR_EE
 	mtmsrd	r0,1
 
-	/* rotate 24 bits SCOM address 8 bits left and mask out it's low 8 bits
+	/* rotate 24 bits SCOM address 8 bits left and mask out its low 8 bits
 	 * (including parity). On current CPUs they must be 0'd,
 	 * and finally or in RW bit
 	 */
···
 	xori	r0,r0,MSR_EE
 	mtmsrd	r0,1
 
-	/* rotate 24 bits SCOM address 8 bits left and mask out it's low 8 bits
+	/* rotate 24 bits SCOM address 8 bits left and mask out its low 8 bits
 	 * (including parity). On current CPUs they must be 0'd.
 	 */
 

arch/powerpc/kernel/module.c

···
 #include <asm/setup.h>
 #include <asm/sections.h>
 
-static LIST_HEAD(module_bug_list);
-
 static const Elf_Shdr *find_section(const Elf_Ehdr *hdr,
 				    const Elf_Shdr *sechdrs,
 				    const char *name)

arch/powerpc/kernel/process.c

···
 
 	if (cpu_has_feature(CPU_FTR_DEXCR_NPHIE))
 		t->hashkeyr = mfspr(SPRN_HASHKEYR);
+
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
+		t->dexcr = mfspr(SPRN_DEXCR);
 #endif
 }
 
···
 	if (cpu_has_feature(CPU_FTR_DEXCR_NPHIE) &&
 	    old_thread->hashkeyr != new_thread->hashkeyr)
 		mtspr(SPRN_HASHKEYR, new_thread->hashkeyr);
+
+	if (cpu_has_feature(CPU_FTR_ARCH_31) &&
+	    old_thread->dexcr != new_thread->dexcr)
+		mtspr(SPRN_DEXCR, new_thread->dexcr);
 #endif
 
 }
···
 	current->thread.regs->amr  = default_amr;
 	current->thread.regs->iamr  = default_iamr;
 #endif
+
+#ifdef CONFIG_PPC_BOOK3S_64
+	if (cpu_has_feature(CPU_FTR_ARCH_31)) {
+		current->thread.dexcr = current->thread.dexcr_onexec;
+		mtspr(SPRN_DEXCR, current->thread.dexcr);
+	}
+#endif /* CONFIG_PPC_BOOK3S_64 */
 }
 
 #ifdef CONFIG_PPC64
···
  * cases will happen:
  *
  * 1. The correct thread is running, the wrong thread is not
- * In this situation, the correct thread is woken and proceeds to pass it's
+ * In this situation, the correct thread is woken and proceeds to pass its
  * condition check.
  *
  * 2. Neither threads are running
···
  * for the wrong thread, or they will execute the condition check immediately.
  *
  * 3. The wrong thread is running, the correct thread is not
- * The wrong thread will be woken, but will fail it's condition check and
+ * The wrong thread will be woken, but will fail its condition check and
  * re-execute wait. The correct thread, when scheduled, will execute either
- * it's condition check (which will pass), or wait, which returns immediately
- * when called the first time after the thread is scheduled, followed by it's
+ * its condition check (which will pass), or wait, which returns immediately
+ * when called the first time after the thread is scheduled, followed by its
  * condition check (which will pass).
  *
  * 4. Both threads are running
- * Both threads will be woken. The wrong thread will fail it's condition check
- * and execute another wait, while the correct thread will pass it's condition
+ * Both threads will be woken. The wrong thread will fail its condition check
+ * and execute another wait, while the correct thread will pass its condition
  * check.
  *
  * @t: the task to set the thread ID for
···
 #ifdef CONFIG_PPC_BOOK3S_64
 	if (cpu_has_feature(CPU_FTR_DEXCR_NPHIE))
 		p->thread.hashkeyr = current->thread.hashkeyr;
+
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
+		p->thread.dexcr = mfspr(SPRN_DEXCR);
 #endif
 	return 0;
 }

arch/powerpc/kernel/prom.c

···
 
 void __init early_init_devtree(void *params)
 {
-	phys_addr_t limit;
+	phys_addr_t int_vector_size;
 
 	DBG(" -> early_init_devtree(%px)\n", params);
 
···
 	 */
 	of_scan_flat_dt(early_init_dt_scan_chosen_ppc, boot_command_line);
 
+	/* Append additional parameters passed for fadump capture kernel */
+	fadump_append_bootargs();
+
 	/* Scan memory nodes and rebuild MEMBLOCKs */
 	early_init_dt_scan_root();
 	early_init_dt_scan_memory_ppc();
···
 	setup_initial_memory_limit(memstart_addr, first_memblock_size);
 	/* Reserve MEMBLOCK regions used by kernel, initrd, dt, etc... */
 	memblock_reserve(PHYSICAL_START, __pa(_end) - PHYSICAL_START);
+#ifdef CONFIG_PPC64
+	/* If relocatable, reserve at least 32k for interrupt vectors etc. */
+	int_vector_size = __end_interrupts - _stext;
+	int_vector_size = max_t(phys_addr_t, SZ_32K, int_vector_size);
+#else
 	/* If relocatable, reserve first 32k for interrupt vectors etc. */
+	int_vector_size = SZ_32K;
+#endif
 	if (PHYSICAL_START > MEMORY_START)
-		memblock_reserve(MEMORY_START, 0x8000);
+		memblock_reserve(MEMORY_START, int_vector_size);
 	reserve_kdump_trampoline();
 #if defined(CONFIG_FA_DUMP) || defined(CONFIG_PRESERVE_FA_DUMP)
 	/*
···
 		reserve_crashkernel();
 	early_reserve_mem();
 
-	/* Ensure that total memory size is page-aligned. */
-	limit = ALIGN(memory_limit ?: memblock_phys_mem_size(), PAGE_SIZE);
-	memblock_enforce_memory_limit(limit);
+	if (memory_limit > memblock_phys_mem_size())
+		memory_limit = 0;
+
+	/* Align down to 16 MB which is large page size with hash page translation */
+	memory_limit = ALIGN_DOWN(memory_limit ?: memblock_phys_mem_size(), SZ_16M);
+	memblock_enforce_memory_limit(memory_limit);
 
 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_4K_PAGES)
 	if (!early_radix_enabled())

arch/powerpc/kernel/prom_init.c

···
 		opt += 4;
 		prom_memory_limit = prom_memparse(opt, (const char **)&opt);
 #ifdef CONFIG_PPC64
-		/* Align to 16 MB == size of ppc64 large page */
-		prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
+		/* Align down to 16 MB which is large page size with hash page translation */
+		prom_memory_limit = ALIGN_DOWN(prom_memory_limit, SZ_16M);
 #endif
 	}
 

arch/powerpc/kernel/ptrace/ptrace-tm.c

···
 {
 	/*
 	 * If task is not current, it will have been flushed already to
-	 * it's thread_struct during __switch_to().
+	 * its thread_struct during __switch_to().
 	 *
 	 * A reclaim flushes ALL the state or if not in TM save TM SPRs
 	 * in the appropriate thread structures from live.

arch/powerpc/kernel/ptrace/ptrace-view.c

···
 	if (!cpu_has_feature(CPU_FTR_ARCH_31))
 		return -ENODEV;
 
-	/*
-	 * The DEXCR is currently static across all CPUs, so we don't
-	 * store the target's value anywhere, but the static value
-	 * will also be correct.
-	 */
-	membuf_store(&to, (u64)lower_32_bits(DEXCR_INIT));
+	membuf_store(&to, (u64)lower_32_bits(target->thread.dexcr));
 
 	/*
 	 * Technically the HDEXCR is per-cpu, but a hypervisor can't reasonably

arch/powerpc/kernel/setup-common.c

···
 		cpumask_set_cpu(i, &threads_core_mask);
 
 	printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n",
-	       tpc, tpc > 1 ? "s" : "");
+	       tpc, str_plural(tpc));
 	printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift);
 }
 

arch/powerpc/kernel/setup_64.c

···
 
 unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
 EXPORT_SYMBOL(__per_cpu_offset);
+DEFINE_STATIC_KEY_FALSE(__percpu_first_chunk_is_paged);
 
 void __init setup_per_cpu_areas(void)
 {
···
 	if (rc < 0)
 		panic("cannot initialize percpu area (err=%d)", rc);
 
+	static_key_enable(&__percpu_first_chunk_is_paged.key);
 	delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
 	for_each_possible_cpu(cpu) {
                 __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu];

arch/powerpc/kernel/smp.c

···
 
 	/*
 	 * This CPU will not be in the online mask yet so we need to manually
-	 * add it to it's own thread sibling mask.
+	 * add it to its own thread sibling mask.
 	 */
 	map_cpu_to_node(cpu, cpu_to_node(cpu));
 	cpumask_set_cpu(cpu, cpu_sibling_mask(cpu));

arch/powerpc/kernel/sysfs.c

···
  * @val:	Returned cpu specific DSCR default value
  *
  * This function returns the per cpu DSCR default value
- * for any cpu which is contained in it's PACA structure.
+ * for any cpu which is contained in its PACA structure.
  */
 static void read_dscr(void *val)
 {
···
  * @val:	New cpu specific DSCR default value to update
  *
  * This function updates the per cpu DSCR default value
- * for any cpu which is contained in it's PACA structure.
+ * for any cpu which is contained in its PACA structure.
  */
 static void write_dscr(void *val)
 {

arch/powerpc/kexec/Makefile

···
 # Makefile for the linux kernel.
 #
 
-obj-y				+= core.o core_$(BITS).o
+obj-y				+= core.o core_$(BITS).o ranges.o
 
 obj-$(CONFIG_PPC32)		+= relocate_32.o
 
-obj-$(CONFIG_KEXEC_FILE)	+= file_load.o ranges.o file_load_$(BITS).o elf_$(BITS).o
+obj-$(CONFIG_KEXEC_FILE)	+= file_load.o file_load_$(BITS).o elf_$(BITS).o
 obj-$(CONFIG_VMCORE_INFO)	+= vmcore_info.o
 obj-$(CONFIG_CRASH_DUMP)	+= crash.o
 

arch/powerpc/kexec/core_64.c

···
 #include <linux/cpu.h>
 #include <linux/hardirq.h>
 #include <linux/of.h>
+#include <linux/libfdt.h>
 
 #include <asm/page.h>
 #include <asm/current.h>
···
 #include <asm/hw_breakpoint.h>
 #include <asm/svm.h>
 #include <asm/ultravisor.h>
+#include <asm/crashdump-ppc64.h>
 
 int machine_kexec_prepare(struct kimage *image)
 {
···
 }
 late_initcall(export_htab_values);
 #endif /* CONFIG_PPC_64S_HASH_MMU */
+
+#if defined(CONFIG_KEXEC_FILE) || defined(CONFIG_CRASH_DUMP)
+/**
+ * add_node_props - Reads node properties from device node structure and add
+ *                  them to fdt.
+ * @fdt:            Flattened device tree of the kernel
+ * @node_offset:    offset of the node to add a property at
+ * @dn:             device node pointer
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+static int add_node_props(void *fdt, int node_offset, const struct device_node *dn)
+{
+	int ret = 0;
+	struct property *pp;
+
+	if (!dn)
+		return -EINVAL;
+
+	for_each_property_of_node(dn, pp) {
+		ret = fdt_setprop(fdt, node_offset, pp->name, pp->value, pp->length);
+		if (ret < 0) {
+			pr_err("Unable to add %s property: %s\n", pp->name, fdt_strerror(ret));
+			return ret;
+		}
+	}
+	return ret;
+}
+
+/**
+ * update_cpus_node - Update cpus node of flattened device tree using of_root
+ *                    device node.
+ * @fdt:              Flattened device tree of the kernel.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int update_cpus_node(void *fdt)
+{
+	struct device_node *cpus_node, *dn;
+	int cpus_offset, cpus_subnode_offset, ret = 0;
+
+	cpus_offset = fdt_path_offset(fdt, "/cpus");
+	if (cpus_offset < 0 && cpus_offset != -FDT_ERR_NOTFOUND) {
+		pr_err("Malformed device tree: error reading /cpus node: %s\n",
+		       fdt_strerror(cpus_offset));
+		return cpus_offset;
+	}
+
+	if (cpus_offset > 0) {
+		ret = fdt_del_node(fdt, cpus_offset);
+		if (ret < 0) {
+			pr_err("Error deleting /cpus node: %s\n", fdt_strerror(ret));
+			return -EINVAL;
+		}
+	}
+
+	/* Add cpus node to fdt */
+	cpus_offset = fdt_add_subnode(fdt, fdt_path_offset(fdt, "/"), "cpus");
+	if (cpus_offset < 0) {
+		pr_err("Error creating /cpus node: %s\n", fdt_strerror(cpus_offset));
+		return -EINVAL;
+	}
+
+	/* Add cpus node properties */
+	cpus_node = of_find_node_by_path("/cpus");
+	ret = add_node_props(fdt, cpus_offset, cpus_node);
+	of_node_put(cpus_node);
+	if (ret < 0)
+		return ret;
+
+	/* Loop through all subnodes of cpus and add them to fdt */
+	for_each_node_by_type(dn, "cpu") {
+		cpus_subnode_offset = fdt_add_subnode(fdt, cpus_offset, dn->full_name);
+		if (cpus_subnode_offset < 0) {
+			pr_err("Unable to add %s subnode: %s\n", dn->full_name,
+			       fdt_strerror(cpus_subnode_offset));
+			ret = cpus_subnode_offset;
+			goto out;
+		}
+
+		ret = add_node_props(fdt, cpus_subnode_offset, dn);
+		if (ret < 0)
+			goto out;
+	}
+out:
+	of_node_put(dn);
+	return ret;
+}
+#endif /* CONFIG_KEXEC_FILE || CONFIG_CRASH_DUMP */

arch/powerpc/kexec/crash.c

···
 #include <linux/delay.h>
 #include <linux/irq.h>
 #include <linux/types.h>
+#include <linux/libfdt.h>
+#include <linux/memory.h>
 
 #include <asm/processor.h>
 #include <asm/machdep.h>
···
 #include <asm/setjmp.h>
 #include <asm/debug.h>
 #include <asm/interrupt.h>
+#include <asm/kexec_ranges.h>
 
 /*
  * The primary CPU waits a while for all secondary CPUs to enter. This is to
···
 	if (ppc_md.kexec_cpu_down)
 		ppc_md.kexec_cpu_down(1, 0);
 }
+
+#ifdef CONFIG_CRASH_HOTPLUG
+#undef pr_fmt
+#define pr_fmt(fmt) "crash hp: " fmt
+
+/*
+ * Advertise preferred elfcorehdr size to userspace via
+ * /sys/kernel/crash_elfcorehdr_size sysfs interface.
+ */
+unsigned int arch_crash_get_elfcorehdr_size(void)
+{
+	unsigned long phdr_cnt;
+
+	/* A program header for possible CPUs + vmcoreinfo */
+	phdr_cnt = num_possible_cpus() + 1;
+	if (IS_ENABLED(CONFIG_MEMORY_HOTPLUG))
+		phdr_cnt += CONFIG_CRASH_MAX_MEMORY_RANGES;
+
+	return sizeof(struct elfhdr) + (phdr_cnt * sizeof(Elf64_Phdr));
+}
+
+/**
+ * update_crash_elfcorehdr() - Recreate the elfcorehdr and replace it with old
+ *			       elfcorehdr in the kexec segment array.
+ * @image: the active struct kimage
+ * @mn: struct memory_notify data handler
+ */
+static void update_crash_elfcorehdr(struct kimage *image, struct memory_notify *mn)
+{
+	int ret;
+	struct crash_mem *cmem = NULL;
+	struct kexec_segment *ksegment;
+	void *ptr, *mem, *elfbuf = NULL;
+	unsigned long elfsz, memsz, base_addr, size;
+
+	ksegment = &image->segment[image->elfcorehdr_index];
+	mem = (void *) ksegment->mem;
+	memsz = ksegment->memsz;
+
+	ret = get_crash_memory_ranges(&cmem);
+	if (ret) {
+		pr_err("Failed to get crash mem range\n");
+		return;
+	}
+
+	/*
+	 * The hot unplugged memory is part of crash memory ranges,
+	 * remove it here.
+	 */
+	if (image->hp_action == KEXEC_CRASH_HP_REMOVE_MEMORY) {
+		base_addr = PFN_PHYS(mn->start_pfn);
+		size = mn->nr_pages * PAGE_SIZE;
+		ret = remove_mem_range(&cmem, base_addr, size);
+		if (ret) {
+			pr_err("Failed to remove hot-unplugged memory from crash memory ranges\n");
+			goto out;
+		}
+	}
+
+	ret = crash_prepare_elf64_headers(cmem, false, &elfbuf, &elfsz);
+	if (ret) {
+		pr_err("Failed to prepare elf header\n");
+		goto out;
+	}
+
+	/*
+	 * It is unlikely that kernel hit this because elfcorehdr kexec
+	 * segment (memsz) is built with addition space to accommodate growing
+	 * number of crash memory ranges while loading the kdump kernel. It is
+	 * Just to avoid any unforeseen case.
+	 */
+	if (elfsz > memsz) {
+		pr_err("Updated crash elfcorehdr elfsz %lu > memsz %lu", elfsz, memsz);
+		goto out;
+	}
+
+	ptr = __va(mem);
+	if (ptr) {
+		/* Temporarily invalidate the crash image while it is replaced */
+		xchg(&kexec_crash_image, NULL);
+
+		/* Replace the old elfcorehdr with newly prepared elfcorehdr */
+		memcpy((void *)ptr, elfbuf, elfsz);
+
+		/* The crash image is now valid once again */
+		xchg(&kexec_crash_image, image);
+	}
+out:
+	kvfree(cmem);
+	kvfree(elfbuf);
+}
+
+/**
+ * get_fdt_index - Loop through the kexec segment array and find
+ *		   the index of the FDT segment.
+ * @image: a pointer to kexec_crash_image
+ *
+ * Returns the index of FDT segment in the kexec segment array
+ * if found; otherwise -1.
+ */
+static int get_fdt_index(struct kimage *image)
+{
+	void *ptr;
+	unsigned long mem;
+	int i, fdt_index = -1;
+
+	/* Find the FDT segment index in kexec segment array. */
+	for (i = 0; i < image->nr_segments; i++) {
+		mem = image->segment[i].mem;
+		ptr = __va(mem);
+
+		if (ptr && fdt_magic(ptr) == FDT_MAGIC) {
+			fdt_index = i;
+			break;
+		}
+	}
+
+	return fdt_index;
+}
+
+/**
+ * update_crash_fdt - updates the cpus node of the crash FDT.
+ *
+ * @image: a pointer to kexec_crash_image
+ */
+static void update_crash_fdt(struct kimage *image)
+{
+	void *fdt;
+	int fdt_index;
+
+	fdt_index = get_fdt_index(image);
+	if (fdt_index < 0) {
+		pr_err("Unable to locate FDT segment.\n");
+		return;
+	}
+
+	fdt = __va((void *)image->segment[fdt_index].mem);
+
+	/* Temporarily invalidate the crash image while it is replaced */
+	xchg(&kexec_crash_image, NULL);
+
+	/* update FDT to reflect changes in CPU resources */
+	if (update_cpus_node(fdt))
+		pr_err("Failed to update crash FDT");
+
+	/* The crash image is now valid once again */
+	xchg(&kexec_crash_image, image);
+}
+
+int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags)
+{
+#ifdef CONFIG_KEXEC_FILE
+	if (image->file_mode)
+		return 1;
+#endif
+	return kexec_flags & KEXEC_CRASH_HOTPLUG_SUPPORT;
+}
+
+/**
+ * arch_crash_handle_hotplug_event - Handle crash CPU/Memory hotplug events to update the
+ *				     necessary kexec segments based on the hotplug event.
+ * @image: a pointer to kexec_crash_image
+ * @arg: struct memory_notify handler for memory hotplug case and NULL for CPU hotplug case.
+ *
+ * Update the kdump image based on the type of hotplug event, represented by image->hp_action.
+ * CPU add: Update the FDT segment to include the newly added CPU.
+ * CPU remove: No action is needed, with the assumption that it's okay to have offline CPUs
+ *	       part of the FDT.
+ * Memory add/remove: No action is taken as this is not yet supported.
+ */
+void arch_crash_handle_hotplug_event(struct kimage *image, void *arg)
+{
+	struct memory_notify *mn;
+
+	switch (image->hp_action) {
+	case KEXEC_CRASH_HP_REMOVE_CPU:
+		return;
+
+	case KEXEC_CRASH_HP_ADD_CPU:
+		update_crash_fdt(image);
+		break;
+
+	case KEXEC_CRASH_HP_REMOVE_MEMORY:
+	case KEXEC_CRASH_HP_ADD_MEMORY:
+		mn = (struct memory_notify *)arg;
+		update_crash_elfcorehdr(image, mn);
+		return;
+	default:
+		pr_warn_once("Unknown hotplug action\n");
+	}
+}
+#endif /* CONFIG_CRASH_HOTPLUG */

arch/powerpc/kexec/elf_64.c

···
 	if (ret)
 		goto out_free_fdt;
 
-	fdt_pack(fdt);
+	if (!IS_ENABLED(CONFIG_CRASH_HOTPLUG) || image->type != KEXEC_TYPE_CRASH)
+		fdt_pack(fdt);
 
 	kbuf.buffer = fdt;
 	kbuf.bufsz = kbuf.memsz = fdt_totalsize(fdt);

arch/powerpc/kexec/file_load_64.c

···
 #include <asm/iommu.h>
 #include <asm/prom.h>
 #include <asm/plpks.h>
+#include <asm/cputhreads.h>
 
 struct umem_info {
 	__be64 *buf;		/* data buffer for usable-memory property */
···
 	&kexec_elf64_ops,
 	NULL
 };
-
-/**
- * get_exclude_memory_ranges - Get exclude memory ranges. This list includes
- *                             regions like opal/rtas, tce-table, initrd,
- *                             kernel, htab which should be avoided while
- *                             setting up kexec load segments.
- * @mem_ranges:                Range list to add the memory ranges to.
- *
- * Returns 0 on success, negative errno on error.
- */
-static int get_exclude_memory_ranges(struct crash_mem **mem_ranges)
-{
-	int ret;
-
-	ret = add_tce_mem_ranges(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_initrd_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_htab_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_kernel_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_rtas_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_opal_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_reserved_mem_ranges(mem_ranges);
-	if (ret)
-		goto out;
-
-	/* exclude memory ranges should be sorted for easy lookup */
-	sort_memory_ranges(*mem_ranges, true);
-out:
-	if (ret)
-		pr_err("Failed to setup exclude memory ranges\n");
-	return ret;
-}
-
-/**
- * get_reserved_memory_ranges - Get reserve memory ranges. This list includes
- *                              memory regions that should be added to the
- *                              memory reserve map to ensure the region is
- *                              protected from any mischief.
- * @mem_ranges:                 Range list to add the memory ranges to.
- *
- * Returns 0 on success, negative errno on error.
- */
-static int get_reserved_memory_ranges(struct crash_mem **mem_ranges)
-{
-	int ret;
-
-	ret = add_rtas_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_tce_mem_ranges(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_reserved_mem_ranges(mem_ranges);
-out:
-	if (ret)
-		pr_err("Failed to setup reserved memory ranges\n");
-	return ret;
-}
 
 /**
  * __locate_mem_hole_top_down - Looks top down for a large enough memory hole
···
 }
 
 #ifdef CONFIG_CRASH_DUMP
-/**
- * get_usable_memory_ranges - Get usable memory ranges. This list includes
- *                            regions like crashkernel, opal/rtas & tce-table,
- *                            that kdump kernel could use.
- * @mem_ranges:               Range list to add the memory ranges to.
- *
- * Returns 0 on success, negative errno on error.
- */
-static int get_usable_memory_ranges(struct crash_mem **mem_ranges)
-{
-	int ret;
-
-	/*
-	 * Early boot failure observed on guests when low memory (first memory
-	 * block?) is not added to usable memory. So, add [0, crashk_res.end]
-	 * instead of [crashk_res.start, crashk_res.end] to workaround it.
-	 * Also, crashed kernel's memory must be added to reserve map to
-	 * avoid kdump kernel from using it.
-	 */
-	ret = add_mem_range(mem_ranges, 0, crashk_res.end + 1);
-	if (ret)
-		goto out;
-
-	ret = add_rtas_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_opal_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_tce_mem_ranges(mem_ranges);
-out:
-	if (ret)
-		pr_err("Failed to setup usable memory ranges\n");
-	return ret;
-}
-
-/**
- * get_crash_memory_ranges - Get crash memory ranges. This list includes
- *                           first/crashing kernel's memory regions that
- *                           would be exported via an elfcore.
- * @mem_ranges:              Range list to add the memory ranges to.
- *
- * Returns 0 on success, negative errno on error.
- */
-static int get_crash_memory_ranges(struct crash_mem **mem_ranges)
-{
-	phys_addr_t base, end;
-	struct crash_mem *tmem;
-	u64 i;
-	int ret;
-
-	for_each_mem_range(i, &base, &end) {
-		u64 size = end - base;
-
-		/* Skip backup memory region, which needs a separate entry */
-		if (base == BACKUP_SRC_START) {
-			if (size > BACKUP_SRC_SIZE) {
-				base = BACKUP_SRC_END + 1;
-				size -= BACKUP_SRC_SIZE;
-			} else
-				continue;
-		}
-
-		ret = add_mem_range(mem_ranges, base, size);
-		if (ret)
-			goto out;
-
-		/* Try merging adjacent ranges before reallocation attempt */
-		if ((*mem_ranges)->nr_ranges == (*mem_ranges)->max_nr_ranges)
-			sort_memory_ranges(*mem_ranges, true);
-	}
-
-	/* Reallocate memory ranges if there is no space to split ranges */
-	tmem = *mem_ranges;
-	if (tmem && (tmem->nr_ranges == tmem->max_nr_ranges)) {
-		tmem = realloc_mem_ranges(mem_ranges);
-		if (!tmem)
-			goto out;
-	}
-
-	/* Exclude crashkernel region */
-	ret = crash_exclude_mem_range(tmem, crashk_res.start, crashk_res.end);
-	if (ret)
-		goto out;
-
-	/*
-	 * FIXME: For now, stay in parity with kexec-tools but if RTAS/OPAL
-	 *        regions are exported to save their context at the time of
-	 *        crash, they should actually be backed up just like the
-	 *        first 64K bytes of memory.
-	 */
-	ret = add_rtas_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	ret = add_opal_mem_range(mem_ranges);
-	if (ret)
-		goto out;
-
-	/* create a separate program header for the backup region */
-	ret = add_mem_range(mem_ranges, BACKUP_SRC_START, BACKUP_SRC_SIZE);
-	if (ret)
-		goto out;
-
-	sort_memory_ranges(*mem_ranges, false);
-out:
-	if (ret)
-		pr_err("Failed to setup crash memory ranges\n");
-	return ret;
-}
-
 /**
  * check_realloc_usable_mem - Reallocate buffer if it can't accommodate entries
  * @um_info:                  Usable memory buffer and ranges info.
···
 	}
 }
 
+static unsigned int kdump_extra_elfcorehdr_size(struct crash_mem *cmem)
+{
+#if defined(CONFIG_CRASH_HOTPLUG) && defined(CONFIG_MEMORY_HOTPLUG)
+	unsigned int extra_sz = 0;
+
+	if (CONFIG_CRASH_MAX_MEMORY_RANGES > (unsigned int)PN_XNUM)
+		pr_warn("Number of Phdrs %u exceeds max\n", CONFIG_CRASH_MAX_MEMORY_RANGES);
+	else if (cmem->nr_ranges >= CONFIG_CRASH_MAX_MEMORY_RANGES)
+		pr_warn("Configured crash mem ranges may not be enough\n");
+	else
+		extra_sz = (CONFIG_CRASH_MAX_MEMORY_RANGES - cmem->nr_ranges) * sizeof(Elf64_Phdr);
+
+	return extra_sz;
+#endif
+	return 0;
+}
+
 /**
  * load_elfcorehdr_segment - Setup crash memory ranges and initialize elfcorehdr
  *                           segment needed to load kdump kernel.
···
 
 	kbuf->buffer = headers;
 	kbuf->mem = KEXEC_BUF_MEM_UNKNOWN;
-	kbuf->bufsz = kbuf->memsz = headers_sz;
+	kbuf->bufsz = headers_sz;
+	kbuf->memsz = headers_sz + kdump_extra_elfcorehdr_size(cmem);
 	kbuf->top_down = false;
 
 	ret = kexec_add_buffer(kbuf);
···
 	unsigned int cpu_nodes, extra_size = 0;
 	struct device_node *dn;
 	u64 usm_entries;
+#ifdef CONFIG_CRASH_HOTPLUG
+	unsigned int possible_cpu_nodes;
+#endif
 
 	if (!IS_ENABLED(CONFIG_CRASH_DUMP) || image->type != KEXEC_TYPE_CRASH)
 		return 0;
···
 	if (cpu_nodes > boot_cpu_node_count)
 		extra_size += (cpu_nodes - boot_cpu_node_count) * cpu_node_size();
 
+#ifdef CONFIG_CRASH_HOTPLUG
+	/*
+	 * Make sure enough space is reserved to accommodate possible CPU nodes
+	 * in the crash FDT. This allows packing possible CPU nodes which are
+	 * not yet present in the system without regenerating the entire FDT.
+	 */
+	if (image->type == KEXEC_TYPE_CRASH) {
+		possible_cpu_nodes = num_possible_cpus() / threads_per_core;
+		if (possible_cpu_nodes > cpu_nodes)
+			extra_size += (possible_cpu_nodes - cpu_nodes) * cpu_node_size();
+	}
+#endif
+
 	return extra_size;
 }
 
···
 		extra_size += (unsigned int)plpks_get_passwordlen();
 
 	return extra_size + kdump_extra_fdt_size_ppc64(image);
-}
-
-/**
- * add_node_props - Reads node properties from device node structure and add
- *                  them to fdt.
- * @fdt:            Flattened device tree of the kernel
- * @node_offset:    offset of the node to add a property at
- * @dn:             device node pointer
- *
- * Returns 0 on success, negative errno on error.
- */
-static int add_node_props(void *fdt, int node_offset, const struct device_node *dn)
-{
-	int ret = 0;
-	struct property *pp;
-
-	if (!dn)
-		return -EINVAL;
-
-	for_each_property_of_node(dn, pp) {
-		ret = fdt_setprop(fdt, node_offset, pp->name, pp->value, pp->length);
-		if (ret < 0) {
-			pr_err("Unable to add %s property: %s\n", pp->name, fdt_strerror(ret));
-			return ret;
-		}
-	}
-	return ret;
-}
-
-/**
- * update_cpus_node - Update cpus node of flattened device tree using of_root
- *                    device node.
- * @fdt:              Flattened device tree of the kernel.
- *
- * Returns 0 on success, negative errno on error.
- */
-static int update_cpus_node(void *fdt)
-{
-	struct device_node *cpus_node, *dn;
-	int cpus_offset, cpus_subnode_offset, ret = 0;
-
-	cpus_offset = fdt_path_offset(fdt, "/cpus");
-	if (cpus_offset < 0 && cpus_offset != -FDT_ERR_NOTFOUND) {
-		pr_err("Malformed device tree: error reading /cpus node: %s\n",
-		       fdt_strerror(cpus_offset));
-		return cpus_offset;
-	}
-
-	if (cpus_offset > 0) {
-		ret = fdt_del_node(fdt, cpus_offset);
-		if (ret < 0) {
-			pr_err("Error deleting /cpus node: %s\n", fdt_strerror(ret));
-			return -EINVAL;
-		}
-	}
-
-	/* Add cpus node to fdt */
-	cpus_offset = fdt_add_subnode(fdt, fdt_path_offset(fdt, "/"), "cpus");
-	if (cpus_offset < 0) {
-		pr_err("Error creating /cpus node: %s\n", fdt_strerror(cpus_offset));
-		return -EINVAL;
-	}
-
-	/* Add cpus node properties */
-	cpus_node = of_find_node_by_path("/cpus");
-	ret = add_node_props(fdt, cpus_offset, cpus_node);
-	of_node_put(cpus_node);
-	if (ret < 0)
-		return ret;
-
-	/* Loop through all subnodes of cpus and add them to fdt */
-	for_each_node_by_type(dn, "cpu") {
-		cpus_subnode_offset = fdt_add_subnode(fdt, cpus_offset, dn->full_name);
-		if (cpus_subnode_offset < 0) {
-			pr_err("Unable to add %s subnode: %s\n", dn->full_name,
-			       fdt_strerror(cpus_subnode_offset));
-			ret = cpus_subnode_offset;
-			goto out;
-		}
-
-		ret = add_node_props(fdt, cpus_subnode_offset, dn);
-		if (ret < 0)
-			goto out;
-	}
-out:
-	of_node_put(dn);
-	return ret;
 }
 
 static int copy_property(void *fdt, int node_offset, const struct device_node *dn,

arch/powerpc/kexec/ranges.c

···
 #include <linux/kexec.h>
 #include <linux/of.h>
 #include <linux/slab.h>
+#include <linux/memblock.h>
+#include <linux/crash_core.h>
 #include <asm/sections.h>
 #include <asm/kexec_ranges.h>
+#include <asm/crashdump-ppc64.h>
 
+#if defined(CONFIG_KEXEC_FILE) || defined(CONFIG_CRASH_DUMP)
 /**
  * get_max_nr_ranges - Get the max no. of ranges crash_mem structure
  *                     could hold, given the size allocated for it.
···
 	return __add_mem_range(mem_ranges, base, size);
 }
 
+#endif /* CONFIG_KEXEC_FILE || CONFIG_CRASH_DUMP */
+
+#ifdef CONFIG_KEXEC_FILE
 /**
  * add_tce_mem_ranges - Adds tce-table range to the given memory ranges list.
  * @mem_ranges:         Range list to add the memory range(s) to.
  *
  * Returns 0 on success, negative errno on error.
  */
-int add_tce_mem_ranges(struct crash_mem **mem_ranges)
+static int add_tce_mem_ranges(struct crash_mem **mem_ranges)
 {
 	struct device_node *dn = NULL;
 	int ret = 0;
···
  *
  * Returns 0 on success, negative errno on error.
  */
-int add_initrd_mem_range(struct crash_mem **mem_ranges)
+static int add_initrd_mem_range(struct crash_mem **mem_ranges)
 {
 	u64 base, end;
 	int ret;
···
 	return ret;
 }
 
-#ifdef CONFIG_PPC_64S_HASH_MMU
 /**
  * add_htab_mem_range - Adds htab range to the given memory ranges list,
  *                      if it exists
···
  *
  * Returns 0 on success, negative errno on error.
  */
-int add_htab_mem_range(struct crash_mem **mem_ranges)
+static int add_htab_mem_range(struct crash_mem **mem_ranges)
 {
+
+#ifdef CONFIG_PPC_64S_HASH_MMU
 	if (!htab_address)
 		return 0;
 
 	return add_mem_range(mem_ranges, __pa(htab_address), htab_size_bytes);
-}
+#else
+	return 0;
 #endif
+}
 
 /**
  * add_kernel_mem_range - Adds kernel text region to the given
···
  *
  * Returns 0 on success, negative errno on error.
  */
-int add_kernel_mem_range(struct crash_mem **mem_ranges)
+static int add_kernel_mem_range(struct crash_mem **mem_ranges)
 {
 	return add_mem_range(mem_ranges, 0, __pa(_end));
 }
+#endif /* CONFIG_KEXEC_FILE */
 
+#if defined(CONFIG_KEXEC_FILE) || defined(CONFIG_CRASH_DUMP)
 /**
  * add_rtas_mem_range - Adds RTAS region to the given memory ranges list.
  * @mem_ranges:         Range list to add the memory range to.
  *
  * Returns 0 on success, negative errno on error.
  */
-int add_rtas_mem_range(struct crash_mem **mem_ranges)
+static int add_rtas_mem_range(struct crash_mem **mem_ranges)
 {
 	struct device_node *dn;
 	u32 base, size;
···
  *
  * Returns 0 on success, negative errno on error.
  */
-int add_opal_mem_range(struct crash_mem **mem_ranges)
+static int add_opal_mem_range(struct crash_mem **mem_ranges)
 {
 	struct device_node *dn;
 	u64 base, size;
···
 	of_node_put(dn);
 	return ret;
 }
+#endif /* CONFIG_KEXEC_FILE || CONFIG_CRASH_DUMP */
 
+#ifdef CONFIG_KEXEC_FILE
 /**
  * add_reserved_mem_ranges - Adds "/reserved-ranges" regions exported by f/w
  *                           to the given memory ranges list.
···
  *
  * Returns 0 on success, negative errno on error.
  */
-int add_reserved_mem_ranges(struct crash_mem **mem_ranges)
+static int add_reserved_mem_ranges(struct crash_mem **mem_ranges)
 {
 	int n_mem_addr_cells, n_mem_size_cells, i, len, cells, ret = 0;
 	struct device_node *root = of_find_node_by_path("/");
···
 
 	return ret;
 }
+
+/**
+ * get_reserved_memory_ranges - Get reserve memory ranges. This list includes
+ *                              memory regions that should be added to the
+ *                              memory reserve map to ensure the region is
+ *                              protected from any mischief.
+ * @mem_ranges:                 Range list to add the memory ranges to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int get_reserved_memory_ranges(struct crash_mem **mem_ranges)
+{
+	int ret;
+
+	ret = add_rtas_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_tce_mem_ranges(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_reserved_mem_ranges(mem_ranges);
+out:
+	if (ret)
+		pr_err("Failed to setup reserved memory ranges\n");
+	return ret;
+}
+
+/**
+ * get_exclude_memory_ranges - Get exclude memory ranges. This list includes
+ *                             regions like opal/rtas, tce-table, initrd,
+ *                             kernel, htab which should be avoided while
+ *                             setting up kexec load segments.
+ * @mem_ranges:                Range list to add the memory ranges to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int get_exclude_memory_ranges(struct crash_mem **mem_ranges)
+{
+	int ret;
+
+	ret = add_tce_mem_ranges(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_initrd_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_htab_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_kernel_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_rtas_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_opal_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_reserved_mem_ranges(mem_ranges);
+	if (ret)
+		goto out;
+
+	/* exclude memory ranges should be sorted for easy lookup */
+	sort_memory_ranges(*mem_ranges, true);
+out:
+	if (ret)
+		pr_err("Failed to setup exclude memory ranges\n");
+	return ret;
+}
+
+#ifdef CONFIG_CRASH_DUMP
+/**
+ * get_usable_memory_ranges - Get usable memory ranges. This list includes
+ *                            regions like crashkernel, opal/rtas & tce-table,
+ *                            that kdump kernel could use.
+ * @mem_ranges:               Range list to add the memory ranges to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int get_usable_memory_ranges(struct crash_mem **mem_ranges)
+{
+	int ret;
+
+	/*
+	 * Early boot failure observed on guests when low memory (first memory
+	 * block?) is not added to usable memory. So, add [0, crashk_res.end]
+	 * instead of [crashk_res.start, crashk_res.end] to workaround it.
+	 * Also, crashed kernel's memory must be added to reserve map to
+	 * avoid kdump kernel from using it.
+	 */
+	ret = add_mem_range(mem_ranges, 0, crashk_res.end + 1);
+	if (ret)
+		goto out;
+
+	ret = add_rtas_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_opal_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_tce_mem_ranges(mem_ranges);
+out:
+	if (ret)
+		pr_err("Failed to setup usable memory ranges\n");
+	return ret;
+}
+#endif /* CONFIG_CRASH_DUMP */
+#endif /* CONFIG_KEXEC_FILE */
+
+#ifdef CONFIG_CRASH_DUMP
+/**
+ * get_crash_memory_ranges - Get crash memory ranges. This list includes
+ *                           first/crashing kernel's memory regions that
+ *                           would be exported via an elfcore.
+ * @mem_ranges:              Range list to add the memory ranges to.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int get_crash_memory_ranges(struct crash_mem **mem_ranges)
+{
+	phys_addr_t base, end;
+	struct crash_mem *tmem;
+	u64 i;
+	int ret;
+
+	for_each_mem_range(i, &base, &end) {
+		u64 size = end - base;
+
+		/* Skip backup memory region, which needs a separate entry */
+		if (base == BACKUP_SRC_START) {
+			if (size > BACKUP_SRC_SIZE) {
+				base = BACKUP_SRC_END + 1;
+				size -= BACKUP_SRC_SIZE;
+			} else
+				continue;
+		}
+
+		ret = add_mem_range(mem_ranges, base, size);
+		if (ret)
+			goto out;
+
+		/* Try merging adjacent ranges before reallocation attempt */
+		if ((*mem_ranges)->nr_ranges == (*mem_ranges)->max_nr_ranges)
+			sort_memory_ranges(*mem_ranges, true);
+	}
+
+	/* Reallocate memory ranges if there is no space to split ranges */
+	tmem = *mem_ranges;
+	if (tmem && (tmem->nr_ranges == tmem->max_nr_ranges)) {
+		tmem = realloc_mem_ranges(mem_ranges);
+		if (!tmem)
+			goto out;
+	}
+
+	/* Exclude crashkernel region */
+	ret = crash_exclude_mem_range(tmem, crashk_res.start, crashk_res.end);
+	if (ret)
+		goto out;
+
+	/*
+	 * FIXME: For now, stay in parity with kexec-tools but if RTAS/OPAL
+	 *        regions are exported to save their context at the time of
+	 *        crash, they should actually be backed up just like the
+	 *        first 64K bytes of memory.
+	 */
+	ret = add_rtas_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	ret = add_opal_mem_range(mem_ranges);
+	if (ret)
+		goto out;
+
+	/* create a separate program header for the backup region */
+	ret = add_mem_range(mem_ranges, BACKUP_SRC_START, BACKUP_SRC_SIZE);
+	if (ret)
+		goto out;
+
+	sort_memory_ranges(*mem_ranges, false);
+out:
+	if (ret)
+		pr_err("Failed to setup crash memory ranges\n");
+	return ret;
+}
+
+/**
+ * remove_mem_range - Removes the given memory range from the range list.
+ * @mem_ranges:    Range list to remove the memory range to.
+ * @base:          Base address of the range to remove.
+ * @size:          Size of the memory range to remove.
+ *
+ * (Re)allocates memory, if needed.
+ *
+ * Returns 0 on success, negative errno on error.
+ */
+int remove_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size)
+{
+	u64 end;
+	int ret = 0;
+	unsigned int i;
+	u64 mstart, mend;
+	struct crash_mem *mem_rngs = *mem_ranges;
+
+	if (!size)
+		return 0;
+
+	/*
+	 * Memory range are stored as start and end address, use
+	 * the same format to do remove operation.
+	 */
+	end = base + size - 1;
+
+	for (i = 0; i < mem_rngs->nr_ranges; i++) {
+		mstart = mem_rngs->ranges[i].start;
+		mend = mem_rngs->ranges[i].end;
+
+		/*
+		 * Memory range to remove is not part of this range entry
+		 * in the memory range list
+		 */
+		if (!(base >= mstart && end <= mend))
+			continue;
+
+		/*
+		 * Memory range to remove is equivalent to this entry in the
+		 * memory range list. Remove the range entry from the list.
+		 */
+		if (base == mstart && end == mend) {
+			for (; i < mem_rngs->nr_ranges - 1; i++) {
+				mem_rngs->ranges[i].start = mem_rngs->ranges[i+1].start;
+				mem_rngs->ranges[i].end = mem_rngs->ranges[i+1].end;
+			}
+			mem_rngs->nr_ranges--;
+			goto out;
+		}
+		/*
+		 * Start address of the memory range to remove and the
+		 * current memory range entry in the list is same. Just
+		 * move the start address of the current memory range
+		 * entry in the list to end + 1.
+		 */
+		else if (base == mstart) {
+			mem_rngs->ranges[i].start = end + 1;
+			goto out;
+		}
+		/*
+		 * End address of the memory range to remove and the
+		 * current memory range entry in the list is same.
+		 * Just move the end address of the current memory
+		 * range entry in the list to base - 1.
+		 */
+		else if (end == mend)  {
+			mem_rngs->ranges[i].end = base - 1;
+			goto out;
+		}
+		/*
+		 * Memory range to remove is not at the edge of current
+		 * memory range entry. Split the current memory entry into
+		 * two half.
+		 */
+		else {
+			mem_rngs->ranges[i].end = base - 1;
+			size = mem_rngs->ranges[i].end - end;
+			ret = add_mem_range(mem_ranges, end + 1, size);
+		}
+	}
+out:
+	return ret;
+}
+#endif /* CONFIG_CRASH_DUMP */

arch/powerpc/kvm/book3s.c

···
 		break;
 	}
 
-#if 0
-	printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
-#endif
-
 	if (deliver)
 		kvmppc_inject_interrupt(vcpu, vec, 0);
 

arch/powerpc/kvm/book3s_emulate.c

···
 	case SPRN_HID1:
 		to_book3s(vcpu)->hid[1] = spr_val;
 		break;
-	case SPRN_HID2:
+	case SPRN_HID2_750FX:
 		to_book3s(vcpu)->hid[2] = spr_val;
 		break;
 	case SPRN_HID2_GEKKO:
···
 	case SPRN_HID1:
 		*spr_val = to_book3s(vcpu)->hid[1];
 		break;
-	case SPRN_HID2:
+	case SPRN_HID2_750FX:
 	case SPRN_HID2_GEKKO:
 		*spr_val = to_book3s(vcpu)->hid[2];
 		break;

arch/powerpc/kvm/book3s_hv.c

···
 	 * entering a nested guest in which case the decrementer is now owned
 	 * by L2 and the L1 decrementer is provided in hdec_expires
 	 */
-	if (!kvmhv_is_nestedv2() && kvmppc_core_pending_dec(vcpu) &&
+	if (kvmppc_core_pending_dec(vcpu) &&
 			((tb < kvmppc_dec_expires_host_tb(vcpu)) ||
 			 (trap == BOOK3S_INTERRUPT_SYSCALL &&
 			  kvmppc_get_gpr(vcpu, 3) == H_ENTER_NESTED)))

arch/powerpc/kvm/book3s_hv_nestedv2.c

···
 	}
 
 	if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_OUTPUT)) {
-		kvmppc_gse_put_buff_info(gsb, KVMPPC_GSID_RUN_OUTPUT,
-					 cfg->vcpu_run_output_cfg);
+		rc = kvmppc_gse_put_buff_info(gsb, KVMPPC_GSID_RUN_OUTPUT,
+					      cfg->vcpu_run_output_cfg);
 		if (rc < 0)
 			return rc;
 	}

arch/powerpc/kvm/book3s_xive.c

···
 	xc->cppr = xive_prio_from_guest(new_cppr);
 
 	/*
-	 * IPIs are synthetized from MFRR and thus don't need
+	 * IPIs are synthesized from MFRR and thus don't need
 	 * any special EOI handling. The underlying interrupt
 	 * used to signal MFRR changes is EOId when fetched from
 	 * the queue.

arch/powerpc/lib/Makefile

···
 # Makefile for ppc-specific library files..
 #
 
-ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
-
 CFLAGS_code-patching.o += -fno-stack-protector
 CFLAGS_feature-fixups.o += -fno-stack-protector
 

arch/powerpc/lib/code-patching.c

···
 }
 NOKPROBE_SYMBOL(patch_instruction);
 
+static int patch_memset64(u64 *addr, u64 val, size_t count)
+{
+	for (u64 *end = addr + count; addr < end; addr++)
+		__put_kernel_nofault(addr, &val, u64, failed);
+
+	return 0;
+
+failed:
+	return -EPERM;
+}
+
+static int patch_memset32(u32 *addr, u32 val, size_t count)
+{
+	for (u32 *end = addr + count; addr < end; addr++)
+		__put_kernel_nofault(addr, &val, u32, failed);
+
+	return 0;
+
+failed:
+	return -EPERM;
+}
+
 static int __patch_instructions(u32 *patch_addr, u32 *code, size_t len, bool repeat_instr)
 {
 	unsigned long start = (unsigned long)patch_addr;
+	int err;
 
 	/* Repeat instruction */
 	if (repeat_instr) {
···
 		if (ppc_inst_prefixed(instr)) {
 			u64 val = ppc_inst_as_ulong(instr);
 
-			memset64((u64 *)patch_addr, val, len / 8);
+			err = patch_memset64((u64 *)patch_addr, val, len / 8);
 		} else {
 			u32 val = ppc_inst_val(instr);
 
-			memset32(patch_addr, val, len / 4);
+			err = patch_memset32(patch_addr, val, len / 4);
 		}
 	} else {
-		memcpy(patch_addr, code, len);
+		err = copy_to_kernel_nofault(patch_addr, code, len);
 	}
 
 	smp_wmb();	/* smp write barrier */
 	flush_icache_range(start, start + len);
-	return 0;
+	return err;
 }
 
 /*

arch/powerpc/lib/feature-fixups.c

···
 #include <asm/firmware.h>
 #include <asm/inst.h>
 
+/*
+ * Used to generate warnings if mmu or cpu feature check functions that
+ * use static keys before they are initialized.
+ */
+bool static_key_feature_checks_initialized __read_mostly;
+EXPORT_SYMBOL_GPL(static_key_feature_checks_initialized);
+
 struct fixup_entry {
 	unsigned long	mask;
 	unsigned long	value;
···
 	jump_label_init();
 	cpu_feature_keys_init();
 	mmu_feature_keys_init();
+	static_key_feature_checks_initialized = true;
 }
 
 static int __init check_features(void)

arch/powerpc/lib/test-code-patching.c

···
 	check(!memcmp(iptr, expected, sizeof(expected)));
 }
 
+static void __init test_multi_instruction_patching(void)
+{
+	u32 code[32];
+	void *buf;
+	u32 *addr32;
+	u64 *addr64;
+	ppc_inst_t inst64 = ppc_inst_prefix(OP_PREFIX << 26 | 3UL << 24, PPC_RAW_TRAP());
+	u32 inst32 = PPC_RAW_NOP();
+
+	buf = vzalloc(PAGE_SIZE * 8);
+	check(buf);
+	if (!buf)
+		return;
+
+	/* Test single page 32-bit repeated instruction */
+	addr32 = buf + PAGE_SIZE;
+	check(!patch_instructions(addr32 + 1, &inst32, 12, true));
+
+	check(addr32[0] == 0);
+	check(addr32[1] == inst32);
+	check(addr32[2] == inst32);
+	check(addr32[3] == inst32);
+	check(addr32[4] == 0);
+
+	/* Test single page 64-bit repeated instruction */
+	if (IS_ENABLED(CONFIG_PPC64)) {
+		check(ppc_inst_prefixed(inst64));
+
+		addr64 = buf + PAGE_SIZE * 2;
+		ppc_inst_write(code, inst64);
+		check(!patch_instructions((u32 *)(addr64 + 1), code, 24, true));
+
+		check(addr64[0] == 0);
+		check(ppc_inst_equal(ppc_inst_read((u32 *)&addr64[1]), inst64));
+		check(ppc_inst_equal(ppc_inst_read((u32 *)&addr64[2]), inst64));
+		check(ppc_inst_equal(ppc_inst_read((u32 *)&addr64[3]), inst64));
+		check(addr64[4] == 0);
+	}
+
+	/* Test single page memcpy */
+	addr32 = buf + PAGE_SIZE * 3;
+
+	for (int i = 0; i < ARRAY_SIZE(code); i++)
+		code[i] = i + 1;
+
+	check(!patch_instructions(addr32 + 1, code, sizeof(code), false));
+
+	check(addr32[0] == 0);
+	check(!memcmp(&addr32[1], code, sizeof(code)));
+	check(addr32[ARRAY_SIZE(code) + 1] == 0);
+
+	/* Test multipage 32-bit repeated instruction */
+	addr32 = buf + PAGE_SIZE * 4 - 8;
+	check(!patch_instructions(addr32 + 1, &inst32, 12, true));
+
+	check(addr32[0] == 0);
+	check(addr32[1] == inst32);
+	check(addr32[2] == inst32);
+	check(addr32[3] == inst32);
+	check(addr32[4] == 0);
+
+	/* Test multipage 64-bit repeated instruction */
+	if (IS_ENABLED(CONFIG_PPC64)) {
+		check(ppc_inst_prefixed(inst64));
+
+		addr64 = buf + PAGE_SIZE * 5 - 8;
+		ppc_inst_write(code, inst64);
+		check(!patch_instructions((u32 *)(addr64 + 1), code, 24, true));
+
+		check(addr64[0] == 0);
+		check(ppc_inst_equal(ppc_inst_read((u32 *)&addr64[1]), inst64));
+		check(ppc_inst_equal(ppc_inst_read((u32 *)&addr64[2]), inst64));
+		check(ppc_inst_equal(ppc_inst_read((u32 *)&addr64[3]), inst64));
+		check(addr64[4] == 0);
+	}
+
+	/* Test multipage memcpy */
+	addr32 = buf + PAGE_SIZE * 6 - 12;
+
+	for (int i = 0; i < ARRAY_SIZE(code); i++)
+		code[i] = i + 1;
+
+	check(!patch_instructions(addr32 + 1, code, sizeof(code), false));
+
+	check(addr32[0] == 0);
+	check(!memcmp(&addr32[1], code, sizeof(code)));
+	check(addr32[ARRAY_SIZE(code) + 1] == 0);
+
+	vfree(buf);
+}
+
 static int __init test_code_patching(void)
 {
 	pr_info("Running code patching self-tests ...\n");
···
 	test_create_function_call();
 	test_translate_branch();
 	test_prefixed_patching();
+	test_multi_instruction_patching();
 
 	return 0;
 }

arch/powerpc/mm/Makefile

···
 # Makefile for the linux ppc-specific parts of the memory manager.
 #
 
-ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
-
 obj-y				:= fault.o mem.o pgtable.o maccess.o pageattr.o \
 				   init_$(BITS).o pgtable_$(BITS).o \
 				   pgtable-frag.o ioremap.o ioremap_$(BITS).o \

arch/powerpc/mm/book3s64/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
 
-ccflags-y	:= $(NO_MINIMAL_TOC)
-
 obj-y				+= mmu_context.o pgtable.o trace.o
 ifdef CONFIG_PPC_64S_HASH_MMU
 CFLAGS_REMOVE_slb.o = $(CC_FLAGS_FTRACE)

arch/powerpc/mm/cacheflush.c

···
 
 #ifdef CONFIG_HIGHMEM
 /**
- * flush_dcache_icache_phys() - Flush a page by it's physical address
+ * flush_dcache_icache_phys() - Flush a page by its physical address
  * @physaddr: the physical address of the page
  */
 static void flush_dcache_icache_phys(unsigned long physaddr)

arch/powerpc/mm/kasan/init_book3e_64.c

···
 	pte_t zero_pte = pfn_pte(virt_to_pfn(kasan_early_shadow_page), PAGE_KERNEL_RO);
 
 	for_each_mem_range(i, &start, &end)
-		kasan_init_phys_region((void *)start, (void *)end);
+		kasan_init_phys_region(phys_to_virt(start), phys_to_virt(end));
 
 	if (IS_ENABLED(CONFIG_KASAN_VMALLOC))
 		kasan_remove_zero_shadow((void *)VMALLOC_START, VMALLOC_SIZE);

arch/powerpc/mm/kasan/init_book3s_64.c

···
 	}
 
 	for_each_mem_range(i, &start, &end)
-		kasan_init_phys_region((void *)start, (void *)end);
+		kasan_init_phys_region(phys_to_virt(start), phys_to_virt(end));
 
 	for (i = 0; i < PTRS_PER_PTE; i++)
 		__set_pte_at(&init_mm, (unsigned long)kasan_early_shadow_page,

arch/powerpc/mm/mem.c

···
 
 #include <mm/mmu_decl.h>
 
-unsigned long long memory_limit;
+unsigned long long memory_limit __initdata;
 
 unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] __page_aligned_bss;
 EXPORT_SYMBOL(empty_zero_page);

arch/powerpc/mm/nohash/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
 
-ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
-
 obj-y				+= mmu_context.o tlb.o tlb_low.o kup.o
 obj-$(CONFIG_PPC_BOOK3E_64)  	+= tlb_low_64e.o book3e_pgtable.o
 obj-$(CONFIG_40x)		+= 40x.o

arch/powerpc/mm/nohash/kaslr_booke.c

···
 		create_kaslr_tlb_entry(1, tlb_virt, tlb_phys);
 	}
 
-	/* Copy the kernel to it's new location and run */
+	/* Copy the kernel to its new location and run */
 	memcpy((void *)kernstart_virt_addr, (void *)_stext, kernel_sz);
 	flush_icache_range(kernstart_virt_addr, kernstart_virt_addr + kernel_sz);
 

arch/powerpc/mm/ptdump/hashpagetable.c

···
 	 * Traverse the vmemmaped memory and dump pages that are in the hash
 	 * pagetable.
 	 */
-	while (ptr->list) {
+	while (ptr) {
 		hpte_find(st, ptr->virt_addr, mmu_vmemmap_psize);
 		ptr = ptr->list;
 	}

arch/powerpc/net/bpf_jit_comp.c

···
 
 	bpf_prog_unlock_free(fp);
 }
+
+bool bpf_jit_supports_kfunc_call(void)
+{
+	return true;
+}
+
+bool bpf_jit_supports_far_kfunc_call(void)
+{
+	return IS_ENABLED(CONFIG_PPC64);
+}

arch/powerpc/net/bpf_jit_comp32.c

···
 			}
 			break;
 		case BPF_ALU | BPF_DIV | BPF_X: /* (u32) dst /= (u32) src */
-			EMIT(PPC_RAW_DIVWU(dst_reg, src2_reg, src_reg));
+			if (off)
+				EMIT(PPC_RAW_DIVW(dst_reg, src2_reg, src_reg));
+			else
+				EMIT(PPC_RAW_DIVWU(dst_reg, src2_reg, src_reg));
 			break;
 		case BPF_ALU | BPF_MOD | BPF_X: /* (u32) dst %= (u32) src */
-			EMIT(PPC_RAW_DIVWU(_R0, src2_reg, src_reg));
+			if (off)
+				EMIT(PPC_RAW_DIVW(_R0, src2_reg, src_reg));
+			else
+				EMIT(PPC_RAW_DIVWU(_R0, src2_reg, src_reg));
 			EMIT(PPC_RAW_MULW(_R0, src_reg, _R0));
 			EMIT(PPC_RAW_SUB(dst_reg, src2_reg, _R0));
 			break;
···
 			if (imm == 1) {
 				EMIT(PPC_RAW_MR(dst_reg, src2_reg));
 			} else if (is_power_of_2((u32)imm)) {
-				EMIT(PPC_RAW_SRWI(dst_reg, src2_reg, ilog2(imm)));
+				if (off)
+					EMIT(PPC_RAW_SRAWI(dst_reg, src2_reg, ilog2(imm)));
+				else
+					EMIT(PPC_RAW_SRWI(dst_reg, src2_reg, ilog2(imm)));
 			} else {
 				PPC_LI32(_R0, imm);
-				EMIT(PPC_RAW_DIVWU(dst_reg, src2_reg, _R0));
+				if (off)
+					EMIT(PPC_RAW_DIVW(dst_reg, src2_reg, _R0));
+				else
+					EMIT(PPC_RAW_DIVWU(dst_reg, src2_reg, _R0));
 			}
 			break;
 		case BPF_ALU | BPF_MOD | BPF_K: /* (u32) dst %= (u32) imm */
···
 			if (!is_power_of_2((u32)imm)) {
 				bpf_set_seen_register(ctx, tmp_reg);
 				PPC_LI32(tmp_reg, imm);
-				EMIT(PPC_RAW_DIVWU(_R0, src2_reg, tmp_reg));
+				if (off)
+					EMIT(PPC_RAW_DIVW(_R0, src2_reg, tmp_reg));
+				else
+					EMIT(PPC_RAW_DIVWU(_R0, src2_reg, tmp_reg));
 				EMIT(PPC_RAW_MULW(_R0, tmp_reg, _R0));
 				EMIT(PPC_RAW_SUB(dst_reg, src2_reg, _R0));
 			} else if (imm == 1) {
 				EMIT(PPC_RAW_LI(dst_reg, 0));
+			} else if (off) {
+				EMIT(PPC_RAW_SRAWI(_R0, src2_reg, ilog2(imm)));
+				EMIT(PPC_RAW_ADDZE(_R0, _R0));
+				EMIT(PPC_RAW_SLWI(_R0, _R0, ilog2(imm)));
+				EMIT(PPC_RAW_SUB(dst_reg, src2_reg, _R0));
 			} else {
 				imm = ilog2((u32)imm);
 				EMIT(PPC_RAW_RLWINM(dst_reg, src2_reg, 0, 32 - imm, 31));
···
 				imm = -imm;
 			if (!is_power_of_2(imm))
 				return -EOPNOTSUPP;
-			if (imm == 1)
+			if (imm == 1) {
 				EMIT(PPC_RAW_LI(dst_reg, 0));
-			else
+				EMIT(PPC_RAW_LI(dst_reg_h, 0));
+			} else if (off) {
+				EMIT(PPC_RAW_SRAWI(dst_reg_h, src2_reg_h, 31));
+				EMIT(PPC_RAW_XOR(dst_reg, src2_reg, dst_reg_h));
+				EMIT(PPC_RAW_SUBFC(dst_reg, dst_reg_h, dst_reg));
+				EMIT(PPC_RAW_RLWINM(dst_reg, dst_reg, 0, 32 - ilog2(imm), 31));
+				EMIT(PPC_RAW_XOR(dst_reg, dst_reg, dst_reg_h));
+				EMIT(PPC_RAW_SUBFC(dst_reg, dst_reg_h, dst_reg));
+				EMIT(PPC_RAW_SUBFE(dst_reg_h, dst_reg_h, dst_reg_h));
+			} else {
 				EMIT(PPC_RAW_RLWINM(dst_reg, src2_reg, 0, 32 - ilog2(imm), 31));
-			EMIT(PPC_RAW_LI(dst_reg_h, 0));
+				EMIT(PPC_RAW_LI(dst_reg_h, 0));
+			}
 			break;
 		case BPF_ALU64 | BPF_DIV | BPF_K: /* dst /= imm */
 			if (!imm)
···
 		 * MOV
 		 */
 		case BPF_ALU64 | BPF_MOV | BPF_X: /* dst = src */
-			if (dst_reg == src_reg)
-				break;
-			EMIT(PPC_RAW_MR(dst_reg, src_reg));
-			EMIT(PPC_RAW_MR(dst_reg_h, src_reg_h));
+			if (off == 8) {
+				EMIT(PPC_RAW_EXTSB(dst_reg, src_reg));
+				EMIT(PPC_RAW_SRAWI(dst_reg_h, dst_reg, 31));
+			} else if (off == 16) {
+				EMIT(PPC_RAW_EXTSH(dst_reg, src_reg));
+				EMIT(PPC_RAW_SRAWI(dst_reg_h, dst_reg, 31));
+			} else if (off == 32 && dst_reg == src_reg) {
+				EMIT(PPC_RAW_SRAWI(dst_reg_h, src_reg, 31));
+			} else if (off == 32) {
+				EMIT(PPC_RAW_MR(dst_reg, src_reg));
+				EMIT(PPC_RAW_SRAWI(dst_reg_h, src_reg, 31));
+			} else if (dst_reg != src_reg) {
+				EMIT(PPC_RAW_MR(dst_reg, src_reg));
+				EMIT(PPC_RAW_MR(dst_reg_h, src_reg_h));
+			}
 			break;
 		case BPF_ALU | BPF_MOV | BPF_X: /* (u32) dst = src */
 			/* special mov32 for zext */
 			if (imm == 1)
 				EMIT(PPC_RAW_LI(dst_reg_h, 0));
+			else if (off == 8)
+				EMIT(PPC_RAW_EXTSB(dst_reg, src_reg));
+			else if (off == 16)
+				EMIT(PPC_RAW_EXTSH(dst_reg, src_reg));
 			else if (dst_reg != src_reg)
 				EMIT(PPC_RAW_MR(dst_reg, src_reg));
 			break;
···
 		 * BPF_FROM_BE/LE
 		 */
 		case BPF_ALU | BPF_END | BPF_FROM_LE:
+		case BPF_ALU64 | BPF_END | BPF_FROM_LE:
 			switch (imm) {
 			case 16:
 				/* Copy 16 bits to upper part */
···
 				EMIT(PPC_RAW_MR(dst_reg_h, tmp_reg));
 				break;
 			}
+			if (BPF_CLASS(code) == BPF_ALU64 && imm != 64)
+				EMIT(PPC_RAW_LI(dst_reg_h, 0));
 			break;
 		case BPF_ALU | BPF_END | BPF_FROM_BE:
 			switch (imm) {
···
 		 * BPF_LDX
 		 */
 		case BPF_LDX | BPF_MEM | BPF_B: /* dst = *(u8 *)(ul) (src + off) */
+		case BPF_LDX | BPF_MEMSX | BPF_B:
 		case BPF_LDX | BPF_PROBE_MEM | BPF_B:
+		case BPF_LDX | BPF_PROBE_MEMSX | BPF_B:
 		case BPF_LDX | BPF_MEM | BPF_H: /* dst = *(u16 *)(ul) (src + off) */
+		case BPF_LDX | BPF_MEMSX | BPF_H:
 		case BPF_LDX | BPF_PROBE_MEM | BPF_H:
+		case BPF_LDX | BPF_PROBE_MEMSX | BPF_H:
 		case BPF_LDX | BPF_MEM | BPF_W: /* dst = *(u32 *)(ul) (src + off) */
+		case BPF_LDX | BPF_MEMSX | BPF_W:
 		case BPF_LDX | BPF_PROBE_MEM | BPF_W:
+		case BPF_LDX | BPF_PROBE_MEMSX | BPF_W:
 		case BPF_LDX | BPF_MEM | BPF_DW: /* dst = *(u64 *)(ul) (src + off) */
 		case BPF_LDX | BPF_PROBE_MEM | BPF_DW:
 			/*
···
 			 * load only if addr is kernel address (see is_kernel_addr()), otherwise
 			 * set dst_reg=0 and move on.
 			 */
-			if (BPF_MODE(code) == BPF_PROBE_MEM) {
+			if (BPF_MODE(code) == BPF_PROBE_MEM || BPF_MODE(code) == BPF_PROBE_MEMSX) {
 				PPC_LI32(_R0, TASK_SIZE - off);
 				EMIT(PPC_RAW_CMPLW(src_reg, _R0));
 				PPC_BCC_SHORT(COND_GT, (ctx->idx + 4) * 4);
···
 				 * as there are two load instructions for dst_reg_h & dst_reg
 				 * respectively.
 				 */
-				if (size == BPF_DW)
+				if (size == BPF_DW ||
+				    (size == BPF_B && BPF_MODE(code) == BPF_PROBE_MEMSX))
 					PPC_JMP((ctx->idx + 3) * 4);
 				else
 					PPC_JMP((ctx->idx + 2) * 4);
 			}
 
-			switch (size) {
-			case BPF_B:
-				EMIT(PPC_RAW_LBZ(dst_reg, src_reg, off));
-				break;
-			case BPF_H:
-				EMIT(PPC_RAW_LHZ(dst_reg, src_reg, off));
-				break;
-			case BPF_W:
-				EMIT(PPC_RAW_LWZ(dst_reg, src_reg, off));
-				break;
-			case BPF_DW:
-				EMIT(PPC_RAW_LWZ(dst_reg_h, src_reg, off));
-				EMIT(PPC_RAW_LWZ(dst_reg, src_reg, off + 4));
-				break;
-			}
+			if (BPF_MODE(code) == BPF_MEMSX || BPF_MODE(code) == BPF_PROBE_MEMSX) {
+				switch (size) {
+				case BPF_B:
+					EMIT(PPC_RAW_LBZ(dst_reg, src_reg, off));
+					EMIT(PPC_RAW_EXTSB(dst_reg, dst_reg));
+					break;
+				case BPF_H:
+					EMIT(PPC_RAW_LHA(dst_reg, src_reg, off));
+					break;
+				case BPF_W:
+					EMIT(PPC_RAW_LWZ(dst_reg, src_reg, off));
+					break;
+				}
+				if (!fp->aux->verifier_zext)
+					EMIT(PPC_RAW_SRAWI(dst_reg_h, dst_reg, 31));
 
-			if (size != BPF_DW && !fp->aux->verifier_zext)
-				EMIT(PPC_RAW_LI(dst_reg_h, 0));
+			} else {
+				switch (size) {
+				case BPF_B:
+					EMIT(PPC_RAW_LBZ(dst_reg, src_reg, off));
+					break;
+				case BPF_H:
+					EMIT(PPC_RAW_LHZ(dst_reg, src_reg, off));
+					break;
+				case BPF_W:
+					EMIT(PPC_RAW_LWZ(dst_reg, src_reg, off));
+					break;
+				case BPF_DW:
+					EMIT(PPC_RAW_LWZ(dst_reg_h, src_reg, off));
+					EMIT(PPC_RAW_LWZ(dst_reg, src_reg, off + 4));
+					break;
+				}
+				if (size != BPF_DW && !fp->aux->verifier_zext)
+					EMIT(PPC_RAW_LI(dst_reg_h, 0));
+			}
 
 			if (BPF_MODE(code) == BPF_PROBE_MEM) {
 				int insn_idx = ctx->idx - 1;
···
 		 */
 		case BPF_JMP | BPF_JA:
 			PPC_JMP(addrs[i + 1 + off]);
+			break;
+		case BPF_JMP32 | BPF_JA:
+			PPC_JMP(addrs[i + 1 + imm]);
 			break;
 
 		case BPF_JMP | BPF_JGT | BPF_K:

arch/powerpc/net/bpf_jit_comp64.c

···
 	EMIT(PPC_RAW_BLR());
 }
 
-static int bpf_jit_emit_func_call_hlp(u32 *image, struct codegen_context *ctx, u64 func)
+static int
+bpf_jit_emit_func_call_hlp(u32 *image, u32 *fimage, struct codegen_context *ctx, u64 func)
 {
 	unsigned long func_addr = func ? ppc_function_entry((void *)func) : 0;
 	long reladdr;
 
-	if (WARN_ON_ONCE(!core_kernel_text(func_addr)))
+	if (WARN_ON_ONCE(!kernel_text_address(func_addr)))
 		return -EINVAL;
 
-	if (IS_ENABLED(CONFIG_PPC_KERNEL_PCREL)) {
-		reladdr = func_addr - CTX_NIA(ctx);
+#ifdef CONFIG_PPC_KERNEL_PCREL
+	reladdr = func_addr - local_paca->kernelbase;
 
-		if (reladdr >= (long)SZ_8G || reladdr < -(long)SZ_8G) {
-			pr_err("eBPF: address of %ps out of range of pcrel address.\n",
-				(void *)func);
-			return -ERANGE;
-		}
-		/* pla r12,addr */
-		EMIT(PPC_PREFIX_MLS | __PPC_PRFX_R(1) | IMM_H18(reladdr));
-		EMIT(PPC_INST_PADDI | ___PPC_RT(_R12) | IMM_L(reladdr));
-		EMIT(PPC_RAW_MTCTR(_R12));
-		EMIT(PPC_RAW_BCTR());
-
+	if (reladdr < (long)SZ_8G && reladdr >= -(long)SZ_8G) {
+		EMIT(PPC_RAW_LD(_R12, _R13, offsetof(struct paca_struct, kernelbase)));
+		/* Align for subsequent prefix instruction */
+		if (!IS_ALIGNED((unsigned long)fimage + CTX_NIA(ctx), 8))
+			EMIT(PPC_RAW_NOP());
+		/* paddi r12,r12,addr */
+		EMIT(PPC_PREFIX_MLS | __PPC_PRFX_R(0) | IMM_H18(reladdr));
+		EMIT(PPC_INST_PADDI | ___PPC_RT(_R12) | ___PPC_RA(_R12) | IMM_L(reladdr));
 	} else {
+		unsigned long pc = (unsigned long)fimage + CTX_NIA(ctx);
+		bool alignment_needed = !IS_ALIGNED(pc, 8);
+
+		reladdr = func_addr - (alignment_needed ? pc + 4 :  pc);
+
+		if (reladdr < (long)SZ_8G && reladdr >= -(long)SZ_8G) {
+			if (alignment_needed)
+				EMIT(PPC_RAW_NOP());
+			/* pla r12,addr */
+			EMIT(PPC_PREFIX_MLS | __PPC_PRFX_R(1) | IMM_H18(reladdr));
+			EMIT(PPC_INST_PADDI | ___PPC_RT(_R12) | IMM_L(reladdr));
+		} else {
+			/* We can clobber r12 */
+			PPC_LI64(_R12, func);
+		}
+	}
+	EMIT(PPC_RAW_MTCTR(_R12));
+	EMIT(PPC_RAW_BCTRL());
+#else
+	if (core_kernel_text(func_addr)) {
 		reladdr = func_addr - kernel_toc_addr();
 		if (reladdr > 0x7FFFFFFF || reladdr < -(0x80000000L)) {
 			pr_err("eBPF: address of %ps out of range of kernel_toc.\n", (void *)func);
···
 		EMIT(PPC_RAW_ADDI(_R12, _R12, PPC_LO(reladdr)));
 		EMIT(PPC_RAW_MTCTR(_R12));
 		EMIT(PPC_RAW_BCTRL());
+	} else {
+		if (IS_ENABLED(CONFIG_PPC64_ELF_ABI_V1)) {
+			/* func points to the function descriptor */
+			PPC_LI64(bpf_to_ppc(TMP_REG_2), func);
+			/* Load actual entry point from function descriptor */
+			EMIT(PPC_RAW_LD(bpf_to_ppc(TMP_REG_1), bpf_to_ppc(TMP_REG_2), 0));
+			/* ... and move it to CTR */
+			EMIT(PPC_RAW_MTCTR(bpf_to_ppc(TMP_REG_1)));
+			/*
+			 * Load TOC from function descriptor at offset 8.
+			 * We can clobber r2 since we get called through a
+			 * function pointer (so caller will save/restore r2).
+			 */
+			EMIT(PPC_RAW_LD(_R2, bpf_to_ppc(TMP_REG_2), 8));
+		} else {
+			PPC_LI64(_R12, func);
+			EMIT(PPC_RAW_MTCTR(_R12));
+		}
+		EMIT(PPC_RAW_BCTRL());
+		/*
+		 * Load r2 with kernel TOC as kernel TOC is used if function address falls
+		 * within core kernel text.
+		 */
+		EMIT(PPC_RAW_LD(_R2, _R13, offsetof(struct paca_struct, kernel_toc)));
 	}
+#endif
 
 	return 0;
 }
···
 	int b2p_index = bpf_to_ppc(BPF_REG_3);
 	int bpf_tailcall_prologue_size = 8;
 
-	if (IS_ENABLED(CONFIG_PPC64_ELF_ABI_V2))
+	if (!IS_ENABLED(CONFIG_PPC_KERNEL_PCREL) && IS_ENABLED(CONFIG_PPC64_ELF_ABI_V2))
 		bpf_tailcall_prologue_size += 4; /* skip past the toc load */
 
 	/*
···
 				return ret;
 
 			if (func_addr_fixed)
-				ret = bpf_jit_emit_func_call_hlp(image, ctx, func_addr);
+				ret = bpf_jit_emit_func_call_hlp(image, fimage, ctx, func_addr);
 			else
 				ret = bpf_jit_emit_func_call_rel(image, fimage, ctx, func_addr);
 

arch/powerpc/platforms/512x/mpc512x_shared.c

···
 	 * and so negatively affect boot time. Instead we reserve the
 	 * already configured frame buffer area so that it won't be
 	 * destroyed. The starting address of the area to reserve and
-	 * also it's length is passed to memblock_reserve(). It will be
+	 * also its length is passed to memblock_reserve(). It will be
 	 * freed later on first open of fbdev, when splash image is not
 	 * needed any more.
 	 */

arch/powerpc/platforms/52xx/lite5200_sleep.S

···
 
 	/* HIDs, MSR */
 	LOAD_SPRN(HID1, 0x19)
-	LOAD_SPRN(HID2, 0x1a)
+	/* FIXME: Should this use HID2_G2_LE? */
+	LOAD_SPRN(HID2_750FX, 0x1a)
 
 
 	/* address translation is tricky (see turn_on_mmu) */
···
 
 	SAVE_SPRN(HID0, 0x18)
 	SAVE_SPRN(HID1, 0x19)
-	SAVE_SPRN(HID2, 0x1a)
+	/* FIXME: Should this use HID2_G2_LE? */
+	SAVE_SPRN(HID2_750FX, 0x1a)
 	mfmsr	r10
 	stw	r10, (4*0x1b)(r4)
 	/*SAVE_SPRN(LR, 0x1c) have to save it before the call */

arch/powerpc/platforms/52xx/mpc52xx_common.c

···
 
 #undef DEBUG
 
-#include <linux/gpio.h>
 #include <linux/kernel.h>
 #include <linux/spinlock.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
-#include <linux/of_gpio.h>
 #include <linux/export.h>
 #include <asm/io.h>
 #include <asm/mpc52xx.h>

arch/powerpc/platforms/52xx/mpc52xx_gpt.c

···
  * the output mode.  This driver does not change the output mode setting.
  */
 
+#include <linux/gpio/driver.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
···
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
-#include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/kernel.h>
 #include <linux/property.h>

arch/powerpc/platforms/83xx/suspend-asm.S

···
 
 	mfspr	r5, SPRN_HID0
 	mfspr	r6, SPRN_HID1
-	mfspr	r7, SPRN_HID2
+	/* FIXME: Should this use SPRN_HID2_G2_LE? */
+	mfspr	r7, SPRN_HID2_750FX
 
 	stw	r5, SS_HID+0(r3)
 	stw	r6, SS_HID+4(r3)
···
 
 	mtspr	SPRN_HID0, r5
 	mtspr	SPRN_HID1, r6
-	mtspr	SPRN_HID2, r7
+	/* FIXME: Should this use SPRN_HID2_G2_LE? */
+	mtspr	SPRN_HID2_750FX, r7
 
 	lwz	r4, SS_IABR+0(r3)
 	lwz	r5, SS_IABR+4(r3)

arch/powerpc/platforms/85xx/smp.c

···
 	hard_irq_disable();
 	mpic_teardown_this_cpu(secondary);
 
+#ifdef CONFIG_CRASH_DUMP
 	if (cpu == crashing_cpu && cpu_thread_in_core(cpu) != 0) {
 		/*
 		 * We enter the crash kernel on whatever cpu crashed,
···
 		 */
 		disable_threadbit = 1;
 		disable_cpu = cpu_first_thread_sibling(cpu);
-	} else if (sibling != crashing_cpu &&
-		   cpu_thread_in_core(cpu) == 0 &&
-		   cpu_thread_in_core(sibling) != 0) {
+	} else if (sibling == crashing_cpu) {
+		return;
+	}
+#endif
+	if (cpu_thread_in_core(cpu) == 0 && cpu_thread_in_core(sibling) != 0) {
 		disable_threadbit = 2;
 		disable_cpu = sibling;
 	}

arch/powerpc/platforms/cell/iommu.c

···
 	cell_iommu_enable_hardware(iommu);
 }
 
-#if 0/* Unused for now */
-static struct iommu_window *find_window(struct cbe_iommu *iommu,
-		unsigned long offset, unsigned long size)
-{
-	struct iommu_window *window;
-
-	/* todo: check for overlapping (but not equal) windows) */
-
-	list_for_each_entry(window, &(iommu->windows), list) {
-		if (window->offset == offset && window->size == size)
-			return window;
-	}
-
-	return NULL;
-}
-#endif
-
 static inline u32 cell_iommu_get_ioid(struct device_node *np)
 {
 	const u32 *ioid;

arch/powerpc/platforms/cell/smp.c

···
 
 /**
  * smp_startup_cpu() - start the given cpu
+ * @lcpu: Logical CPU ID of the CPU to be started.
  *
  * At boot time, there is nothing to do for primary threads which were
  * started from Open Firmware.  For anything else, call RTAS with the

arch/powerpc/platforms/cell/spufs/file.c

···
 
 	ret = spu_acquire(ctx);
 	if (ret)
-		goto out;
-#if 0
-/* this currently hangs */
-	ret = spufs_wait(ctx->mfc_wq,
-			 ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2));
-	if (ret)
-		goto out;
-	ret = spufs_wait(ctx->mfc_wq,
-			 ctx->ops->read_mfc_tagstatus(ctx) == ctx->tagwait);
-	if (ret)
-		goto out;
-#else
-	ret = 0;
-#endif
+		return ret;
+
 	spu_release(ctx);
-out:
-	return ret;
+
+	return 0;
 }
 
 static int spufs_mfc_fsync(struct file *file, loff_t start, loff_t end, int datasync)

arch/powerpc/platforms/cell/spufs/sched.c

···
 }
 
 /**
- * spu_deactivate - unbind a context from it's physical spu
+ * spu_deactivate - unbind a context from its physical spu
  * @ctx:	spu context to unbind
  *
  * Unbind @ctx from the physical spu it is running on and schedule

arch/powerpc/platforms/maple/pci.c

···
 
 	/* Probe root PCI hosts, that is on U3 the AGP host and the
 	 * HyperTransport host. That one is actually "kept" around
-	 * and actually added last as it's resource management relies
+	 * and actually added last as its resource management relies
 	 * on the AGP resources to have been setup first
 	 */
 	root = of_find_node_by_path("/");

arch/powerpc/platforms/powermac/pic.c

···
 /*
  *  Support for the interrupt controllers found on Power Macintosh,
  *  currently Apple's "Grand Central" interrupt controller in all
- *  it's incarnations. OpenPIC support used on newer machines is
+ *  its incarnations. OpenPIC support used on newer machines is
  *  in a separate file
  *
  *  Copyright (C) 1997 Paul Mackerras ([e-mail])

arch/powerpc/platforms/powermac/sleep.S

···
 	 *    memory location containing the PC to resume from
 	 *    at address 0.
 	 *  - On Core99, we must store the wakeup vector at
-	 *    address 0x80 and eventually it's parameters
+	 *    address 0x80 and eventually its parameters
 	 *    at address 0x84. I've have some trouble with those
 	 *    parameters however and I no longer use them.
 	 */

arch/powerpc/platforms/powernv/opal-fadump.c

···
 	final_note(note_buf);
 
 	pr_debug("Updating elfcore header (%llx) with cpu notes\n",
-		 fdh->elfcorehdr_addr);
-	fadump_update_elfcore_header(__va(fdh->elfcorehdr_addr));
+		 fadump_conf->elfcorehdr_addr);
+	fadump_update_elfcore_header((char *)fadump_conf->elfcorehdr_addr);
 	return 0;
 }
 
···
 	if (!opal_fdm_active || !fadump_conf->fadumphdr_addr)
 		return rc;
 
-	/* Validate the fadump crash info header */
 	fdh = __va(fadump_conf->fadumphdr_addr);
-	if (fdh->magic_number != FADUMP_CRASH_INFO_MAGIC) {
-		pr_err("Crash info header is not valid.\n");
-		return rc;
-	}
 
 #ifdef CONFIG_OPAL_CORE
 	/*
···
 		kernel_initiated = true;
 #endif
 
-	rc = opal_fadump_build_cpu_notes(fadump_conf, fdh);
-	if (rc)
-		return rc;
-
-	/*
-	 * We are done validating dump info and elfcore header is now ready
-	 * to be exported. set elfcorehdr_addr so that vmcore module will
-	 * export the elfcore header through '/proc/vmcore'.
-	 */
-	elfcorehdr_addr = fdh->elfcorehdr_addr;
-
-	return rc;
+	return opal_fadump_build_cpu_notes(fadump_conf, fdh);
 }
 
 static void opal_fadump_region_show(struct fw_dump *fadump_conf,
···
 		pr_emerg("No backend support for MPIPL!\n");
 }
 
+/* FADUMP_MAX_MEM_REGS or lower */
+static int opal_fadump_max_boot_mem_rgns(void)
+{
+	return FADUMP_MAX_MEM_REGS;
+}
+
 static struct fadump_ops opal_fadump_ops = {
 	.fadump_init_mem_struct		= opal_fadump_init_mem_struct,
 	.fadump_get_metadata_size	= opal_fadump_get_metadata_size,
···
 	.fadump_process			= opal_fadump_process,
 	.fadump_region_show		= opal_fadump_region_show,
 	.fadump_trigger			= opal_fadump_trigger,
+	.fadump_max_boot_mem_rgns	= opal_fadump_max_boot_mem_rgns,
 };
 
 void __init opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node)
···
 		}
 	}
 
-	fadump_conf->ops		= &opal_fadump_ops;
-	fadump_conf->fadump_supported	= 1;
+	fadump_conf->ops			= &opal_fadump_ops;
+	fadump_conf->fadump_supported		= 1;
+	/* TODO: Add support to pass additional parameters */
+	fadump_conf->param_area_supported	= 0;
 
 	/*
 	 * Firmware supports 32-bit field for size. Align it to PAGE_SIZE

arch/powerpc/platforms/powernv/pci-sriov.c

···
 	} else if (pdev->is_physfn) {
 		/*
 		 * For PFs adjust their allocated IOV resources to match what
-		 * the PHB can support using it's M64 BAR table.
+		 * the PHB can support using its M64 BAR table.
 		 */
 		pnv_pci_ioda_fixup_iov_resources(pdev);
 	}
···
 		list_add_tail(&pe->list, &phb->ioda.pe_list);
 		mutex_unlock(&phb->ioda.pe_list_mutex);
 
-		/* associate this pe to it's pdn */
+		/* associate this pe to its pdn */
 		list_for_each_entry(vf_pdn, &pdn->parent->child_list, list) {
 			if (vf_pdn->busno == vf_bus &&
 			    vf_pdn->devfn == vf_devfn) {

arch/powerpc/platforms/powernv/vas-window.c

···
 		}
 	} else {
 		/*
-		 * Interrupt hanlder or fault window setup failed. Means
+		 * Interrupt handler or fault window setup failed. Means
 		 * NX can not generate fault for page fault. So not
 		 * opening for user space tx window.
 		 */

arch/powerpc/platforms/ps3/device-init.c

···
 
 static int ps3_probe_thread(void *data)
 {
-	struct ps3_notification_device dev;
+	struct {
+		struct ps3_notification_device dev;
+		u8 buf[512];
+	} *local;
+	struct ps3_notify_cmd *notify_cmd;
+	struct ps3_notify_event *notify_event;
 	int res;
 	unsigned int irq;
 	u64 lpar;
-	void *buf;
-	struct ps3_notify_cmd *notify_cmd;
-	struct ps3_notify_event *notify_event;
 
 	pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);
 
-	buf = kzalloc(512, GFP_KERNEL);
-	if (!buf)
+	local = kzalloc(sizeof(*local), GFP_KERNEL);
+	if (!local)
 		return -ENOMEM;
 
-	lpar = ps3_mm_phys_to_lpar(__pa(buf));
-	notify_cmd = buf;
-	notify_event = buf;
+	lpar = ps3_mm_phys_to_lpar(__pa(&local->buf));
+	notify_cmd = (struct ps3_notify_cmd *)&local->buf;
+	notify_event = (struct ps3_notify_event *)&local->buf;
 
 	/* dummy system bus device */
-	dev.sbd.bus_id = (u64)data;
-	dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
-	dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
+	local->dev.sbd.bus_id = (u64)data;
+	local->dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID;
+	local->dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID;
 
-	res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0);
+	res = lv1_open_device(local->dev.sbd.bus_id, local->dev.sbd.dev_id, 0);
 	if (res) {
 		pr_err("%s:%u: lv1_open_device failed %s\n", __func__,
 		       __LINE__, ps3_result(res));
 		goto fail_free;
 	}
 
-	res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY,
-					      &irq);
+	res = ps3_sb_event_receive_port_setup(&local->dev.sbd,
+		PS3_BINDING_CPU_ANY, &irq);
 	if (res) {
 		pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n",
 		       __func__, __LINE__, res);
 	       goto fail_close_device;
 	}
 
-	spin_lock_init(&dev.lock);
-	rcuwait_init(&dev.wait);
+	spin_lock_init(&local->dev.lock);
+	rcuwait_init(&local->dev.wait);
 
 	res = request_irq(irq, ps3_notification_interrupt, 0,
-			  "ps3_notification", &dev);
+			  "ps3_notification", &local->dev);
 	if (res) {
 		pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__,
 		       res);
···
 	notify_cmd->operation_code = 0; /* must be zero */
 	notify_cmd->event_mask = 1UL << notify_region_probe;
 
-	res = ps3_notification_read_write(&dev, lpar, 1);
+	res = ps3_notification_read_write(&local->dev, lpar, 1);
 	if (res)
 		goto fail_free_irq;
 
···
 
 		memset(notify_event, 0, sizeof(*notify_event));
 
-		res = ps3_notification_read_write(&dev, lpar, 0);
+		res = ps3_notification_read_write(&local->dev, lpar, 0);
 		if (res)
 			break;
 
 		pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu"
 			 " type %llu port %llu\n", __func__, __LINE__,
-			 notify_event->event_type, notify_event->bus_id,
-			 notify_event->dev_id, notify_event->dev_type,
-			 notify_event->dev_port);
+			notify_event->event_type, notify_event->bus_id,
+			notify_event->dev_id, notify_event->dev_type,
+			notify_event->dev_port);
 
 		if (notify_event->event_type != notify_region_probe ||
-		    notify_event->bus_id != dev.sbd.bus_id) {
+			notify_event->bus_id != local->dev.sbd.bus_id) {
 			pr_warn("%s:%u: bad notify_event: event %llu, dev_id %llu, dev_type %llu\n",
 				__func__, __LINE__, notify_event->event_type,
 				notify_event->dev_id, notify_event->dev_type);
 			continue;
 		}
 
-		ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id);
+		ps3_find_and_add_device(local->dev.sbd.bus_id,
+			notify_event->dev_id);
 
 	} while (!kthread_should_stop());
 
 fail_free_irq:
-	free_irq(irq, &dev);
+	free_irq(irq, &local->dev);
 fail_sb_event_receive_port_destroy:
-	ps3_sb_event_receive_port_destroy(&dev.sbd, irq);
+	ps3_sb_event_receive_port_destroy(&local->dev.sbd, irq);
 fail_close_device:
-	lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id);
+	lv1_close_device(local->dev.sbd.bus_id, local->dev.sbd.dev_id);
 fail_free:
-	kfree(buf);
+	kfree(local);
 
 	probe_task = NULL;
 

arch/powerpc/platforms/pseries/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
-ccflags-$(CONFIG_PPC64)			:= $(NO_MINIMAL_TOC)
 ccflags-$(CONFIG_PPC_PSERIES_DEBUG)	+= -DDEBUG
 
 obj-y			:= lpar.o hvCall.o nvram.o reconfig.o \

arch/powerpc/platforms/pseries/lpar.c

···
  * h_get_mpp
  * H_GET_MPP hcall returns info in 7 parms
  */
-int h_get_mpp(struct hvcall_mpp_data *mpp_data)
+long h_get_mpp(struct hvcall_mpp_data *mpp_data)
 {
-	int rc;
-	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
+	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0};
+	long rc;
 
 	rc = plpar_hcall9(H_GET_MPP, retbuf);
 

arch/powerpc/platforms/pseries/lparcfg.c

···
  */
 static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
 {
-	unsigned long rc;
-	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
+	unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = {0};
+	long rc;
 
 	rc = plpar_hcall9(H_GET_PPP, retbuf);
 
···
 	kfree(buf);
 }
 
-static unsigned h_pic(unsigned long *pool_idle_time,
-		      unsigned long *num_procs)
+static long h_pic(unsigned long *pool_idle_time,
+		  unsigned long *num_procs)
 {
-	unsigned long rc;
-	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+	long rc;
+	unsigned long retbuf[PLPAR_HCALL_BUFSIZE] = {0};
 
 	rc = plpar_hcall(H_PIC, retbuf);
 
-	*pool_idle_time = retbuf[0];
-	*num_procs = retbuf[1];
+	if (pool_idle_time)
+		*pool_idle_time = retbuf[0];
+	if (num_procs)
+		*num_procs = retbuf[1];
 
 	return rc;
 }
+
+unsigned long boot_pool_idle_time;
 
 /*
  * parse_ppp_data
···
 	struct hvcall_ppp_data ppp_data;
 	struct device_node *root;
 	const __be32 *perf_level;
-	int rc;
+	long rc;
 
 	rc = h_get_ppp(&ppp_data);
 	if (rc)
···
 		seq_printf(m, "pool_capacity=%d\n",
 			   ppp_data.active_procs_in_pool * 100);
 
-		h_pic(&pool_idle_time, &pool_procs);
-		seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
-		seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
+		/* In case h_pic call is not successful, this would result in
+		 * APP values being wrong in tools like lparstat.
+		 */
+
+		if (h_pic(&pool_idle_time, &pool_procs) == H_SUCCESS) {
+			seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
+			seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
+			seq_printf(m, "boot_pool_idle_time=%ld\n", boot_pool_idle_time);
+		}
 	}
 
 	seq_printf(m, "unallocated_capacity_weight=%d\n",
···
 static int __init lparcfg_init(void)
 {
 	umode_t mode = 0444;
+	long retval;
 
 	/* Allow writing if we have FW_FEATURE_SPLPAR */
 	if (firmware_has_feature(FW_FEATURE_SPLPAR))
···
 		printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
 		return -EIO;
 	}
+
+	/* If this call fails, it would result in APP values
+	 * being wrong for since boot reports of lparstat
+	 */
+	retval = h_pic(&boot_pool_idle_time, NULL);
+
+	if (retval != H_SUCCESS)
+		pr_debug("H_PIC failed during lparcfg init retval: %ld\n",
+			 retval);
+
 	return 0;
 }
 machine_device_initcall(pseries, lparcfg_init);

arch/powerpc/platforms/pseries/pci.c

···
 #include <asm/pci.h>
 #include "pseries.h"
 
-#if 0
-void pcibios_name_device(struct pci_dev *dev)
-{
-	struct device_node *dn;
-
-	/*
-	 * Add IBM loc code (slot) as a prefix to the device names for service
-	 */
-	dn = pci_device_to_OF_node(dev);
-	if (dn) {
-		const char *loc_code = of_get_property(dn, "ibm,loc-code",
-				NULL);
-		if (loc_code) {
-			int loc_len = strlen(loc_code);
-			if (loc_len < sizeof(dev->dev.name)) {
-				memmove(dev->dev.name+loc_len+1, dev->dev.name,
-					sizeof(dev->dev.name)-loc_len-1);
-				memcpy(dev->dev.name, loc_code, loc_len);
-				dev->dev.name[loc_len] = ' ';
-				dev->dev.name[sizeof(dev->dev.name)-1] = '\0';
-			}
-		}
-	}
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
-#endif
-
 #ifdef CONFIG_PCI_IOV
 #define MAX_VFS_FOR_MAP_PE 256
 struct pe_map_bar_entry {

arch/powerpc/platforms/pseries/rtas-fadump.c

···
 
 #include <asm/page.h>
 #include <asm/rtas.h>
+#include <asm/setup.h>
 #include <asm/fadump.h>
 #include <asm/fadump-internal.h>
 
···
 static void rtas_fadump_update_config(struct fw_dump *fadump_conf,
 				      const struct rtas_fadump_mem_struct *fdm)
 {
-	fadump_conf->boot_mem_dest_addr =
-		be64_to_cpu(fdm->rmr_region.destination_address);
-
 	fadump_conf->fadumphdr_addr = (fadump_conf->boot_mem_dest_addr +
 				       fadump_conf->boot_memory_size);
 }
···
 static void __init rtas_fadump_get_config(struct fw_dump *fadump_conf,
 				   const struct rtas_fadump_mem_struct *fdm)
 {
-	fadump_conf->boot_mem_addr[0] =
-		be64_to_cpu(fdm->rmr_region.source_address);
-	fadump_conf->boot_mem_sz[0] = be64_to_cpu(fdm->rmr_region.source_len);
-	fadump_conf->boot_memory_size = fadump_conf->boot_mem_sz[0];
+	unsigned long base, size, last_end, hole_size;
 
-	fadump_conf->boot_mem_top = fadump_conf->boot_memory_size;
-	fadump_conf->boot_mem_regs_cnt = 1;
+	last_end = 0;
+	hole_size = 0;
+	fadump_conf->boot_memory_size = 0;
+	fadump_conf->boot_mem_regs_cnt = 0;
+	pr_debug("Boot memory regions:\n");
+	for (int i = 0; i < be16_to_cpu(fdm->header.dump_num_sections); i++) {
+		int type = be16_to_cpu(fdm->rgn[i].source_data_type);
+		u64 addr;
 
-	/*
-	 * Start address of reserve dump area (permanent reservation) for
-	 * re-registering FADump after dump capture.
-	 */
-	fadump_conf->reserve_dump_area_start =
-		be64_to_cpu(fdm->cpu_state_data.destination_address);
+		switch (type) {
+		case RTAS_FADUMP_CPU_STATE_DATA:
+			addr = be64_to_cpu(fdm->rgn[i].destination_address);
+
+			fadump_conf->cpu_state_dest_vaddr = (u64)__va(addr);
+			/*
+			 * Start address of reserve dump area (permanent reservation) for
+			 * re-registering FADump after dump capture.
+			 */
+			fadump_conf->reserve_dump_area_start = addr;
+			break;
+		case RTAS_FADUMP_HPTE_REGION:
+			/* Not processed currently. */
+			break;
+		case RTAS_FADUMP_REAL_MODE_REGION:
+			base = be64_to_cpu(fdm->rgn[i].source_address);
+			size = be64_to_cpu(fdm->rgn[i].source_len);
+			pr_debug("\t[%03d] base: 0x%lx, size: 0x%lx\n", i, base, size);
+			if (!base) {
+				fadump_conf->boot_mem_dest_addr =
+					be64_to_cpu(fdm->rgn[i].destination_address);
+			}
+
+			fadump_conf->boot_mem_addr[fadump_conf->boot_mem_regs_cnt] = base;
+			fadump_conf->boot_mem_sz[fadump_conf->boot_mem_regs_cnt] = size;
+			fadump_conf->boot_memory_size += size;
+			hole_size += (base - last_end);
+			last_end = base + size;
+			fadump_conf->boot_mem_regs_cnt++;
+			break;
+		case RTAS_FADUMP_PARAM_AREA:
+			fadump_conf->param_area = be64_to_cpu(fdm->rgn[i].destination_address);
+			break;
+		default:
+			pr_warn("Section type %d unsupported on this kernel. Ignoring!\n", type);
+			break;
+		}
+	}
+	fadump_conf->boot_mem_top = fadump_conf->boot_memory_size + hole_size;
 
 	rtas_fadump_update_config(fadump_conf, fdm);
 }
···
 static u64 rtas_fadump_init_mem_struct(struct fw_dump *fadump_conf)
 {
 	u64 addr = fadump_conf->reserve_dump_area_start;
+	u16 sec_cnt = 0;
 
 	memset(&fdm, 0, sizeof(struct rtas_fadump_mem_struct));
 	addr = addr & PAGE_MASK;
 
 	fdm.header.dump_format_version = cpu_to_be32(0x00000001);
-	fdm.header.dump_num_sections = cpu_to_be16(3);
 	fdm.header.dump_status_flag = 0;
 	fdm.header.offset_first_dump_section =
-		cpu_to_be32((u32)offsetof(struct rtas_fadump_mem_struct,
-					  cpu_state_data));
+		cpu_to_be32((u32)offsetof(struct rtas_fadump_mem_struct, rgn));
 
 	/*
 	 * Fields for disk dump option.
···
 
 	/* Kernel dump sections */
 	/* cpu state data section. */
-	fdm.cpu_state_data.request_flag =
-		cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
-	fdm.cpu_state_data.source_data_type =
-		cpu_to_be16(RTAS_FADUMP_CPU_STATE_DATA);
-	fdm.cpu_state_data.source_address = 0;
-	fdm.cpu_state_data.source_len =
-		cpu_to_be64(fadump_conf->cpu_state_data_size);
-	fdm.cpu_state_data.destination_address = cpu_to_be64(addr);
+	fdm.rgn[sec_cnt].request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
+	fdm.rgn[sec_cnt].source_data_type = cpu_to_be16(RTAS_FADUMP_CPU_STATE_DATA);
+	fdm.rgn[sec_cnt].source_address = 0;
+	fdm.rgn[sec_cnt].source_len = cpu_to_be64(fadump_conf->cpu_state_data_size);
+	fdm.rgn[sec_cnt].destination_address = cpu_to_be64(addr);
 	addr += fadump_conf->cpu_state_data_size;
+	sec_cnt++;
 
 	/* hpte region section */
-	fdm.hpte_region.request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
-	fdm.hpte_region.source_data_type =
-		cpu_to_be16(RTAS_FADUMP_HPTE_REGION);
-	fdm.hpte_region.source_address = 0;
-	fdm.hpte_region.source_len =
-		cpu_to_be64(fadump_conf->hpte_region_size);
-	fdm.hpte_region.destination_address = cpu_to_be64(addr);
+	fdm.rgn[sec_cnt].request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
+	fdm.rgn[sec_cnt].source_data_type = cpu_to_be16(RTAS_FADUMP_HPTE_REGION);
+	fdm.rgn[sec_cnt].source_address = 0;
+	fdm.rgn[sec_cnt].source_len = cpu_to_be64(fadump_conf->hpte_region_size);
+	fdm.rgn[sec_cnt].destination_address = cpu_to_be64(addr);
 	addr += fadump_conf->hpte_region_size;
+	sec_cnt++;
 
 	/*
 	 * Align boot memory area destination address to page boundary to
···
 	 */
 	addr = PAGE_ALIGN(addr);
 
-	/* RMA region section */
-	fdm.rmr_region.request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
-	fdm.rmr_region.source_data_type =
-		cpu_to_be16(RTAS_FADUMP_REAL_MODE_REGION);
-	fdm.rmr_region.source_address = cpu_to_be64(0);
-	fdm.rmr_region.source_len = cpu_to_be64(fadump_conf->boot_memory_size);
-	fdm.rmr_region.destination_address = cpu_to_be64(addr);
-	addr += fadump_conf->boot_memory_size;
+	/* First boot memory region destination address */
+	fadump_conf->boot_mem_dest_addr = addr;
+	for (int i = 0; i < fadump_conf->boot_mem_regs_cnt; i++) {
+		/* Boot memory regions */
+		fdm.rgn[sec_cnt].request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
+		fdm.rgn[sec_cnt].source_data_type = cpu_to_be16(RTAS_FADUMP_REAL_MODE_REGION);
+		fdm.rgn[sec_cnt].source_address = cpu_to_be64(fadump_conf->boot_mem_addr[i]);
+		fdm.rgn[sec_cnt].source_len = cpu_to_be64(fadump_conf->boot_mem_sz[i]);
+		fdm.rgn[sec_cnt].destination_address = cpu_to_be64(addr);
+		addr += fadump_conf->boot_mem_sz[i];
+		sec_cnt++;
+	}
+
+	/* Parameters area */
+	if (fadump_conf->param_area) {
+		fdm.rgn[sec_cnt].request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG);
+		fdm.rgn[sec_cnt].source_data_type = cpu_to_be16(RTAS_FADUMP_PARAM_AREA);
+		fdm.rgn[sec_cnt].source_address = cpu_to_be64(fadump_conf->param_area);
+		fdm.rgn[sec_cnt].source_len = cpu_to_be64(COMMAND_LINE_SIZE);
+		fdm.rgn[sec_cnt].destination_address = cpu_to_be64(fadump_conf->param_area);
+		sec_cnt++;
+	}
+	fdm.header.dump_num_sections = cpu_to_be16(sec_cnt);
 
 	rtas_fadump_update_config(fadump_conf, &fdm);
 
···
 
 static int rtas_fadump_register(struct fw_dump *fadump_conf)
 {
-	unsigned int wait_time;
+	unsigned int wait_time, fdm_size;
 	int rc, err = -EIO;
+
+	/*
+	 * Platform requires the exact size of the Dump Memory Structure.
+	 * Avoid including any unused rgns in the calculation, as this
+	 * could result in a parameter error (-3) from the platform.
+	 */
+	fdm_size = sizeof(struct rtas_fadump_section_header);
+	fdm_size += be16_to_cpu(fdm.header.dump_num_sections) * sizeof(struct rtas_fadump_section);
 
 	/* TODO: Add upper time limit for the delay */
 	do {
 		rc =  rtas_call(fadump_conf->ibm_configure_kernel_dump, 3, 1,
-				NULL, FADUMP_REGISTER, &fdm,
-				sizeof(struct rtas_fadump_mem_struct));
+				NULL, FADUMP_REGISTER, &fdm, fdm_size);
 
 		wait_time = rtas_busy_delay_time(rc);
 		if (wait_time)
···
 		pr_err("Failed to register. Hardware Error(%d).\n", rc);
 		break;
 	case -3:
-		if (!is_fadump_boot_mem_contiguous())
-			pr_err("Can't have holes in boot memory area.\n");
-		else if (!is_fadump_reserved_mem_contiguous())
+		if (!is_fadump_reserved_mem_contiguous())
 			pr_err("Can't have holes in reserved memory area.\n");
 
 		pr_err("Failed to register. Parameter Error(%d).\n", rc);
···
 	u32 num_cpus, *note_buf;
 	int i, rc = 0, cpu = 0;
 	struct pt_regs regs;
-	unsigned long addr;
 	void *vaddr;
 
-	addr = be64_to_cpu(fdm_active->cpu_state_data.destination_address);
-	vaddr = __va(addr);
+	vaddr = (void *)fadump_conf->cpu_state_dest_vaddr;
 
 	reg_header = vaddr;
 	if (be64_to_cpu(reg_header->magic_number) !=
···
 	}
 	final_note(note_buf);
 
-	if (fdh) {
-		pr_debug("Updating elfcore header (%llx) with cpu notes\n",
-			 fdh->elfcorehdr_addr);
-		fadump_update_elfcore_header(__va(fdh->elfcorehdr_addr));
-	}
+	pr_debug("Updating elfcore header (%llx) with cpu notes\n", fadump_conf->elfcorehdr_addr);
+	fadump_update_elfcore_header((char *)fadump_conf->elfcorehdr_addr);
 	return 0;
 
 error_out:
···
 }
 
 /*
- * Validate and process the dump data stored by firmware before exporting
- * it through '/proc/vmcore'.
+ * Validate and process the dump data stored by the firmware, and update
+ * the CPU notes of elfcorehdr.
  */
 static int __init rtas_fadump_process(struct fw_dump *fadump_conf)
 {
-	struct fadump_crash_info_header *fdh;
-	int rc = 0;
-
 	if (!fdm_active || !fadump_conf->fadumphdr_addr)
 		return -EINVAL;
 
 	/* Check if the dump data is valid. */
-	if ((be16_to_cpu(fdm_active->header.dump_status_flag) ==
-			RTAS_FADUMP_ERROR_FLAG) ||
-			(fdm_active->cpu_state_data.error_flags != 0) ||
-			(fdm_active->rmr_region.error_flags != 0)) {
-		pr_err("Dump taken by platform is not valid\n");
-		return -EINVAL;
+	for (int i = 0; i < be16_to_cpu(fdm_active->header.dump_num_sections); i++) {
+		int type = be16_to_cpu(fdm_active->rgn[i].source_data_type);
+		int rc = 0;
+
+		switch (type) {
+		case RTAS_FADUMP_CPU_STATE_DATA:
+		case RTAS_FADUMP_HPTE_REGION:
+		case RTAS_FADUMP_REAL_MODE_REGION:
+			if (fdm_active->rgn[i].error_flags != 0) {
+				pr_err("Dump taken by platform is not valid (%d)\n", i);
+				rc = -EINVAL;
+			}
+			if (fdm_active->rgn[i].bytes_dumped != fdm_active->rgn[i].source_len) {
+				pr_err("Dump taken by platform is incomplete (%d)\n", i);
+				rc = -EINVAL;
+			}
+			if (rc) {
+				pr_warn("Region type: %u src addr: 0x%llx dest addr: 0x%llx\n",
+					be16_to_cpu(fdm_active->rgn[i].source_data_type),
+					be64_to_cpu(fdm_active->rgn[i].source_address),
+					be64_to_cpu(fdm_active->rgn[i].destination_address));
+				return rc;
+			}
+			break;
+		case RTAS_FADUMP_PARAM_AREA:
+			if (fdm_active->rgn[i].bytes_dumped != fdm_active->rgn[i].source_len ||
+			    fdm_active->rgn[i].error_flags != 0) {
+				pr_warn("Failed to process additional parameters! Proceeding anyway..\n");
+				fadump_conf->param_area = 0;
+			}
+			break;
+		default:
+			/*
+			 * If the first/crashed kernel added a new region type that the
+			 * second/fadump kernel doesn't recognize, skip it and process
+			 * assuming backward compatibility.
+			 */
+			pr_warn("Unknown region found: type: %u src addr: 0x%llx dest addr: 0x%llx\n",
+				be16_to_cpu(fdm_active->rgn[i].source_data_type),
+				be64_to_cpu(fdm_active->rgn[i].source_address),
+				be64_to_cpu(fdm_active->rgn[i].destination_address));
+			break;
+		}
 	}
-	if ((fdm_active->rmr_region.bytes_dumped !=
-			fdm_active->rmr_region.source_len) ||
-			!fdm_active->cpu_state_data.bytes_dumped) {
-		pr_err("Dump taken by platform is incomplete\n");
-		return -EINVAL;
-	}
 
-	/* Validate the fadump crash info header */
-	fdh = __va(fadump_conf->fadumphdr_addr);
-	if (fdh->magic_number != FADUMP_CRASH_INFO_MAGIC) {
-		pr_err("Crash info header is not valid.\n");
-		return -EINVAL;
-	}
-
-	rc = rtas_fadump_build_cpu_notes(fadump_conf);
-	if (rc)
-		return rc;
-
-	/*
-	 * We are done validating dump info and elfcore header is now ready
-	 * to be exported. set elfcorehdr_addr so that vmcore module will
-	 * export the elfcore header through '/proc/vmcore'.
-	 */
-	elfcorehdr_addr = fdh->elfcorehdr_addr;
-
-	return 0;
+	return rtas_fadump_build_cpu_notes(fadump_conf);
 }
 
 static void rtas_fadump_region_show(struct fw_dump *fadump_conf,
 				    struct seq_file *m)
 {
-	const struct rtas_fadump_section *cpu_data_section;
 	const struct rtas_fadump_mem_struct *fdm_ptr;
 
 	if (fdm_active)
···
 	else
 		fdm_ptr = &fdm;
 
-	cpu_data_section = &(fdm_ptr->cpu_state_data);
-	seq_printf(m, "CPU :[%#016llx-%#016llx] %#llx bytes, Dumped: %#llx\n",
-		   be64_to_cpu(cpu_data_section->destination_address),
-		   be64_to_cpu(cpu_data_section->destination_address) +
-		   be64_to_cpu(cpu_data_section->source_len) - 1,
-		   be64_to_cpu(cpu_data_section->source_len),
-		   be64_to_cpu(cpu_data_section->bytes_dumped));
 
-	seq_printf(m, "HPTE:[%#016llx-%#016llx] %#llx bytes, Dumped: %#llx\n",
-		   be64_to_cpu(fdm_ptr->hpte_region.destination_address),
-		   be64_to_cpu(fdm_ptr->hpte_region.destination_address) +
-		   be64_to_cpu(fdm_ptr->hpte_region.source_len) - 1,
-		   be64_to_cpu(fdm_ptr->hpte_region.source_len),
-		   be64_to_cpu(fdm_ptr->hpte_region.bytes_dumped));
+	for (int i = 0; i < be16_to_cpu(fdm_ptr->header.dump_num_sections); i++) {
+		int type = be16_to_cpu(fdm_ptr->rgn[i].source_data_type);
 
-	seq_printf(m, "DUMP: Src: %#016llx, Dest: %#016llx, ",
-		   be64_to_cpu(fdm_ptr->rmr_region.source_address),
-		   be64_to_cpu(fdm_ptr->rmr_region.destination_address));
-	seq_printf(m, "Size: %#llx, Dumped: %#llx bytes\n",
-		   be64_to_cpu(fdm_ptr->rmr_region.source_len),
-		   be64_to_cpu(fdm_ptr->rmr_region.bytes_dumped));
+		switch (type) {
+		case RTAS_FADUMP_CPU_STATE_DATA:
+			seq_printf(m, "CPU :[%#016llx-%#016llx] %#llx bytes, Dumped: %#llx\n",
+				   be64_to_cpu(fdm_ptr->rgn[i].destination_address),
+				   be64_to_cpu(fdm_ptr->rgn[i].destination_address) +
+				   be64_to_cpu(fdm_ptr->rgn[i].source_len) - 1,
+				   be64_to_cpu(fdm_ptr->rgn[i].source_len),
+				   be64_to_cpu(fdm_ptr->rgn[i].bytes_dumped));
+			break;
+		case RTAS_FADUMP_HPTE_REGION:
+			seq_printf(m, "HPTE:[%#016llx-%#016llx] %#llx bytes, Dumped: %#llx\n",
+				   be64_to_cpu(fdm_ptr->rgn[i].destination_address),
+				   be64_to_cpu(fdm_ptr->rgn[i].destination_address) +
+				   be64_to_cpu(fdm_ptr->rgn[i].source_len) - 1,
+				   be64_to_cpu(fdm_ptr->rgn[i].source_len),
+				   be64_to_cpu(fdm_ptr->rgn[i].bytes_dumped));
+			break;
+		case RTAS_FADUMP_REAL_MODE_REGION:
+			seq_printf(m, "DUMP: Src: %#016llx, Dest: %#016llx, ",
+				   be64_to_cpu(fdm_ptr->rgn[i].source_address),
+				   be64_to_cpu(fdm_ptr->rgn[i].destination_address));
+			seq_printf(m, "Size: %#llx, Dumped: %#llx bytes\n",
+				   be64_to_cpu(fdm_ptr->rgn[i].source_len),
+				   be64_to_cpu(fdm_ptr->rgn[i].bytes_dumped));
+			break;
+		case RTAS_FADUMP_PARAM_AREA:
+			seq_printf(m, "\n[%#016llx-%#016llx]: cmdline append: '%s'\n",
+				   be64_to_cpu(fdm_ptr->rgn[i].destination_address),
+				   be64_to_cpu(fdm_ptr->rgn[i].destination_address) +
+				   be64_to_cpu(fdm_ptr->rgn[i].source_len) - 1,
+				   (char *)__va(be64_to_cpu(fdm_ptr->rgn[i].destination_address)));
+			break;
+		default:
+			seq_printf(m, "Unknown region type %d : Src: %#016llx, Dest: %#016llx, ",
+				   type, be64_to_cpu(fdm_ptr->rgn[i].source_address),
+				   be64_to_cpu(fdm_ptr->rgn[i].destination_address));
+			break;
+		}
+	}
 
 	/* Dump is active. Show preserved area start address. */
 	if (fdm_active) {
···
 	rtas_os_term((char *)msg);
 }
 
+/* FADUMP_MAX_MEM_REGS or lower */
+static int rtas_fadump_max_boot_mem_rgns(void)
+{
+	/*
+	 * Version 1 of Kernel Assisted Dump Memory Structure (PAPR) supports 10 sections.
+	 * With one each section taken for CPU state data & HPTE respectively, 8 sections
+	 * can be used for boot memory regions.
+	 *
+	 * If new region(s) is(are) defined, maximum boot memory regions will decrease
+	 * proportionally.
+	 */
+	return RTAS_FADUMP_MAX_BOOT_MEM_REGS;
+}
+
 static struct fadump_ops rtas_fadump_ops = {
 	.fadump_init_mem_struct		= rtas_fadump_init_mem_struct,
 	.fadump_get_bootmem_min		= rtas_fadump_get_bootmem_min,
···
 	.fadump_process			= rtas_fadump_process,
 	.fadump_region_show		= rtas_fadump_region_show,
 	.fadump_trigger			= rtas_fadump_trigger,
+	.fadump_max_boot_mem_rgns	= rtas_fadump_max_boot_mem_rgns,
 };
 
 void __init rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node)
···
 	if (!token)
 		return;
 
-	fadump_conf->ibm_configure_kernel_dump = be32_to_cpu(*token);
-	fadump_conf->ops		= &rtas_fadump_ops;
-	fadump_conf->fadump_supported	= 1;
+	fadump_conf->ibm_configure_kernel_dump	= be32_to_cpu(*token);
+	fadump_conf->ops			= &rtas_fadump_ops;
+	fadump_conf->fadump_supported		= 1;
+	fadump_conf->param_area_supported	= 1;
 
 	/* Firmware supports 64-bit value for size, align it to pagesize. */
 	fadump_conf->max_copy_size = ALIGN_DOWN(U64_MAX, PAGE_SIZE);

arch/powerpc/platforms/pseries/rtas-fadump.h

···
 #define RTAS_FADUMP_HPTE_REGION		0x0002
 #define RTAS_FADUMP_REAL_MODE_REGION	0x0011
 
+/* OS defined sections */
+#define RTAS_FADUMP_PARAM_AREA		0x0100
+
 /* Dump request flag */
 #define RTAS_FADUMP_REQUEST_FLAG	0x00000001
 
 /* Dump status flag */
 #define RTAS_FADUMP_ERROR_FLAG		0x2000
+
+/*
+ * The Firmware Assisted Dump Memory structure supports a maximum of 10 sections
+ * in the dump memory structure. Presently, three sections are used for
+ * CPU state data, HPTE & Parameters area, while the remaining seven sections
+ * can be used for boot memory regions.
+ */
+#define MAX_SECTIONS				10
+#define RTAS_FADUMP_MAX_BOOT_MEM_REGS		7
 
 /* Kernel Dump section info */
 struct rtas_fadump_section {
···
  * Firmware Assisted dump memory structure. This structure is required for
  * registering future kernel dump with power firmware through rtas call.
  *
- * No disk dump option. Hence disk dump path string section is not included.
+ * In version 1, the platform permits one section header, dump-disk path
+ * and ten sections.
+ *
+ * Note: No disk dump option. Hence disk dump path string section is not
+ * included.
  */
 struct rtas_fadump_mem_struct {
 	struct rtas_fadump_section_header	header;
-
-	/* Kernel dump sections */
-	struct rtas_fadump_section		cpu_state_data;
-	struct rtas_fadump_section		hpte_region;
-
-	/*
-	 * TODO: Extend multiple boot memory regions support in the kernel
-	 *       for this platform.
-	 */
-	struct rtas_fadump_section		rmr_region;
+	struct rtas_fadump_section		rgn[MAX_SECTIONS];
 };
 
 /*

arch/powerpc/platforms/pseries/vas.c

···
 	struct pseries_vas_window *txwin = data;
 
 	/*
-	 * The thread hanlder will process this interrupt if it is
+	 * The thread handler will process this interrupt if it is
 	 * already running.
 	 */
 	atomic_inc(&txwin->pending_faults);

arch/powerpc/platforms/pseries/vio.c

···
 	const char *cp;
 
 	dn = dev->of_node;
-	if (!dn)
-		return -ENODEV;
-	cp = of_get_property(dn, "compatible", NULL);
-	if (!cp)
-		return -ENODEV;
+	if (dn && (cp = of_get_property(dn, "compatible", NULL)))
+		add_uevent_var(env, "MODALIAS=vio:T%sS%s", vio_dev->type, cp);
 
-	add_uevent_var(env, "MODALIAS=vio:T%sS%s", vio_dev->type, cp);
 	return 0;
 }
 

arch/powerpc/sysdev/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
 
-ccflags-$(CONFIG_PPC64)		:= $(NO_MINIMAL_TOC)
-
 mpic-msi-obj-$(CONFIG_PCI_MSI)	+= mpic_msi.o mpic_u3msi.o
 obj-$(CONFIG_MPIC)		+= mpic.o $(mpic-msi-obj-y)
 obj-$(CONFIG_MPIC_TIMER)        += mpic_timer.o

arch/powerpc/sysdev/dart_iommu.c

···
 #include <linux/suspend.h>
 #include <linux/memblock.h>
 #include <linux/gfp.h>
-#include <linux/kmemleak.h>
 #include <linux/of_address.h>
 #include <asm/io.h>
 #include <asm/iommu.h>
···
 					NUMA_NO_NODE);
 	if (!dart_tablebase)
 		panic("Failed to allocate 16MB below 2GB for DART table\n");
-
-	/* There is no point scanning the DART space for leaks*/
-	kmemleak_no_scan((void *)dart_tablebase);
 
 	/* Allocate a spare page to map all invalid DART pages. We need to do
 	 * that to work around what looks like a problem with the HT bridge

arch/powerpc/sysdev/fsl_gtm.c

···
 static LIST_HEAD(gtms);
 
 /**
- * gtm_get_timer - request GTM timer to use it with the rest of GTM API
+ * gtm_get_timer16 - request GTM timer to use it with the rest of GTM API
  * Context:	non-IRQ
  *
  * This function reserves GTM timer for later use. It returns gtm_timer
···
 EXPORT_SYMBOL(gtm_get_timer16);
 
 /**
- * gtm_get_specific_timer - request specific GTM timer
+ * gtm_get_specific_timer16 - request specific GTM timer
  * @gtm:	specific GTM, pass here GTM's device_node->data
  * @timer:	specific timer number, Timer1 is 0.
  * Context:	non-IRQ
···
 EXPORT_SYMBOL(gtm_set_timer16);
 
 /**
- * gtm_set_exact_utimer16 - (re)set 16 bits timer
+ * gtm_set_exact_timer16 - (re)set 16 bits timer
  * @tmr:	pointer to the gtm_timer structure obtained from gtm_get_timer
  * @usec:	timer interval in microseconds
  * @reload:	if set, the timer will reset upon expiry rather than

arch/powerpc/sysdev/fsl_msi.c

···
 	.msiir_offset = 0x38,
 };
 
+#ifdef CONFIG_EPAPR_PARAVIRT
 static const struct fsl_msi_feature vmpic_msi_feature = {
 	.fsl_pic_ip = FSL_PIC_IP_VMPIC,
 	.msiir_offset = 0,
 };
+#endif
 
 static const struct of_device_id fsl_of_msi_ids[] = {
 	{

arch/powerpc/sysdev/xive/common.c

···
  * CPU.
  *
  * If we find that there is indeed more in there, we call
- * force_external_irq_replay() to make Linux synthetize an
+ * force_external_irq_replay() to make Linux synthesize an
  * external interrupt on the next call to local_irq_restore().
  */
 static void xive_do_queue_eoi(struct xive_cpu *xc)
···
 		 *
 		 * This also tells us that it's in flight to a host queue
 		 * or has already been fetched but hasn't been EOIed yet
-		 * by the host. This it's potentially using up a host
+		 * by the host. Thus it's potentially using up a host
 		 * queue slot. This is important to know because as long
 		 * as this is the case, we must not hard-unmask it when
 		 * "returning" that interrupt to the host.

arch/powerpc/sysdev/xive/native.c

···
 		return;
 	}
 
-	/* Grab it's CAM value */
+	/* Grab its CAM value */
 	rc = opal_xive_get_vp_info(vp, NULL, &vp_cam_be, NULL, NULL);
 	if (rc) {
 		pr_err("Failed to get pool VP info CPU %d\n", cpu);

arch/powerpc/xmon/Makefile

···
 # Disable ftrace for the entire directory
 ccflags-remove-$(CONFIG_FUNCTION_TRACER) += $(CC_FLAGS_FTRACE)
 
-ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC)
-
 # Clang stores addresses on the stack causing the frame size to blow
 # out. See https://github.com/ClangBuiltLinux/linux/issues/252
 ccflags-$(CONFIG_CC_IS_CLANG) += -Wframe-larger-than=4096

arch/powerpc/xmon/xmon.c

···
 	}
 	termch = cpu;
 
-	if (!scanhex(&cpu)) {
+	if (!scanhex(&cpu) || cpu >= num_possible_cpus()) {
 		/* print cpus waiting or in xmon */
 		printf("cpus stopped:");
 		last_cpu = first_cpu = NR_CPUS;
···
 
 	termch = c;	/* Put c back, it wasn't 'a' */
 
-	if (scanhex(&num))
+	if (scanhex(&num) && num < num_possible_cpus())
 		dump_one_paca(num);
 	else
 		dump_one_paca(xmon_owner);
···
 
 	termch = c;	/* Put c back, it wasn't 'a' */
 
-	if (scanhex(&num))
+	if (scanhex(&num) && num < num_possible_cpus())
 		dump_one_xive(num);
 	else
 		dump_one_xive(xmon_owner);

arch/x86/include/asm/kexec.h

···
 extern void kdump_nmi_shootdown_cpus(void);
 
 #ifdef CONFIG_CRASH_HOTPLUG
-void arch_crash_handle_hotplug_event(struct kimage *image);
+void arch_crash_handle_hotplug_event(struct kimage *image, void *arg);
 #define arch_crash_handle_hotplug_event arch_crash_handle_hotplug_event
 
-#ifdef CONFIG_HOTPLUG_CPU
-int arch_crash_hotplug_cpu_support(void);
-#define crash_hotplug_cpu_support arch_crash_hotplug_cpu_support
-#endif
-
-#ifdef CONFIG_MEMORY_HOTPLUG
-int arch_crash_hotplug_memory_support(void);
-#define crash_hotplug_memory_support arch_crash_hotplug_memory_support
-#endif
+int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags);
+#define arch_crash_hotplug_support arch_crash_hotplug_support
 
 unsigned int arch_crash_get_elfcorehdr_size(void);
 #define crash_get_elfcorehdr_size arch_crash_get_elfcorehdr_size

arch/x86/kernel/crash.c

···
 #undef pr_fmt
 #define pr_fmt(fmt) "crash hp: " fmt
 
-/* These functions provide the value for the sysfs crash_hotplug nodes */
-#ifdef CONFIG_HOTPLUG_CPU
-int arch_crash_hotplug_cpu_support(void)
+int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags)
 {
-	return crash_check_update_elfcorehdr();
-}
-#endif
 
-#ifdef CONFIG_MEMORY_HOTPLUG
-int arch_crash_hotplug_memory_support(void)
-{
-	return crash_check_update_elfcorehdr();
-}
+#ifdef CONFIG_KEXEC_FILE
+	if (image->file_mode)
+		return 1;
 #endif
+	/*
+	 * Initially, crash hotplug support for kexec_load was added
+	 * with the KEXEC_UPDATE_ELFCOREHDR flag. Later, this
+	 * functionality was expanded to accommodate multiple kexec
+	 * segment updates, leading to the introduction of the
+	 * KEXEC_CRASH_HOTPLUG_SUPPORT kexec flag bit. Consequently,
+	 * when the kexec tool sends either of these flags, it indicates
+	 * that the required kexec segment (elfcorehdr) is excluded from
+	 * the SHA calculation.
+	 */
+	return (kexec_flags & KEXEC_UPDATE_ELFCOREHDR ||
+		kexec_flags & KEXEC_CRASH_HOTPLUG_SUPPORT);
+}
 
 unsigned int arch_crash_get_elfcorehdr_size(void)
 {
···
 /**
  * arch_crash_handle_hotplug_event() - Handle hotplug elfcorehdr changes
  * @image: a pointer to kexec_crash_image
+ * @arg: struct memory_notify handler for memory hotplug case and
+ *       NULL for CPU hotplug case.
  *
  * Prepare the new elfcorehdr and replace the existing elfcorehdr.
  */
-void arch_crash_handle_hotplug_event(struct kimage *image)
+void arch_crash_handle_hotplug_event(struct kimage *image, void *arg)
 {
 	void *elfbuf = NULL, *old_elfcorehdr;
 	unsigned long nr_mem_ranges;

drivers/base/cpu.c

···
 				     struct device_attribute *attr,
 				     char *buf)
 {
-	return sysfs_emit(buf, "%d\n", crash_hotplug_cpu_support());
+	return sysfs_emit(buf, "%d\n", crash_check_hotplug_support());
 }
 static DEVICE_ATTR_ADMIN_RO(crash_hotplug);
 #endif

drivers/base/memory.c

···
 static ssize_t crash_hotplug_show(struct device *dev,
 				       struct device_attribute *attr, char *buf)
 {
-	return sysfs_emit(buf, "%d\n", crash_hotplug_memory_support());
+	return sysfs_emit(buf, "%d\n", crash_check_hotplug_support());
 }
 static DEVICE_ATTR_RO(crash_hotplug);
 #endif

drivers/cpufreq/pmac32-cpufreq.c

···
 
 		/* tweak L2 for high voltage */
 		if (has_cpu_l2lve) {
-			hid2 = mfspr(SPRN_HID2);
+			hid2 = mfspr(SPRN_HID2_750FX);
 			hid2 &= ~0x2000;
-			mtspr(SPRN_HID2, hid2);
+			mtspr(SPRN_HID2_750FX, hid2);
 		}
 	}
 #ifdef CONFIG_PPC_BOOK3S_32
···
 	if (low_speed == 1) {
 		/* tweak L2 for low voltage */
 		if (has_cpu_l2lve) {
-			hid2 = mfspr(SPRN_HID2);
+			hid2 = mfspr(SPRN_HID2_750FX);
 			hid2 |= 0x2000;
-			mtspr(SPRN_HID2, hid2);
+			mtspr(SPRN_HID2_750FX, hid2);
 		}
 
 		/* ramping down, set voltage last */

drivers/macintosh/Kconfig

···
 	  will be called ams.
 
 config SENSORS_AMS_PMU
-	bool "PMU variant"
+	bool "PMU variant" if SENSORS_AMS_I2C
 	depends on SENSORS_AMS && ADB_PMU
 	default y
 	help

drivers/macintosh/macio-adb.c

···
 
 int macio_probe(void)
 {
-	struct device_node *np;
+	struct device_node *np __free(device_node) =
+		of_find_compatible_node(NULL, "adb", "chrp,adb0");
 
-	np = of_find_compatible_node(NULL, "adb", "chrp,adb0");
-	if (np) {
-		of_node_put(np);
+	if (np)
 		return 0;
-	}
+
 	return -ENODEV;
 }
 
 int macio_init(void)
 {
-	struct device_node *adbs;
+	struct device_node *adbs __free(device_node) =
+		of_find_compatible_node(NULL, "adb", "chrp,adb0");
 	struct resource r;
 	unsigned int irq;
 
-	adbs = of_find_compatible_node(NULL, "adb", "chrp,adb0");
 	if (!adbs)
 		return -ENXIO;
 
-	if (of_address_to_resource(adbs, 0, &r)) {
-		of_node_put(adbs);
+	if (of_address_to_resource(adbs, 0, &r))
 		return -ENXIO;
-	}
+
 	adb = ioremap(r.start, sizeof(struct adb_regs));
-	if (!adb) {
-		of_node_put(adbs);
+	if (!adb)
 		return -ENOMEM;
-	}
+
 
 	out_8(&adb->ctrl.r, 0);
 	out_8(&adb->intr.r, 0);
···
 	out_8(&adb->autopoll.r, APE);
 
 	irq = irq_of_parse_and_map(adbs, 0);
-	of_node_put(adbs);
 	if (request_irq(irq, macio_adb_interrupt, 0, "ADB", (void *)0)) {
 		iounmap(adb);
 		printk(KERN_ERR "ADB: can't get irq %d\n", irq);

include/linux/crash_core.h

···
 
 
 #ifndef arch_crash_handle_hotplug_event
-static inline void arch_crash_handle_hotplug_event(struct kimage *image) { }
+static inline void arch_crash_handle_hotplug_event(struct kimage *image, void *arg) { }
 #endif
 
-int crash_check_update_elfcorehdr(void);
+int crash_check_hotplug_support(void);
 
-#ifndef crash_hotplug_cpu_support
-static inline int crash_hotplug_cpu_support(void) { return 0; }
-#endif
-
-#ifndef crash_hotplug_memory_support
-static inline int crash_hotplug_memory_support(void) { return 0; }
+#ifndef arch_crash_hotplug_support
+static inline int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags)
+{
+	return 0;
+}
 #endif
 
 #ifndef crash_get_elfcorehdr_size

include/linux/kexec.h

···
 	/* If set, we are using file mode kexec syscall */
 	unsigned int file_mode:1;
 #ifdef CONFIG_CRASH_HOTPLUG
-	/* If set, allow changes to elfcorehdr of kexec_load'd image */
-	unsigned int update_elfcorehdr:1;
+	/* If set, it is safe to update kexec segments that are
+	 * excluded from SHA calculation.
+	 */
+	unsigned int hotplug_support:1;
 #endif
 
 #ifdef ARCH_HAS_KIMAGE_ARCH
···
 
 /* List of defined/legal kexec flags */
 #ifndef CONFIG_KEXEC_JUMP
-#define KEXEC_FLAGS    (KEXEC_ON_CRASH | KEXEC_UPDATE_ELFCOREHDR)
+#define KEXEC_FLAGS    (KEXEC_ON_CRASH | KEXEC_UPDATE_ELFCOREHDR | KEXEC_CRASH_HOTPLUG_SUPPORT)
 #else
-#define KEXEC_FLAGS    (KEXEC_ON_CRASH | KEXEC_PRESERVE_CONTEXT | KEXEC_UPDATE_ELFCOREHDR)
+#define KEXEC_FLAGS    (KEXEC_ON_CRASH | KEXEC_PRESERVE_CONTEXT | KEXEC_UPDATE_ELFCOREHDR | \
+			KEXEC_CRASH_HOTPLUG_SUPPORT)
 #endif
 
 /* List of defined/legal kexec file flags */

include/uapi/linux/kexec.h

···
 #define KEXEC_ON_CRASH		0x00000001
 #define KEXEC_PRESERVE_CONTEXT	0x00000002
 #define KEXEC_UPDATE_ELFCOREHDR	0x00000004
+#define KEXEC_CRASH_HOTPLUG_SUPPORT 0x00000008
 #define KEXEC_ARCH_MASK		0xffff0000
 
 /*

include/uapi/linux/kvm.h

···
 /* Available with KVM_CAP_SPAPR_RESIZE_HPT */
 #define KVM_PPC_RESIZE_HPT_PREPARE _IOR(KVMIO, 0xad, struct kvm_ppc_resize_hpt)
 #define KVM_PPC_RESIZE_HPT_COMMIT  _IOR(KVMIO, 0xae, struct kvm_ppc_resize_hpt)
-/* Available with KVM_CAP_PPC_RADIX_MMU or KVM_CAP_PPC_HASH_MMU_V3 */
+/* Available with KVM_CAP_PPC_MMU_RADIX or KVM_CAP_PPC_MMU_HASH_V3 */
 #define KVM_PPC_CONFIGURE_V3_MMU  _IOW(KVMIO,  0xaf, struct kvm_ppc_mmuv3_cfg)
-/* Available with KVM_CAP_PPC_RADIX_MMU */
+/* Available with KVM_CAP_PPC_MMU_RADIX */
 #define KVM_PPC_GET_RMMU_INFO	  _IOW(KVMIO,  0xb0, struct kvm_ppc_rmmu_info)
 /* Available with KVM_CAP_PPC_GET_CPU_CHAR */
 #define KVM_PPC_GET_CPU_CHAR	  _IOR(KVMIO,  0xb1, struct kvm_ppc_cpu_char)

include/uapi/linux/prctl.h

···
 # define PR_RISCV_V_VSTATE_CTRL_NEXT_MASK	0xc
 # define PR_RISCV_V_VSTATE_CTRL_MASK		0x1f
 
+/* PowerPC Dynamic Execution Control Register (DEXCR) controls */
+#define PR_PPC_GET_DEXCR		72
+#define PR_PPC_SET_DEXCR		73
+/* DEXCR aspect to act on */
+# define PR_PPC_DEXCR_SBHE		0 /* Speculative branch hint enable */
+# define PR_PPC_DEXCR_IBRTPD		1 /* Indirect branch recurrent target prediction disable */
+# define PR_PPC_DEXCR_SRAPD		2 /* Subroutine return address prediction disable */
+# define PR_PPC_DEXCR_NPHIE		3 /* Non-privileged hash instruction enable */
+/* Action to apply / return */
+# define PR_PPC_DEXCR_CTRL_EDITABLE	 0x1 /* Aspect can be modified with PR_PPC_SET_DEXCR */
+# define PR_PPC_DEXCR_CTRL_SET		 0x2 /* Set the aspect for this process */
+# define PR_PPC_DEXCR_CTRL_CLEAR	 0x4 /* Clear the aspect for this process */
+# define PR_PPC_DEXCR_CTRL_SET_ONEXEC	 0x8 /* Set the aspect on exec */
+# define PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC	0x10 /* Clear the aspect on exec */
+# define PR_PPC_DEXCR_CTRL_MASK		0x1f
+
 #endif /* _LINUX_PRCTL_H */

kernel/crash_core.c

···
 
 /*
  * This routine utilized when the crash_hotplug sysfs node is read.
- * It reflects the kernel's ability/permission to update the crash
- * elfcorehdr directly.
+ * It reflects the kernel's ability/permission to update the kdump
+ * image directly.
  */
-int crash_check_update_elfcorehdr(void)
+int crash_check_hotplug_support(void)
 {
 	int rc = 0;
 
···
 		return 0;
 	}
 	if (kexec_crash_image) {
-		if (kexec_crash_image->file_mode)
-			rc = 1;
-		else
-			rc = kexec_crash_image->update_elfcorehdr;
+		rc = kexec_crash_image->hotplug_support;
 	}
 	/* Release lock now that update complete */
 	kexec_unlock();
···
  * list of segments it checks (since the elfcorehdr changes and thus
  * would require an update to purgatory itself to update the digest).
  */
-static void crash_handle_hotplug_event(unsigned int hp_action, unsigned int cpu)
+static void crash_handle_hotplug_event(unsigned int hp_action, unsigned int cpu, void *arg)
 {
 	struct kimage *image;
 
···
 
 	image = kexec_crash_image;
 
-	/* Check that updating elfcorehdr is permitted */
-	if (!(image->file_mode || image->update_elfcorehdr))
+	/* Check that kexec segments update is permitted */
+	if (!image->hotplug_support)
 		goto out;
 
 	if (hp_action == KEXEC_CRASH_HP_ADD_CPU ||
···
 	image->hp_action = hp_action;
 
 	/* Now invoke arch-specific update handler */
-	arch_crash_handle_hotplug_event(image);
+	arch_crash_handle_hotplug_event(image, arg);
 
 	/* No longer handling a hotplug event */
 	image->hp_action = KEXEC_CRASH_HP_NONE;
···
 	crash_hotplug_unlock();
 }
 
-static int crash_memhp_notifier(struct notifier_block *nb, unsigned long val, void *v)
+static int crash_memhp_notifier(struct notifier_block *nb, unsigned long val, void *arg)
 {
 	switch (val) {
 	case MEM_ONLINE:
 		crash_handle_hotplug_event(KEXEC_CRASH_HP_ADD_MEMORY,
-			KEXEC_CRASH_HP_INVALID_CPU);
+			KEXEC_CRASH_HP_INVALID_CPU, arg);
 		break;
 
 	case MEM_OFFLINE:
 		crash_handle_hotplug_event(KEXEC_CRASH_HP_REMOVE_MEMORY,
-			KEXEC_CRASH_HP_INVALID_CPU);
+			KEXEC_CRASH_HP_INVALID_CPU, arg);
 		break;
 	}
 	return NOTIFY_OK;
···
 
 static int crash_cpuhp_online(unsigned int cpu)
 {
-	crash_handle_hotplug_event(KEXEC_CRASH_HP_ADD_CPU, cpu);
+	crash_handle_hotplug_event(KEXEC_CRASH_HP_ADD_CPU, cpu, NULL);
 	return 0;
 }
 
 static int crash_cpuhp_offline(unsigned int cpu)
 {
-	crash_handle_hotplug_event(KEXEC_CRASH_HP_REMOVE_CPU, cpu);
+	crash_handle_hotplug_event(KEXEC_CRASH_HP_REMOVE_CPU, cpu, NULL);
 	return 0;
 }
 

kernel/kexec.c

···
 		image->preserve_context = 1;
 
 #ifdef CONFIG_CRASH_HOTPLUG
-	if (flags & KEXEC_UPDATE_ELFCOREHDR)
-		image->update_elfcorehdr = 1;
+	if ((flags & KEXEC_ON_CRASH) && arch_crash_hotplug_support(image, flags))
+		image->hotplug_support = 1;
 #endif
 
 	ret = machine_kexec_prepare(image);

kernel/kexec_file.c

···
 	if (ret)
 		goto out;
 
+#ifdef CONFIG_CRASH_HOTPLUG
+	if ((flags & KEXEC_FILE_ON_CRASH) && arch_crash_hotplug_support(image, flags))
+		image->hotplug_support = 1;
+#endif
+
 	ret = machine_kexec_prepare(image);
 	if (ret)
 		goto out;

kernel/sys.c

···
 #ifndef RISCV_V_GET_CONTROL
 # define RISCV_V_GET_CONTROL()		(-EINVAL)
 #endif
+#ifndef PPC_GET_DEXCR_ASPECT
+# define PPC_GET_DEXCR_ASPECT(a, b)	(-EINVAL)
+#endif
+#ifndef PPC_SET_DEXCR_ASPECT
+# define PPC_SET_DEXCR_ASPECT(a, b, c)	(-EINVAL)
+#endif
 
 /*
  * this is where the system-wide overflow UID and GID are defined, for
···
 		break;
 	case PR_GET_MDWE:
 		error = prctl_get_mdwe(arg2, arg3, arg4, arg5);
+		break;
+	case PR_PPC_GET_DEXCR:
+		if (arg3 || arg4 || arg5)
+			return -EINVAL;
+		error = PPC_GET_DEXCR_ASPECT(me, arg2);
+		break;
+	case PR_PPC_SET_DEXCR:
+		if (arg4 || arg5)
+			return -EINVAL;
+		error = PPC_SET_DEXCR_ASPECT(me, arg2, arg3);
 		break;
 	case PR_SET_VMA:
 		error = prctl_set_vma(arg2, arg3, arg4, arg5);

tools/include/uapi/linux/kvm.h

···
 /* Available with KVM_CAP_SPAPR_RESIZE_HPT */
 #define KVM_PPC_RESIZE_HPT_PREPARE _IOR(KVMIO, 0xad, struct kvm_ppc_resize_hpt)
 #define KVM_PPC_RESIZE_HPT_COMMIT  _IOR(KVMIO, 0xae, struct kvm_ppc_resize_hpt)
-/* Available with KVM_CAP_PPC_RADIX_MMU or KVM_CAP_PPC_HASH_MMU_V3 */
+/* Available with KVM_CAP_PPC_RADIX_MMU or KVM_CAP_PPC_MMU_HASH_V3 */
 #define KVM_PPC_CONFIGURE_V3_MMU  _IOW(KVMIO,  0xaf, struct kvm_ppc_mmuv3_cfg)
 /* Available with KVM_CAP_PPC_RADIX_MMU */
 #define KVM_PPC_GET_RMMU_INFO	  _IOW(KVMIO,  0xb0, struct kvm_ppc_rmmu_info)

tools/testing/selftests/powerpc/Makefile

···
 
 ifeq ($(ARCH),powerpc)
 
-GIT_VERSION = $(shell git describe --always --long --dirty || echo "unknown")
-
-CFLAGS := -std=gnu99 -O2 -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CURDIR)/include $(CFLAGS)
-
-export CFLAGS
-
 SUB_DIRS = alignment		\
 	   benchmarks		\
 	   cache_shape		\
···
 	BUILD_TARGET=$(OUTPUT)/$@; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -k -C $@ all
 
 include ../lib.mk
+include ./flags.mk
 
 override define RUN_TESTS
 	+@for TARGET in $(SUB_DIRS); do \
···
 override define INSTALL_RULE
 	+@for TARGET in $(SUB_DIRS); do \
 		BUILD_TARGET=$(OUTPUT)/$$TARGET;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET install;\
+		$(MAKE) OUTPUT=$$BUILD_TARGET INSTALL_PATH=$$INSTALL_PATH/$$TARGET -C $$TARGET install;\
 	done;
 endef
 
 emit_tests:
 	+@for TARGET in $(SUB_DIRS); do \
 		BUILD_TARGET=$(OUTPUT)/$$TARGET;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET $@;\
+		$(MAKE) OUTPUT=$$BUILD_TARGET COLLECTION=$(COLLECTION)/$$TARGET -s -C $$TARGET $@;\
 	done;
 
 override define CLEAN

tools/testing/selftests/powerpc/alignment/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c

tools/testing/selftests/powerpc/benchmarks/Makefile

···
 
 TEST_FILES := settings
 
-CFLAGS += -O2
-
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
+
+CFLAGS += -O2
 
 $(TEST_GEN_PROGS): ../harness.c
 

tools/testing/selftests/powerpc/cache_shape/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c

tools/testing/selftests/powerpc/copyloops/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
-# The loops are all 64-bit code
-CFLAGS += -m64
-CFLAGS += -I$(CURDIR)
-CFLAGS += -D SELFTEST
-CFLAGS += -maltivec
-CFLAGS += -mcpu=power4
-
-# Use our CFLAGS for the implicit .S rule & set the asm machine type
-ASFLAGS = $(CFLAGS) -Wa,-mpower4
-
 TEST_GEN_PROGS := copyuser_64_t0 copyuser_64_t1 copyuser_64_t2 \
 		copyuser_p7_t0 copyuser_p7_t1 \
 		memcpy_64_t0 memcpy_64_t1 memcpy_64_t2 \
···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
+
+# The loops are all 64-bit code
+CFLAGS += -m64
+CFLAGS += -I$(CURDIR)
+CFLAGS += -D SELFTEST
+CFLAGS += -maltivec
+CFLAGS += -mcpu=power4
+
+# Use our CFLAGS for the implicit .S rule & set the asm machine type
+ASFLAGS = $(CFLAGS) -Wa,-mpower4
 
 $(OUTPUT)/copyuser_64_t%:	copyuser_64.S $(EXTRA_SOURCES)
 	$(CC) $(CPPFLAGS) $(CFLAGS) \

tools/testing/selftests/powerpc/dexcr/.gitignore

···
+dexcr_test
 hashchk_test
+chdexcr
 lsdexcr

tools/testing/selftests/powerpc/dexcr/Makefile

···
-TEST_GEN_PROGS := hashchk_test
-TEST_GEN_FILES := lsdexcr
+TEST_GEN_PROGS := dexcr_test hashchk_test
+TEST_GEN_FILES := lsdexcr chdexcr
 
 include ../../lib.mk
+include ../flags.mk
 
-$(OUTPUT)/hashchk_test: CFLAGS += -fno-pie $(call cc-option,-mno-rop-protect)
+CFLAGS += $(KHDR_INCLUDES)
+
+$(OUTPUT)/hashchk_test: CFLAGS += -fno-pie -no-pie $(call cc-option,-mno-rop-protect)
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c ./dexcr.c
 $(TEST_GEN_FILES): ../utils.c ./dexcr.c

tools/testing/selftests/powerpc/dexcr/chdexcr.c

···
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/prctl.h>
+
+#include "dexcr.h"
+#include "utils.h"
+
+static void die(const char *msg)
+{
+	printf("%s\n", msg);
+	exit(1);
+}
+
+static void help(void)
+{
+	printf("Invoke a provided program with a custom DEXCR on-exec reset value\n"
+	       "\n"
+	       "usage: chdexcr [CHDEXCR OPTIONS] -- PROGRAM [ARGS...]\n"
+	       "\n"
+	       "Each configurable DEXCR aspect is exposed as an option.\n"
+	       "\n"
+	       "The normal option sets the aspect in the DEXCR. The --no- variant\n"
+	       "clears that aspect. For example, --ibrtpd sets the IBRTPD aspect bit,\n"
+	       "so indirect branch prediction will be disabled in the provided program.\n"
+	       "Conversely, --no-ibrtpd clears the aspect bit, so indirect branch\n"
+	       "prediction may occur.\n"
+	       "\n"
+	       "CHDEXCR OPTIONS:\n");
+
+	for (int i = 0; i < ARRAY_SIZE(aspects); i++) {
+		const struct dexcr_aspect *aspect = &aspects[i];
+
+		if (aspect->prctl == -1)
+			continue;
+
+		printf("  --%-6s / --no-%-6s : %s\n", aspect->opt, aspect->opt, aspect->desc);
+	}
+}
+
+static const struct dexcr_aspect *opt_to_aspect(const char *opt)
+{
+	for (int i = 0; i < ARRAY_SIZE(aspects); i++)
+		if (aspects[i].prctl != -1 && !strcmp(aspects[i].opt, opt))
+			return &aspects[i];
+
+	return NULL;
+}
+
+static int apply_option(const char *option)
+{
+	const struct dexcr_aspect *aspect;
+	const char *opt = NULL;
+	const char *set_prefix = "--";
+	const char *clear_prefix = "--no-";
+	unsigned long ctrl = 0;
+	int err;
+
+	if (!strcmp(option, "-h") || !strcmp(option, "--help")) {
+		help();
+		exit(0);
+	}
+
+	/* Strip out --(no-) prefix and determine ctrl value */
+	if (!strncmp(option, clear_prefix, strlen(clear_prefix))) {
+		opt = &option[strlen(clear_prefix)];
+		ctrl |= PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC;
+	} else if (!strncmp(option, set_prefix, strlen(set_prefix))) {
+		opt = &option[strlen(set_prefix)];
+		ctrl |= PR_PPC_DEXCR_CTRL_SET_ONEXEC;
+	}
+
+	if (!opt || !*opt)
+		return 1;
+
+	aspect = opt_to_aspect(opt);
+	if (!aspect)
+		die("unknown aspect");
+
+	err = pr_set_dexcr(aspect->prctl, ctrl);
+	if (err)
+		die("failed to apply option");
+
+	return 0;
+}
+
+int main(int argc, char *const argv[])
+{
+	int i;
+
+	if (!dexcr_exists())
+		die("DEXCR not detected on this hardware");
+
+	for (i = 1; i < argc; i++)
+		if (apply_option(argv[i]))
+			break;
+
+	if (i < argc && !strcmp(argv[i], "--"))
+		i++;
+
+	if (i >= argc)
+		die("missing command");
+
+	execvp(argv[i], &argv[i]);
+	perror("execve");
+
+	return errno;
+}

tools/testing/selftests/powerpc/dexcr/dexcr.c

···
 #include <errno.h>
 #include <setjmp.h>
 #include <signal.h>
+#include <sys/prctl.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 
···
 out:
 	pop_signal_handler(SIGILL, old);
 	return exists;
+}
+
+unsigned int pr_which_to_aspect(unsigned long which)
+{
+	switch (which) {
+	case PR_PPC_DEXCR_SBHE:
+		return DEXCR_PR_SBHE;
+	case PR_PPC_DEXCR_IBRTPD:
+		return DEXCR_PR_IBRTPD;
+	case PR_PPC_DEXCR_SRAPD:
+		return DEXCR_PR_SRAPD;
+	case PR_PPC_DEXCR_NPHIE:
+		return DEXCR_PR_NPHIE;
+	default:
+		FAIL_IF_EXIT_MSG(true, "unknown PR aspect");
+	}
+}
+
+int pr_get_dexcr(unsigned long which)
+{
+	return prctl(PR_PPC_GET_DEXCR, which, 0UL, 0UL, 0UL);
+}
+
+int pr_set_dexcr(unsigned long which, unsigned long ctrl)
+{
+	return prctl(PR_PPC_SET_DEXCR, which, ctrl, 0UL, 0UL);
+}
+
+bool pr_dexcr_aspect_supported(unsigned long which)
+{
+	if (pr_get_dexcr(which) == -1)
+		return errno == ENODEV;
+
+	return true;
+}
+
+bool pr_dexcr_aspect_editable(unsigned long which)
+{
+	return pr_get_dexcr(which) & PR_PPC_DEXCR_CTRL_EDITABLE;
 }
 
 /*

tools/testing/selftests/powerpc/dexcr/dexcr.h

···
 #define _SELFTESTS_POWERPC_DEXCR_DEXCR_H
 
 #include <stdbool.h>
+#include <sys/prctl.h>
 #include <sys/types.h>
 
 #include "reg.h"
···
 #define PPC_RAW_HASHCHK(b, i, a) \
 	str(.long (0x7C0005E4 | PPC_RAW_HASH_ARGS(b, i, a));)
 
+struct dexcr_aspect {
+	const char *name;	/* Short display name */
+	const char *opt;	/* Option name for chdexcr */
+	const char *desc;	/* Expanded aspect meaning */
+	unsigned int index;	/* Aspect bit index in DEXCR */
+	unsigned long prctl;	/* 'which' value for get/set prctl */
+};
+
+static const struct dexcr_aspect aspects[] = {
+	{
+		.name = "SBHE",
+		.opt = "sbhe",
+		.desc = "Speculative branch hint enable",
+		.index = 0,
+		.prctl = PR_PPC_DEXCR_SBHE,
+	},
+	{
+		.name = "IBRTPD",
+		.opt = "ibrtpd",
+		.desc = "Indirect branch recurrent target prediction disable",
+		.index = 3,
+		.prctl = PR_PPC_DEXCR_IBRTPD,
+	},
+	{
+		.name = "SRAPD",
+		.opt = "srapd",
+		.desc = "Subroutine return address prediction disable",
+		.index = 4,
+		.prctl = PR_PPC_DEXCR_SRAPD,
+	},
+	{
+		.name = "NPHIE",
+		.opt = "nphie",
+		.desc = "Non-privileged hash instruction enable",
+		.index = 5,
+		.prctl = PR_PPC_DEXCR_NPHIE,
+	},
+	{
+		.name = "PHIE",
+		.opt = "phie",
+		.desc = "Privileged hash instruction enable",
+		.index = 6,
+		.prctl = -1,
+	},
+};
+
 bool dexcr_exists(void);
+
+bool pr_dexcr_aspect_supported(unsigned long which);
+
+bool pr_dexcr_aspect_editable(unsigned long which);
+
+int pr_get_dexcr(unsigned long pr_aspect);
+
+int pr_set_dexcr(unsigned long pr_aspect, unsigned long ctrl);
+
+unsigned int pr_which_to_aspect(unsigned long which);
 
 bool hashchk_triggers(void);
 

tools/testing/selftests/powerpc/dexcr/dexcr_test.c

···
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/prctl.h>
+#include <unistd.h>
+
+#include "dexcr.h"
+#include "utils.h"
+
+/*
+ * Helper function for testing the behaviour of a newly exec-ed process
+ */
+static int dexcr_prctl_onexec_test_child(unsigned long which, const char *status)
+{
+	unsigned long dexcr = mfspr(SPRN_DEXCR_RO);
+	unsigned long aspect = pr_which_to_aspect(which);
+	int ctrl = pr_get_dexcr(which);
+
+	if (!strcmp(status, "set")) {
+		FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET),
+				 "setting aspect across exec not applied");
+
+		FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC),
+				 "setting aspect across exec not inherited");
+
+		FAIL_IF_EXIT_MSG(!(aspect & dexcr), "setting aspect across exec did not take effect");
+	} else if (!strcmp(status, "clear")) {
+		FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR),
+				 "clearing aspect across exec not applied");
+
+		FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC),
+				 "clearing aspect across exec not inherited");
+
+		FAIL_IF_EXIT_MSG(aspect & dexcr, "clearing aspect across exec did not take effect");
+	} else {
+		FAIL_IF_EXIT_MSG(true, "unknown expected status");
+	}
+
+	return 0;
+}
+
+/*
+ * Test that the given prctl value can be manipulated freely
+ */
+static int dexcr_prctl_aspect_test(unsigned long which)
+{
+	unsigned long aspect = pr_which_to_aspect(which);
+	pid_t pid;
+	int ctrl;
+	int err;
+	int errno_save;
+
+	SKIP_IF_MSG(!dexcr_exists(), "DEXCR not supported");
+	SKIP_IF_MSG(!pr_dexcr_aspect_supported(which), "DEXCR aspect not supported");
+	SKIP_IF_MSG(!pr_dexcr_aspect_editable(which), "DEXCR aspect not editable with prctl");
+
+	/* We reject invalid combinations of arguments */
+	err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR);
+	errno_save = errno;
+	FAIL_IF_MSG(err != -1, "simultaneous set and clear should be rejected");
+	FAIL_IF_MSG(errno_save != EINVAL, "simultaneous set and clear should be rejected with EINVAL");
+
+	err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET_ONEXEC | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC);
+	errno_save = errno;
+	FAIL_IF_MSG(err != -1, "simultaneous set and clear on exec should be rejected");
+	FAIL_IF_MSG(errno_save != EINVAL, "simultaneous set and clear on exec should be rejected with EINVAL");
+
+	/* We set the aspect */
+	err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET);
+	FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_SET failed");
+
+	ctrl = pr_get_dexcr(which);
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET), "config value not PR_PPC_DEXCR_CTRL_SET");
+	FAIL_IF_MSG(ctrl & PR_PPC_DEXCR_CTRL_CLEAR, "config value unexpected clear flag");
+	FAIL_IF_MSG(!(aspect & mfspr(SPRN_DEXCR_RO)), "setting aspect did not take effect");
+
+	/* We clear the aspect */
+	err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_CLEAR);
+	FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_CLEAR failed");
+
+	ctrl = pr_get_dexcr(which);
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR), "config value not PR_PPC_DEXCR_CTRL_CLEAR");
+	FAIL_IF_MSG(ctrl & PR_PPC_DEXCR_CTRL_SET, "config value unexpected set flag");
+	FAIL_IF_MSG(aspect & mfspr(SPRN_DEXCR_RO), "clearing aspect did not take effect");
+
+	/* We make it set on exec (doesn't change our current value) */
+	err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET_ONEXEC);
+	FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_SET_ONEXEC failed");
+
+	ctrl = pr_get_dexcr(which);
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR), "process aspect should still be cleared");
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC), "config value not PR_PPC_DEXCR_CTRL_SET_ONEXEC");
+	FAIL_IF_MSG(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC, "config value unexpected clear on exec flag");
+	FAIL_IF_MSG(aspect & mfspr(SPRN_DEXCR_RO), "scheduling aspect to set on exec should not change it now");
+
+	/* We make it clear on exec (doesn't change our current value) */
+	err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC);
+	FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC failed");
+
+	ctrl = pr_get_dexcr(which);
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR), "process aspect config should still be cleared");
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC), "config value not PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC");
+	FAIL_IF_MSG(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC, "config value unexpected set on exec flag");
+	FAIL_IF_MSG(aspect & mfspr(SPRN_DEXCR_RO), "process aspect should still be cleared");
+
+	/* We allow setting the current and on-exec value in a single call */
+	err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC);
+	FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC failed");
+
+	ctrl = pr_get_dexcr(which);
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET), "config value not PR_PPC_DEXCR_CTRL_SET");
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC), "config value not PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC");
+	FAIL_IF_MSG(!(aspect & mfspr(SPRN_DEXCR_RO)), "process aspect should be set");
+
+	err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_CLEAR | PR_PPC_DEXCR_CTRL_SET_ONEXEC);
+	FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_CLEAR | PR_PPC_DEXCR_CTRL_SET_ONEXEC failed");
+
+	ctrl = pr_get_dexcr(which);
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR), "config value not PR_PPC_DEXCR_CTRL_CLEAR");
+	FAIL_IF_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC), "config value not PR_PPC_DEXCR_CTRL_SET_ONEXEC");
+	FAIL_IF_MSG(aspect & mfspr(SPRN_DEXCR_RO), "process aspect should be clear");
+
+	/* Verify the onexec value is applied across exec */
+	pid = fork();
+	if (!pid) {
+		char which_str[32] = {};
+		char *args[] = { "dexcr_prctl_onexec_test_child", which_str, "set", NULL };
+		unsigned int ctrl = pr_get_dexcr(which);
+
+		sprintf(which_str, "%lu", which);
+
+		FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_SET_ONEXEC),
+				 "setting aspect on exec not copied across fork");
+
+		FAIL_IF_EXIT_MSG(mfspr(SPRN_DEXCR_RO) & aspect,
+				 "setting aspect on exec wrongly applied to fork");
+
+		execve("/proc/self/exe", args, NULL);
+		_exit(errno);
+	}
+	await_child_success(pid);
+
+	err = pr_set_dexcr(which, PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC);
+	FAIL_IF_MSG(err, "PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC failed");
+
+	pid = fork();
+	if (!pid) {
+		char which_str[32] = {};
+		char *args[] = { "dexcr_prctl_onexec_test_child", which_str, "clear", NULL };
+		unsigned int ctrl = pr_get_dexcr(which);
+
+		sprintf(which_str, "%lu", which);
+
+		FAIL_IF_EXIT_MSG(!(ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC),
+				 "clearing aspect on exec not copied across fork");
+
+		FAIL_IF_EXIT_MSG(!(mfspr(SPRN_DEXCR_RO) & aspect),
+				 "clearing aspect on exec wrongly applied to fork");
+
+		execve("/proc/self/exe", args, NULL);
+		_exit(errno);
+	}
+	await_child_success(pid);
+
+	return 0;
+}
+
+static int dexcr_prctl_ibrtpd_test(void)
+{
+	return dexcr_prctl_aspect_test(PR_PPC_DEXCR_IBRTPD);
+}
+
+static int dexcr_prctl_srapd_test(void)
+{
+	return dexcr_prctl_aspect_test(PR_PPC_DEXCR_SRAPD);
+}
+
+static int dexcr_prctl_nphie_test(void)
+{
+	return dexcr_prctl_aspect_test(PR_PPC_DEXCR_NPHIE);
+}
+
+int main(int argc, char *argv[])
+{
+	int err = 0;
+
+	/*
+	 * Some tests require checking what happens across exec, so we may be
+	 * invoked as the child of a particular test
+	 */
+	if (argc > 1) {
+		if (argc == 3 && !strcmp(argv[0], "dexcr_prctl_onexec_test_child")) {
+			unsigned long which;
+
+			err = parse_ulong(argv[1], strlen(argv[1]), &which, 10);
+			FAIL_IF_MSG(err, "failed to parse which value for child");
+
+			return dexcr_prctl_onexec_test_child(which, argv[2]);
+		}
+
+		FAIL_IF_MSG(true, "unknown test case");
+	}
+
+	/*
+	 * Otherwise we are the main test invocation and run the full suite
+	 */
+	err |= test_harness(dexcr_prctl_ibrtpd_test, "dexcr_prctl_ibrtpd");
+	err |= test_harness(dexcr_prctl_srapd_test, "dexcr_prctl_srapd");
+	err |= test_harness(dexcr_prctl_nphie_test, "dexcr_prctl_nphie");
+
+	return err;
+}

tools/testing/selftests/powerpc/dexcr/hashchk_test.c

···
 static int require_nphie(void)
 {
 	SKIP_IF_MSG(!dexcr_exists(), "DEXCR not supported");
+
+	pr_set_dexcr(PR_PPC_DEXCR_NPHIE, PR_PPC_DEXCR_CTRL_SET | PR_PPC_DEXCR_CTRL_SET_ONEXEC);
+
+	if (get_dexcr(EFFECTIVE) & DEXCR_PR_NPHIE)
+		return 0;
+
 	SKIP_IF_MSG(!(get_dexcr(EFFECTIVE) & DEXCR_PR_NPHIE),
-		    "DEXCR[NPHIE] not enabled");
+		    "Failed to enable DEXCR[NPHIE]");
 
 	return 0;
 }

tools/testing/selftests/powerpc/dexcr/lsdexcr.c

···
 // SPDX-License-Identifier: GPL-2.0+
 
-#include <errno.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <string.h>
+#include <sys/prctl.h>
 
 #include "dexcr.h"
 #include "utils.h"
···
 static unsigned int dexcr;
 static unsigned int hdexcr;
 static unsigned int effective;
-
-struct dexcr_aspect {
-	const char *name;
-	const char *desc;
-	unsigned int index;
-};
-
-static const struct dexcr_aspect aspects[] = {
-	{
-		.name = "SBHE",
-		.desc = "Speculative branch hint enable",
-		.index = 0,
-	},
-	{
-		.name = "IBRTPD",
-		.desc = "Indirect branch recurrent target prediction disable",
-		.index = 3,
-	},
-	{
-		.name = "SRAPD",
-		.desc = "Subroutine return address prediction disable",
-		.index = 4,
-	},
-	{
-		.name = "NPHIE",
-		.desc = "Non-privileged hash instruction enable",
-		.index = 5,
-	},
-	{
-		.name = "PHIE",
-		.desc = "Privileged hash instruction enable",
-		.index = 6,
-	},
-};
 
 static void print_list(const char *list[], size_t len)
 {
···
 	const char *enabled_aspects[ARRAY_SIZE(aspects) + 1] = {NULL};
 	size_t j = 0;
 
-	printf("%s: %08x", name, bits);
+	printf("%s: 0x%08x", name, bits);
 
 	if (bits == 0) {
 		printf("\n");
···
 	printf("  \t(%s)\n", aspect->desc);
 }
 
+static void print_aspect_config(const struct dexcr_aspect *aspect)
+{
+	const char *reason = NULL;
+	const char *reason_hyp = NULL;
+	const char *reason_prctl = "no prctl";
+	bool actual = effective & DEXCR_PR_BIT(aspect->index);
+	bool expected = actual;  /* Assume it's fine if we don't expect a specific set/clear value */
+
+	if (actual)
+		reason = "set by unknown";
+	else
+		reason = "cleared by unknown";
+
+	if (aspect->prctl != -1) {
+		int ctrl = pr_get_dexcr(aspect->prctl);
+
+		if (ctrl < 0) {
+			reason_prctl = "failed to read prctl";
+		} else {
+			if (ctrl & PR_PPC_DEXCR_CTRL_SET) {
+				reason_prctl = "set by prctl";
+				expected = true;
+			} else if (ctrl & PR_PPC_DEXCR_CTRL_CLEAR) {
+				reason_prctl = "cleared by prctl";
+				expected = false;
+			} else {
+				reason_prctl = "unknown prctl";
+			}
+
+			reason = reason_prctl;
+		}
+	}
+
+	if (hdexcr & DEXCR_PR_BIT(aspect->index)) {
+		reason_hyp = "set by hypervisor";
+		reason = reason_hyp;
+		expected = true;
+	} else {
+		reason_hyp = "not modified by hypervisor";
+	}
+
+	printf("%12s (%d): %-28s (%s, %s)\n",
+	       aspect->name,
+	       aspect->index,
+	       reason,
+	       reason_hyp,
+	       reason_prctl);
+
+	/*
+	 * The checks are not atomic, so this can technically trigger if the
+	 * hypervisor makes a change while we are checking each source. It's
+	 * far more likely to be a bug if we see this though.
+	 */
+	if (actual != expected)
+		printf("                : ! actual %s does not match config\n", aspect->name);
+}
+
 int main(int argc, char *argv[])
 {
 	if (!dexcr_exists()) {
···
 	dexcr = get_dexcr(DEXCR);
 	hdexcr = get_dexcr(HDEXCR);
 	effective = dexcr | hdexcr;
+
+	printf("current status:\n");
 
 	print_dexcr("    DEXCR", dexcr);
 	print_dexcr("   HDEXCR", hdexcr);
···
 		else
 			printf("ignored\n");
 	}
+	printf("\n");
+
+	printf("configuration:\n");
+	for (size_t i = 0; i < ARRAY_SIZE(aspects); i++)
+		print_aspect_config(&aspects[i]);
+	printf("\n");
 
 	return 0;
 }

tools/testing/selftests/powerpc/dscr/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 $(OUTPUT)/dscr_default_test: LDLIBS += -lpthread
 $(OUTPUT)/dscr_explicit_test: LDLIBS += -lpthread

tools/testing/selftests/powerpc/eeh/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk

tools/testing/selftests/powerpc/flags.mk

···
+#This checks for any ENV variables and add those.
+
+ifeq ($(GIT_VERSION),)
+GIT_VERSION := $(shell git describe --always --long --dirty || echo "unknown")
+export GIT_VERSION
+endif
+
+ifeq ($(CFLAGS),)
+CFLAGS := -std=gnu99 -O2 -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(selfdir)/powerpc/include $(CFLAGS)
+export CFLAGS
+endif
+

tools/testing/selftests/powerpc/math/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 $(TEST_GEN_PROGS): ../harness.c
 $(TEST_GEN_PROGS): CFLAGS += -O2 -g -pthread -m64 -maltivec

tools/testing/selftests/powerpc/mce/Makefile

···
 TEST_GEN_PROGS := inject-ra-err
 
 include ../../lib.mk
+include ../flags.mk
 
 $(TEST_GEN_PROGS): ../harness.c

tools/testing/selftests/powerpc/mm/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c
 

tools/testing/selftests/powerpc/nx-gzip/Makefile

···
-CFLAGS = -O3 -m64 -I./include -I../include
-
 TEST_GEN_FILES := gzfht_test gunz_test
 TEST_PROGS := nx-gzip-test.sh
 
 include ../../lib.mk
+include ../flags.mk
+
+CFLAGS = -O3 -m64 -I./include -I../include
 
 $(TEST_GEN_FILES): gzip_vas.c ../utils.c

tools/testing/selftests/powerpc/papr_attributes/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c

tools/testing/selftests/powerpc/papr_sysparm/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c
 

tools/testing/selftests/powerpc/papr_vpd/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c
 

tools/testing/selftests/powerpc/pmu/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
-all: $(TEST_GEN_PROGS) ebb sampling_tests event_code_tests
+SUB_DIRS := ebb sampling_tests event_code_tests
+
+all: $(TEST_GEN_PROGS) $(SUB_DIRS)
 
 $(TEST_GEN_PROGS): $(EXTRA_SOURCES)
 
···
 
 $(OUTPUT)/per_event_excludes: ../utils.c
 
+$(SUB_DIRS):
+	BUILD_TARGET=$(OUTPUT)/$@; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -k -C $@ all
+
 DEFAULT_RUN_TESTS := $(RUN_TESTS)
 override define RUN_TESTS
 	$(DEFAULT_RUN_TESTS)
-	+TARGET=ebb; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET run_tests
-	+TARGET=sampling_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET run_tests
-	+TARGET=event_code_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET run_tests
+	+@for TARGET in $(SUB_DIRS); do \
+		BUILD_TARGET=$(OUTPUT)/$$TARGET; \
+		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET run_tests; \
+	done;
 endef
 
 emit_tests:
···
 		BASENAME_TEST=`basename $$TEST`;	\
 		echo "$(COLLECTION):$$BASENAME_TEST";	\
 	done
-	+TARGET=ebb; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET emit_tests
-	+TARGET=sampling_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET emit_tests
-	+TARGET=event_code_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET emit_tests
+	+@for TARGET in $(SUB_DIRS); do \
+		BUILD_TARGET=$(OUTPUT)/$$TARGET; \
+		$(MAKE) OUTPUT=$$BUILD_TARGET COLLECTION=$(COLLECTION)/$$TARGET -s -C $$TARGET emit_tests; \
+	done;
 
 DEFAULT_INSTALL_RULE := $(INSTALL_RULE)
 override define INSTALL_RULE
 	$(DEFAULT_INSTALL_RULE)
-	+TARGET=ebb; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET install
-	+TARGET=sampling_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET install
-	+TARGET=event_code_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET install
+	+@for TARGET in $(SUB_DIRS); do \
+		BUILD_TARGET=$(OUTPUT)/$$TARGET; \
+		$(MAKE) OUTPUT=$$BUILD_TARGET INSTALL_PATH=$$INSTALL_PATH/$$TARGET -C $$TARGET install; \
+	done;
 endef
 
 DEFAULT_CLEAN := $(CLEAN)
 override define CLEAN
 	$(DEFAULT_CLEAN)
 	$(RM) $(TEST_GEN_PROGS) $(OUTPUT)/loop.o
-	+TARGET=ebb; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET clean
-	+TARGET=sampling_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET clean
-	+TARGET=event_code_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET clean
+	+@for TARGET in $(SUB_DIRS); do \
+		BUILD_TARGET=$(OUTPUT)/$$TARGET; \
+		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET clean; \
+	done;
 endef
 
-ebb:
-	TARGET=$@; BUILD_TARGET=$$OUTPUT/$$TARGET; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -k -C $$TARGET all
-
-sampling_tests:
-	TARGET=$@; BUILD_TARGET=$$OUTPUT/$$TARGET; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -k -C $$TARGET all
-
-event_code_tests:
-	TARGET=$@; BUILD_TARGET=$$OUTPUT/$$TARGET; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -k -C $$TARGET all
 
 .PHONY: all run_tests ebb sampling_tests event_code_tests emit_tests

tools/testing/selftests/powerpc/pmu/ebb/Makefile

···
 noarg:
 	$(MAKE) -C ../../
 
-# The EBB handler is 64-bit code and everything links against it
-CFLAGS += -m64
-
-TMPOUT = $(OUTPUT)/TMPDIR/
-# Toolchains may build PIE by default which breaks the assembly
-no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \
-        $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -no-pie -x c - -o "$$TMP", -no-pie)
-
-LDFLAGS += $(no-pie-option)
-
 TEST_GEN_PROGS := reg_access_test event_attributes_test cycles_test	\
 	 cycles_with_freeze_test pmc56_overflow_test		\
 	 ebb_vs_cpu_event_test cpu_event_vs_ebb_test		\
···
 
 top_srcdir = ../../../../../..
 include ../../../lib.mk
+include ../../flags.mk
+
+# The EBB handler is 64-bit code and everything links against it
+CFLAGS += -m64
+
+TMPOUT = $(OUTPUT)/TMPDIR/
+# Toolchains may build PIE by default which breaks the assembly
+no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \
+        $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -no-pie -x c - -o "$$TMP", -no-pie)
+
+LDFLAGS += $(no-pie-option)
 
 $(TEST_GEN_PROGS): ../../harness.c ../../utils.c ../event.c ../lib.c \
 	       ebb.c ebb_handler.S trace.c busy_loop.S

tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS += -m64
-
 TEST_GEN_PROGS := group_constraint_pmc56_test group_pmc56_exclude_constraints_test group_constraint_pmc_count_test \
 	group_constraint_repeat_test group_constraint_radix_scope_qual_test reserved_bits_mmcra_sample_elig_mode_test \
 	group_constraint_mmcra_sample_test invalid_event_code_test reserved_bits_mmcra_thresh_ctl_test \
···
 
 top_srcdir = ../../../../../..
 include ../../../lib.mk
+include ../../flags.mk
+
+CFLAGS += -m64
 
 $(TEST_GEN_PROGS): ../../harness.c ../../utils.c ../event.c ../lib.c ../sampling_tests/misc.h ../sampling_tests/misc.c

tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS += -m64
-
 TEST_GEN_PROGS := mmcr0_exceptionbits_test mmcr0_cc56run_test mmcr0_pmccext_test \
 		   mmcr0_pmcjce_test mmcr0_fc56_pmc1ce_test mmcr0_fc56_pmc56_test \
 		   mmcr1_comb_test mmcr2_l2l3_test mmcr2_fcs_fch_test \
···
 
 top_srcdir = ../../../../../..
 include ../../../lib.mk
+include ../../flags.mk
+
+CFLAGS += -m64
 
 $(TEST_GEN_PROGS): ../../harness.c ../../utils.c ../event.c ../lib.c misc.c misc.h ../loop.S ../branch_loops.S

tools/testing/selftests/powerpc/primitives/Makefile

···
 # SPDX-License-Identifier: GPL-2.0-only
-CFLAGS += -I$(CURDIR)
-
 TEST_GEN_PROGS := load_unaligned_zeropad
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
+
+CFLAGS += -I$(CURDIR)
 
 $(TEST_GEN_PROGS): ../harness.c

tools/testing/selftests/powerpc/ptrace/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 TM_TESTS := $(patsubst %,$(OUTPUT)/%,$(TM_TESTS))
 TESTS_64 := $(patsubst %,$(OUTPUT)/%,$(TESTS_64))

tools/testing/selftests/powerpc/security/Makefile

···
 
 top_srcdir = ../../../../..
 
-CFLAGS += $(KHDR_INCLUDES)
-
 include ../../lib.mk
+include ../flags.mk
+
+CFLAGS += $(KHDR_INCLUDES)
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c
 

tools/testing/selftests/powerpc/signal/Makefile

···
 TEST_GEN_PROGS += sigreturn_kernel
 TEST_GEN_PROGS += sigreturn_unaligned
 
-CFLAGS += -maltivec
 $(OUTPUT)/signal_tm: CFLAGS += -mhtm
 $(OUTPUT)/sigfuz: CFLAGS += -pthread -m64
 
···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
+
+CFLAGS += -maltivec
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c signal.S

tools/testing/selftests/powerpc/stringloops/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
-# The loops are all 64-bit code
-CFLAGS += -I$(CURDIR)
-
 EXTRA_SOURCES := ../harness.c
 
 build_32bit = $(shell if ($(CC) $(CFLAGS) -m32 -o /dev/null memcmp.c >/dev/null 2>&1) then echo "1"; fi)
···
 TEST_GEN_PROGS += strlen_32
 endif
 
-ASFLAGS = $(CFLAGS)
-
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
+
+# The loops are all 64-bit code
+CFLAGS += -I$(CURDIR)
+
+ASFLAGS = $(CFLAGS)
 
 $(TEST_GEN_PROGS): $(EXTRA_SOURCES)

tools/testing/selftests/powerpc/switch_endian/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
 TEST_GEN_PROGS := switch_endian_test
 
-ASFLAGS += -O2 -Wall -g -nostdlib -m64
-
 EXTRA_CLEAN = $(OUTPUT)/*.o $(OUTPUT)/check-reversed.S
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
+
+ASFLAGS += -O2 -Wall -g -nostdlib -m64
 
 $(OUTPUT)/switch_endian_test: ASFLAGS += -I $(OUTPUT)
 $(OUTPUT)/switch_endian_test: $(OUTPUT)/check-reversed.S

tools/testing/selftests/powerpc/syscalls/Makefile

···
 # SPDX-License-Identifier: GPL-2.0-only
 TEST_GEN_PROGS := ipc_unmuxed rtas_filter
 
-CFLAGS += $(KHDR_INCLUDES)
-
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
+
+CFLAGS += $(KHDR_INCLUDES)
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c

tools/testing/selftests/powerpc/tm/Makefile

···
 
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c
 

tools/testing/selftests/powerpc/vphn/Makefile

···
 # SPDX-License-Identifier: GPL-2.0-only
 TEST_GEN_PROGS := test-vphn
 
-CFLAGS += -m64 -I$(CURDIR)
-
 top_srcdir = ../../../../..
 include ../../lib.mk
+include ../flags.mk
+
+CFLAGS += -m64 -I$(CURDIR)
 
 $(TEST_GEN_PROGS): ../harness.c