Merge tag 's390-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Vasily Gorbik:

- Fix machine check handler _CIF_MCCK_GUEST bit setting by adding the
missing base register for relocated lowcore address

- Fix build failure on older linkers by conditionally adding the
-no-pie linker option only when it is supported

- Fix inaccurate kernel messages in vfio-ap by providing descriptive
error notifications for AP queue sharing violations

- Fix PCI isolation logic by ensuring non-VF devices correctly return
false in zpci_bus_is_isolated_vf()

- Fix PCI DMA range map setup by using dma_direct_set_offset() to add a
proper sentinel element, preventing potential overruns and
translation errors

- Cleanup header dependency problems with asm-offsets.c

- Add fault info for unexpected low-address protection faults in user
mode

- Add support for HOTPLUG_SMT, replacing the arch-specific "nosmt"
handling with common code handling

- Use bitop functions to implement CPU flag helper functions to ensure
that bits cannot get lost if modified in different contexts on a CPU

- Remove unused machine_flags for the lowcore

* tag 's390-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/vfio-ap: Fix no AP queue sharing allowed message written to kernel log
s390/pci: Fix dev.dma_range_map missing sentinel element
s390/mm: Dump fault info in case of low address protection fault
s390/smp: Add support for HOTPLUG_SMT
s390: Fix linker error when -no-pie option is unavailable
s390/processor: Use bitop functions for cpu flag helper functions
s390/asm-offsets: Remove ASM_OFFSETS_C
s390/asm-offsets: Include ftrace_regs.h instead of ftrace.h
s390/kvm: Split kvm_host header file
s390/pci: Fix zpci_bus_is_isolated_vf() for non-VFs
s390/lowcore: Remove unused machine_flags
s390/entry: Fix setting _CIF_MCCK_GUEST with lowcore relocation

Documentation/admin-guide/kernel-parameters.txt

···
 	nosmp		[SMP,EARLY] Tells an SMP kernel to act as a UP kernel,
 			and disable the IO APIC.  legacy for "maxcpus=0".
 
-	nosmt		[KNL,MIPS,PPC,S390,EARLY] Disable symmetric multithreading (SMT).
+	nosmt		[KNL,MIPS,PPC,EARLY] Disable symmetric multithreading (SMT).
 			Equivalent to smt=1.
 
-			[KNL,X86,PPC] Disable symmetric multithreading (SMT).
+			[KNL,X86,PPC,S390] Disable symmetric multithreading (SMT).
 			nosmt=force: Force disable SMT, cannot be undone
 				     via the sysfs control file.
 

arch/s390/Kconfig

···
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HAVE_VIRT_CPU_ACCOUNTING
 	select HAVE_VIRT_CPU_ACCOUNTING_IDLE
+	select HOTPLUG_SMT
 	select IOMMU_HELPER		if PCI
 	select IOMMU_SUPPORT		if PCI
 	select KASAN_VMALLOC if KASAN

arch/s390/Makefile

···
 KBUILD_AFLAGS	+= -m64
 KBUILD_CFLAGS	+= -m64
 KBUILD_CFLAGS	+= -fPIC
-LDFLAGS_vmlinux	:= -no-pie --emit-relocs --discard-none
+LDFLAGS_vmlinux	:= $(call ld-option,-no-pie) --emit-relocs --discard-none
 extra_tools	:= relocs
 aflags_dwarf	:= -Wa,-gdwarf-2
 KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__

arch/s390/include/asm/kvm_host.h

···
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/mmu_notifier.h>
+#include <asm/kvm_host_types.h>
 #include <asm/debug.h>
 #include <asm/cpu.h>
 #include <asm/fpu.h>
 #include <asm/isc.h>
 #include <asm/guarded_storage.h>
 
-#define KVM_S390_BSCA_CPU_SLOTS 64
-#define KVM_S390_ESCA_CPU_SLOTS 248
 #define KVM_MAX_VCPUS 255
 
 #define KVM_INTERNAL_MEM_SLOTS 1
···
 #define KVM_REQ_VSIE_RESTART	KVM_ARCH_REQ(5)
 #define KVM_REQ_REFRESH_GUEST_PREFIX	\
 	KVM_ARCH_REQ_FLAGS(6, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
-
-#define SIGP_CTRL_C		0x80
-#define SIGP_CTRL_SCN_MASK	0x3f
-
-union bsca_sigp_ctrl {
-	__u8 value;
-	struct {
-		__u8 c : 1;
-		__u8 r : 1;
-		__u8 scn : 6;
-	};
-};
-
-union esca_sigp_ctrl {
-	__u16 value;
-	struct {
-		__u8 c : 1;
-		__u8 reserved: 7;
-		__u8 scn;
-	};
-};
-
-struct esca_entry {
-	union esca_sigp_ctrl sigp_ctrl;
-	__u16   reserved1[3];
-	__u64   sda;
-	__u64   reserved2[6];
-};
-
-struct bsca_entry {
-	__u8	reserved0;
-	union bsca_sigp_ctrl	sigp_ctrl;
-	__u16	reserved[3];
-	__u64	sda;
-	__u64	reserved2[2];
-};
-
-union ipte_control {
-	unsigned long val;
-	struct {
-		unsigned long k  : 1;
-		unsigned long kh : 31;
-		unsigned long kg : 32;
-	};
-};
-
-/*
- * Utility is defined as two bytes but having it four bytes wide
- * generates more efficient code. Since the following bytes are
- * reserved this makes no functional difference.
- */
-union sca_utility {
-	__u32 val;
-	struct {
-		__u32 mtcr : 1;
-		__u32	   : 31;
-	};
-};
-
-struct bsca_block {
-	union ipte_control ipte_control;
-	__u64	reserved[5];
-	__u64	mcn;
-	union sca_utility utility;
-	__u8	reserved2[4];
-	struct bsca_entry cpu[KVM_S390_BSCA_CPU_SLOTS];
-};
-
-struct esca_block {
-	union ipte_control ipte_control;
-	__u64   reserved1[6];
-	union sca_utility utility;
-	__u8	reserved2[4];
-	__u64   mcn[4];
-	__u64   reserved3[20];
-	struct esca_entry cpu[KVM_S390_ESCA_CPU_SLOTS];
-};
-
-/*
- * This struct is used to store some machine check info from lowcore
- * for machine checks that happen while the guest is running.
- * This info in host's lowcore might be overwritten by a second machine
- * check from host when host is in the machine check's high-level handling.
- * The size is 24 bytes.
- */
-struct mcck_volatile_info {
-	__u64 mcic;
-	__u64 failing_storage_address;
-	__u32 ext_damage_code;
-	__u32 reserved;
-};
-
-#define CR0_INITIAL_MASK (CR0_UNUSED_56 | CR0_INTERRUPT_KEY_SUBMASK | \
-			  CR0_MEASUREMENT_ALERT_SUBMASK)
-#define CR14_INITIAL_MASK (CR14_UNUSED_32 | CR14_UNUSED_33 | \
-			   CR14_EXTERNAL_DAMAGE_SUBMASK)
-
-#define SIDAD_SIZE_MASK		0xff
-#define sida_addr(sie_block) phys_to_virt((sie_block)->sidad & PAGE_MASK)
-#define sida_size(sie_block) \
-	((((sie_block)->sidad & SIDAD_SIZE_MASK) + 1) * PAGE_SIZE)
-
-#define CPUSTAT_STOPPED    0x80000000
-#define CPUSTAT_WAIT       0x10000000
-#define CPUSTAT_ECALL_PEND 0x08000000
-#define CPUSTAT_STOP_INT   0x04000000
-#define CPUSTAT_IO_INT     0x02000000
-#define CPUSTAT_EXT_INT    0x01000000
-#define CPUSTAT_RUNNING    0x00800000
-#define CPUSTAT_RETAINED   0x00400000
-#define CPUSTAT_TIMING_SUB 0x00020000
-#define CPUSTAT_SIE_SUB    0x00010000
-#define CPUSTAT_RRF        0x00008000
-#define CPUSTAT_SLSV       0x00004000
-#define CPUSTAT_SLSR       0x00002000
-#define CPUSTAT_ZARCH      0x00000800
-#define CPUSTAT_MCDS       0x00000100
-#define CPUSTAT_KSS        0x00000200
-#define CPUSTAT_SM         0x00000080
-#define CPUSTAT_IBS        0x00000040
-#define CPUSTAT_GED2       0x00000010
-#define CPUSTAT_G          0x00000008
-#define CPUSTAT_GED        0x00000004
-#define CPUSTAT_J          0x00000002
-#define CPUSTAT_P          0x00000001
-
-struct kvm_s390_sie_block {
-	atomic_t cpuflags;		/* 0x0000 */
-	__u32 : 1;			/* 0x0004 */
-	__u32 prefix : 18;
-	__u32 : 1;
-	__u32 ibc : 12;
-	__u8	reserved08[4];		/* 0x0008 */
-#define PROG_IN_SIE (1<<0)
-	__u32	prog0c;			/* 0x000c */
-	union {
-		__u8	reserved10[16];		/* 0x0010 */
-		struct {
-			__u64	pv_handle_cpu;
-			__u64	pv_handle_config;
-		};
-	};
-#define PROG_BLOCK_SIE	(1<<0)
-#define PROG_REQUEST	(1<<1)
-	atomic_t prog20;		/* 0x0020 */
-	__u8	reserved24[4];		/* 0x0024 */
-	__u64	cputm;			/* 0x0028 */
-	__u64	ckc;			/* 0x0030 */
-	__u64	epoch;			/* 0x0038 */
-	__u32	svcc;			/* 0x0040 */
-#define LCTL_CR0	0x8000
-#define LCTL_CR6	0x0200
-#define LCTL_CR9	0x0040
-#define LCTL_CR10	0x0020
-#define LCTL_CR11	0x0010
-#define LCTL_CR14	0x0002
-	__u16   lctl;			/* 0x0044 */
-	__s16	icpua;			/* 0x0046 */
-#define ICTL_OPEREXC	0x80000000
-#define ICTL_PINT	0x20000000
-#define ICTL_LPSW	0x00400000
-#define ICTL_STCTL	0x00040000
-#define ICTL_ISKE	0x00004000
-#define ICTL_SSKE	0x00002000
-#define ICTL_RRBE	0x00001000
-#define ICTL_TPROT	0x00000200
-	__u32	ictl;			/* 0x0048 */
-#define ECA_CEI		0x80000000
-#define ECA_IB		0x40000000
-#define ECA_SIGPI	0x10000000
-#define ECA_MVPGI	0x01000000
-#define ECA_AIV		0x00200000
-#define ECA_VX		0x00020000
-#define ECA_PROTEXCI	0x00002000
-#define ECA_APIE	0x00000008
-#define ECA_SII		0x00000001
-	__u32	eca;			/* 0x004c */
-#define ICPT_INST	0x04
-#define ICPT_PROGI	0x08
-#define ICPT_INSTPROGI	0x0C
-#define ICPT_EXTREQ	0x10
-#define ICPT_EXTINT	0x14
-#define ICPT_IOREQ	0x18
-#define ICPT_WAIT	0x1c
-#define ICPT_VALIDITY	0x20
-#define ICPT_STOP	0x28
-#define ICPT_OPEREXC	0x2C
-#define ICPT_PARTEXEC	0x38
-#define ICPT_IOINST	0x40
-#define ICPT_KSS	0x5c
-#define ICPT_MCHKREQ	0x60
-#define ICPT_INT_ENABLE	0x64
-#define ICPT_PV_INSTR	0x68
-#define ICPT_PV_NOTIFY	0x6c
-#define ICPT_PV_PREF	0x70
-	__u8	icptcode;		/* 0x0050 */
-	__u8	icptstatus;		/* 0x0051 */
-	__u16	ihcpu;			/* 0x0052 */
-	__u8	reserved54;		/* 0x0054 */
-#define IICTL_CODE_NONE		 0x00
-#define IICTL_CODE_MCHK		 0x01
-#define IICTL_CODE_EXT		 0x02
-#define IICTL_CODE_IO		 0x03
-#define IICTL_CODE_RESTART	 0x04
-#define IICTL_CODE_SPECIFICATION 0x10
-#define IICTL_CODE_OPERAND	 0x11
-	__u8	iictl;			/* 0x0055 */
-	__u16	ipa;			/* 0x0056 */
-	__u32	ipb;			/* 0x0058 */
-	__u32	scaoh;			/* 0x005c */
-#define FPF_BPBC 	0x20
-	__u8	fpf;			/* 0x0060 */
-#define ECB_GS		0x40
-#define ECB_TE		0x10
-#define ECB_SPECI	0x08
-#define ECB_SRSI	0x04
-#define ECB_HOSTPROTINT	0x02
-#define ECB_PTF		0x01
-	__u8	ecb;			/* 0x0061 */
-#define ECB2_CMMA	0x80
-#define ECB2_IEP	0x20
-#define ECB2_PFMFI	0x08
-#define ECB2_ESCA	0x04
-#define ECB2_ZPCI_LSI	0x02
-	__u8    ecb2;                   /* 0x0062 */
-#define ECB3_AISI	0x20
-#define ECB3_AISII	0x10
-#define ECB3_DEA 0x08
-#define ECB3_AES 0x04
-#define ECB3_RI  0x01
-	__u8    ecb3;			/* 0x0063 */
-#define ESCA_SCAOL_MASK ~0x3fU
-	__u32	scaol;			/* 0x0064 */
-	__u8	sdf;			/* 0x0068 */
-	__u8    epdx;			/* 0x0069 */
-	__u8	cpnc;			/* 0x006a */
-	__u8	reserved6b;		/* 0x006b */
-	__u32	todpr;			/* 0x006c */
-#define GISA_FORMAT1 0x00000001
-	__u32	gd;			/* 0x0070 */
-	__u8	reserved74[12];		/* 0x0074 */
-	__u64	mso;			/* 0x0080 */
-	__u64	msl;			/* 0x0088 */
-	psw_t	gpsw;			/* 0x0090 */
-	__u64	gg14;			/* 0x00a0 */
-	__u64	gg15;			/* 0x00a8 */
-	__u8	reservedb0[8];		/* 0x00b0 */
-#define HPID_KVM	0x4
-#define HPID_VSIE	0x5
-	__u8	hpid;			/* 0x00b8 */
-	__u8	reservedb9[7];		/* 0x00b9 */
-	union {
-		struct {
-			__u32	eiparams;	/* 0x00c0 */
-			__u16	extcpuaddr;	/* 0x00c4 */
-			__u16	eic;		/* 0x00c6 */
-		};
-		__u64	mcic;			/* 0x00c0 */
-	} __packed;
-	__u32	reservedc8;		/* 0x00c8 */
-	union {
-		struct {
-			__u16	pgmilc;		/* 0x00cc */
-			__u16	iprcc;		/* 0x00ce */
-		};
-		__u32	edc;			/* 0x00cc */
-	} __packed;
-	union {
-		struct {
-			__u32	dxc;		/* 0x00d0 */
-			__u16	mcn;		/* 0x00d4 */
-			__u8	perc;		/* 0x00d6 */
-			__u8	peratmid;	/* 0x00d7 */
-		};
-		__u64	faddr;			/* 0x00d0 */
-	} __packed;
-	__u64	peraddr;		/* 0x00d8 */
-	__u8	eai;			/* 0x00e0 */
-	__u8	peraid;			/* 0x00e1 */
-	__u8	oai;			/* 0x00e2 */
-	__u8	armid;			/* 0x00e3 */
-	__u8	reservede4[4];		/* 0x00e4 */
-	union {
-		__u64	tecmc;		/* 0x00e8 */
-		struct {
-			__u16	subchannel_id;	/* 0x00e8 */
-			__u16	subchannel_nr;	/* 0x00ea */
-			__u32	io_int_parm;	/* 0x00ec */
-			__u32	io_int_word;	/* 0x00f0 */
-		};
-	} __packed;
-	__u8	reservedf4[8];		/* 0x00f4 */
-#define CRYCB_FORMAT_MASK 0x00000003
-#define CRYCB_FORMAT0 0x00000000
-#define CRYCB_FORMAT1 0x00000001
-#define CRYCB_FORMAT2 0x00000003
-	__u32	crycbd;			/* 0x00fc */
-	__u64	gcr[16];		/* 0x0100 */
-	union {
-		__u64	gbea;		/* 0x0180 */
-		__u64	sidad;
-	};
-	__u8    reserved188[8];		/* 0x0188 */
-	__u64   sdnxo;			/* 0x0190 */
-	__u8    reserved198[8];		/* 0x0198 */
-	__u32	fac;			/* 0x01a0 */
-	__u8	reserved1a4[20];	/* 0x01a4 */
-	__u64	cbrlo;			/* 0x01b8 */
-	__u8	reserved1c0[8];		/* 0x01c0 */
-#define ECD_HOSTREGMGMT	0x20000000
-#define ECD_MEF		0x08000000
-#define ECD_ETOKENF	0x02000000
-#define ECD_ECC		0x00200000
-#define ECD_HMAC	0x00004000
-	__u32	ecd;			/* 0x01c8 */
-	__u8	reserved1cc[18];	/* 0x01cc */
-	__u64	pp;			/* 0x01de */
-	__u8	reserved1e6[2];		/* 0x01e6 */
-	__u64	itdba;			/* 0x01e8 */
-	__u64   riccbd;			/* 0x01f0 */
-	__u64	gvrd;			/* 0x01f8 */
-} __packed __aligned(512);
-
-struct kvm_s390_itdb {
-	__u8	data[256];
-};
-
-struct sie_page {
-	struct kvm_s390_sie_block sie_block;
-	struct mcck_volatile_info mcck_info;	/* 0x0200 */
-	__u8 reserved218[360];		/* 0x0218 */
-	__u64 pv_grregs[16];		/* 0x0380 */
-	__u8 reserved400[512];		/* 0x0400 */
-	struct kvm_s390_itdb itdb;	/* 0x0600 */
-	__u8 reserved700[2304];		/* 0x0700 */
-};
 
 struct kvm_vcpu_stat {
 	struct kvm_vcpu_stat_generic generic;

arch/s390/include/asm/kvm_host_types.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _ASM_KVM_HOST_TYPES_H
+#define _ASM_KVM_HOST_TYPES_H
+
+#include <linux/atomic.h>
+#include <linux/types.h>
+
+#define KVM_S390_BSCA_CPU_SLOTS 64
+#define KVM_S390_ESCA_CPU_SLOTS 248
+
+#define SIGP_CTRL_C		0x80
+#define SIGP_CTRL_SCN_MASK	0x3f
+
+union bsca_sigp_ctrl {
+	__u8 value;
+	struct {
+		__u8 c : 1;
+		__u8 r : 1;
+		__u8 scn : 6;
+	};
+};
+
+union esca_sigp_ctrl {
+	__u16 value;
+	struct {
+		__u8 c : 1;
+		__u8 reserved: 7;
+		__u8 scn;
+	};
+};
+
+struct esca_entry {
+	union esca_sigp_ctrl sigp_ctrl;
+	__u16	reserved1[3];
+	__u64	sda;
+	__u64	reserved2[6];
+};
+
+struct bsca_entry {
+	__u8	reserved0;
+	union bsca_sigp_ctrl	sigp_ctrl;
+	__u16	reserved[3];
+	__u64	sda;
+	__u64	reserved2[2];
+};
+
+union ipte_control {
+	unsigned long val;
+	struct {
+		unsigned long k  : 1;
+		unsigned long kh : 31;
+		unsigned long kg : 32;
+	};
+};
+
+/*
+ * Utility is defined as two bytes but having it four bytes wide
+ * generates more efficient code. Since the following bytes are
+ * reserved this makes no functional difference.
+ */
+union sca_utility {
+	__u32 val;
+	struct {
+		__u32 mtcr : 1;
+		__u32	   : 31;
+	};
+};
+
+struct bsca_block {
+	union ipte_control ipte_control;
+	__u64	reserved[5];
+	__u64	mcn;
+	union sca_utility utility;
+	__u8	reserved2[4];
+	struct bsca_entry cpu[KVM_S390_BSCA_CPU_SLOTS];
+};
+
+struct esca_block {
+	union ipte_control ipte_control;
+	__u64	reserved1[6];
+	union sca_utility utility;
+	__u8	reserved2[4];
+	__u64	mcn[4];
+	__u64	reserved3[20];
+	struct esca_entry cpu[KVM_S390_ESCA_CPU_SLOTS];
+};
+
+/*
+ * This struct is used to store some machine check info from lowcore
+ * for machine checks that happen while the guest is running.
+ * This info in host's lowcore might be overwritten by a second machine
+ * check from host when host is in the machine check's high-level handling.
+ * The size is 24 bytes.
+ */
+struct mcck_volatile_info {
+	__u64 mcic;
+	__u64 failing_storage_address;
+	__u32 ext_damage_code;
+	__u32 reserved;
+};
+
+#define CR0_INITIAL_MASK (CR0_UNUSED_56 | CR0_INTERRUPT_KEY_SUBMASK | \
+			  CR0_MEASUREMENT_ALERT_SUBMASK)
+#define CR14_INITIAL_MASK (CR14_UNUSED_32 | CR14_UNUSED_33 | \
+			   CR14_EXTERNAL_DAMAGE_SUBMASK)
+
+#define SIDAD_SIZE_MASK		0xff
+#define sida_addr(sie_block) phys_to_virt((sie_block)->sidad & PAGE_MASK)
+#define sida_size(sie_block) \
+	((((sie_block)->sidad & SIDAD_SIZE_MASK) + 1) * PAGE_SIZE)
+
+#define CPUSTAT_STOPPED    0x80000000
+#define CPUSTAT_WAIT	   0x10000000
+#define CPUSTAT_ECALL_PEND 0x08000000
+#define CPUSTAT_STOP_INT   0x04000000
+#define CPUSTAT_IO_INT	   0x02000000
+#define CPUSTAT_EXT_INT    0x01000000
+#define CPUSTAT_RUNNING    0x00800000
+#define CPUSTAT_RETAINED   0x00400000
+#define CPUSTAT_TIMING_SUB 0x00020000
+#define CPUSTAT_SIE_SUB    0x00010000
+#define CPUSTAT_RRF	   0x00008000
+#define CPUSTAT_SLSV	   0x00004000
+#define CPUSTAT_SLSR	   0x00002000
+#define CPUSTAT_ZARCH	   0x00000800
+#define CPUSTAT_MCDS	   0x00000100
+#define CPUSTAT_KSS	   0x00000200
+#define CPUSTAT_SM	   0x00000080
+#define CPUSTAT_IBS	   0x00000040
+#define CPUSTAT_GED2	   0x00000010
+#define CPUSTAT_G	   0x00000008
+#define CPUSTAT_GED	   0x00000004
+#define CPUSTAT_J	   0x00000002
+#define CPUSTAT_P	   0x00000001
+
+struct kvm_s390_sie_block {
+	atomic_t cpuflags;		/* 0x0000 */
+	__u32 : 1;			/* 0x0004 */
+	__u32 prefix : 18;
+	__u32 : 1;
+	__u32 ibc : 12;
+	__u8	reserved08[4];		/* 0x0008 */
+#define PROG_IN_SIE (1<<0)
+	__u32	prog0c;			/* 0x000c */
+	union {
+		__u8	reserved10[16];		/* 0x0010 */
+		struct {
+			__u64	pv_handle_cpu;
+			__u64	pv_handle_config;
+		};
+	};
+#define PROG_BLOCK_SIE	(1<<0)
+#define PROG_REQUEST	(1<<1)
+	atomic_t prog20;		/* 0x0020 */
+	__u8	reserved24[4];		/* 0x0024 */
+	__u64	cputm;			/* 0x0028 */
+	__u64	ckc;			/* 0x0030 */
+	__u64	epoch;			/* 0x0038 */
+	__u32	svcc;			/* 0x0040 */
+#define LCTL_CR0	0x8000
+#define LCTL_CR6	0x0200
+#define LCTL_CR9	0x0040
+#define LCTL_CR10	0x0020
+#define LCTL_CR11	0x0010
+#define LCTL_CR14	0x0002
+	__u16	lctl;			/* 0x0044 */
+	__s16	icpua;			/* 0x0046 */
+#define ICTL_OPEREXC	0x80000000
+#define ICTL_PINT	0x20000000
+#define ICTL_LPSW	0x00400000
+#define ICTL_STCTL	0x00040000
+#define ICTL_ISKE	0x00004000
+#define ICTL_SSKE	0x00002000
+#define ICTL_RRBE	0x00001000
+#define ICTL_TPROT	0x00000200
+	__u32	ictl;			/* 0x0048 */
+#define ECA_CEI		0x80000000
+#define ECA_IB		0x40000000
+#define ECA_SIGPI	0x10000000
+#define ECA_MVPGI	0x01000000
+#define ECA_AIV		0x00200000
+#define ECA_VX		0x00020000
+#define ECA_PROTEXCI	0x00002000
+#define ECA_APIE	0x00000008
+#define ECA_SII		0x00000001
+	__u32	eca;			/* 0x004c */
+#define ICPT_INST	0x04
+#define ICPT_PROGI	0x08
+#define ICPT_INSTPROGI	0x0C
+#define ICPT_EXTREQ	0x10
+#define ICPT_EXTINT	0x14
+#define ICPT_IOREQ	0x18
+#define ICPT_WAIT	0x1c
+#define ICPT_VALIDITY	0x20
+#define ICPT_STOP	0x28
+#define ICPT_OPEREXC	0x2C
+#define ICPT_PARTEXEC	0x38
+#define ICPT_IOINST	0x40
+#define ICPT_KSS	0x5c
+#define ICPT_MCHKREQ	0x60
+#define ICPT_INT_ENABLE	0x64
+#define ICPT_PV_INSTR	0x68
+#define ICPT_PV_NOTIFY	0x6c
+#define ICPT_PV_PREF	0x70
+	__u8	icptcode;		/* 0x0050 */
+	__u8	icptstatus;		/* 0x0051 */
+	__u16	ihcpu;			/* 0x0052 */
+	__u8	reserved54;		/* 0x0054 */
+#define IICTL_CODE_NONE		 0x00
+#define IICTL_CODE_MCHK		 0x01
+#define IICTL_CODE_EXT		 0x02
+#define IICTL_CODE_IO		 0x03
+#define IICTL_CODE_RESTART	 0x04
+#define IICTL_CODE_SPECIFICATION 0x10
+#define IICTL_CODE_OPERAND	 0x11
+	__u8	iictl;			/* 0x0055 */
+	__u16	ipa;			/* 0x0056 */
+	__u32	ipb;			/* 0x0058 */
+	__u32	scaoh;			/* 0x005c */
+#define FPF_BPBC	0x20
+	__u8	fpf;			/* 0x0060 */
+#define ECB_GS		0x40
+#define ECB_TE		0x10
+#define ECB_SPECI	0x08
+#define ECB_SRSI	0x04
+#define ECB_HOSTPROTINT	0x02
+#define ECB_PTF		0x01
+	__u8	ecb;			/* 0x0061 */
+#define ECB2_CMMA	0x80
+#define ECB2_IEP	0x20
+#define ECB2_PFMFI	0x08
+#define ECB2_ESCA	0x04
+#define ECB2_ZPCI_LSI	0x02
+	__u8	ecb2;			/* 0x0062 */
+#define ECB3_AISI	0x20
+#define ECB3_AISII	0x10
+#define ECB3_DEA 0x08
+#define ECB3_AES 0x04
+#define ECB3_RI  0x01
+	__u8	ecb3;			/* 0x0063 */
+#define ESCA_SCAOL_MASK ~0x3fU
+	__u32	scaol;			/* 0x0064 */
+	__u8	sdf;			/* 0x0068 */
+	__u8	epdx;			/* 0x0069 */
+	__u8	cpnc;			/* 0x006a */
+	__u8	reserved6b;		/* 0x006b */
+	__u32	todpr;			/* 0x006c */
+#define GISA_FORMAT1 0x00000001
+	__u32	gd;			/* 0x0070 */
+	__u8	reserved74[12];		/* 0x0074 */
+	__u64	mso;			/* 0x0080 */
+	__u64	msl;			/* 0x0088 */
+	psw_t	gpsw;			/* 0x0090 */
+	__u64	gg14;			/* 0x00a0 */
+	__u64	gg15;			/* 0x00a8 */
+	__u8	reservedb0[8];		/* 0x00b0 */
+#define HPID_KVM	0x4
+#define HPID_VSIE	0x5
+	__u8	hpid;			/* 0x00b8 */
+	__u8	reservedb9[7];		/* 0x00b9 */
+	union {
+		struct {
+			__u32	eiparams;	/* 0x00c0 */
+			__u16	extcpuaddr;	/* 0x00c4 */
+			__u16	eic;		/* 0x00c6 */
+		};
+		__u64	mcic;			/* 0x00c0 */
+	} __packed;
+	__u32	reservedc8;		/* 0x00c8 */
+	union {
+		struct {
+			__u16	pgmilc;		/* 0x00cc */
+			__u16	iprcc;		/* 0x00ce */
+		};
+		__u32	edc;			/* 0x00cc */
+	} __packed;
+	union {
+		struct {
+			__u32	dxc;		/* 0x00d0 */
+			__u16	mcn;		/* 0x00d4 */
+			__u8	perc;		/* 0x00d6 */
+			__u8	peratmid;	/* 0x00d7 */
+		};
+		__u64	faddr;			/* 0x00d0 */
+	} __packed;
+	__u64	peraddr;		/* 0x00d8 */
+	__u8	eai;			/* 0x00e0 */
+	__u8	peraid;			/* 0x00e1 */
+	__u8	oai;			/* 0x00e2 */
+	__u8	armid;			/* 0x00e3 */
+	__u8	reservede4[4];		/* 0x00e4 */
+	union {
+		__u64	tecmc;		/* 0x00e8 */
+		struct {
+			__u16	subchannel_id;	/* 0x00e8 */
+			__u16	subchannel_nr;	/* 0x00ea */
+			__u32	io_int_parm;	/* 0x00ec */
+			__u32	io_int_word;	/* 0x00f0 */
+		};
+	} __packed;
+	__u8	reservedf4[8];		/* 0x00f4 */
+#define CRYCB_FORMAT_MASK 0x00000003
+#define CRYCB_FORMAT0 0x00000000
+#define CRYCB_FORMAT1 0x00000001
+#define CRYCB_FORMAT2 0x00000003
+	__u32	crycbd;			/* 0x00fc */
+	__u64	gcr[16];		/* 0x0100 */
+	union {
+		__u64	gbea;		/* 0x0180 */
+		__u64	sidad;
+	};
+	__u8	reserved188[8];		/* 0x0188 */
+	__u64	sdnxo;			/* 0x0190 */
+	__u8	reserved198[8];		/* 0x0198 */
+	__u32	fac;			/* 0x01a0 */
+	__u8	reserved1a4[20];	/* 0x01a4 */
+	__u64	cbrlo;			/* 0x01b8 */
+	__u8	reserved1c0[8];		/* 0x01c0 */
+#define ECD_HOSTREGMGMT	0x20000000
+#define ECD_MEF		0x08000000
+#define ECD_ETOKENF	0x02000000
+#define ECD_ECC		0x00200000
+#define ECD_HMAC	0x00004000
+	__u32	ecd;			/* 0x01c8 */
+	__u8	reserved1cc[18];	/* 0x01cc */
+	__u64	pp;			/* 0x01de */
+	__u8	reserved1e6[2];		/* 0x01e6 */
+	__u64	itdba;			/* 0x01e8 */
+	__u64	riccbd;			/* 0x01f0 */
+	__u64	gvrd;			/* 0x01f8 */
+} __packed __aligned(512);
+
+struct kvm_s390_itdb {
+	__u8	data[256];
+};
+
+struct sie_page {
+	struct kvm_s390_sie_block sie_block;
+	struct mcck_volatile_info mcck_info;	/* 0x0200 */
+	__u8 reserved218[360];		/* 0x0218 */
+	__u64 pv_grregs[16];		/* 0x0380 */
+	__u8 reserved400[512];		/* 0x0400 */
+	struct kvm_s390_itdb itdb;	/* 0x0600 */
+	__u8 reserved700[2304];		/* 0x0700 */
+};
+
+#endif /* _ASM_KVM_HOST_TYPES_H */

arch/s390/include/asm/lowcore.h

···
 	__u32	spinlock_index;			/* 0x03b0 */
 	__u8	pad_0x03b4[0x03b8-0x03b4];	/* 0x03b4 */
 	__u64	percpu_offset;			/* 0x03b8 */
-	__u8	pad_0x03c0[0x03c8-0x03c0];	/* 0x03c0 */
-	__u64	machine_flags;			/* 0x03c8 */
-	__u8	pad_0x03d0[0x0400-0x03d0];	/* 0x03d0 */
+	__u8	pad_0x03c0[0x0400-0x03c0];	/* 0x03c0 */
 
 	__u32	return_lpswe;			/* 0x0400 */
 	__u32	return_mcck_lpswe;		/* 0x0404 */

arch/s390/include/asm/processor.h

···
 #include <linux/cpumask.h>
 #include <linux/linkage.h>
 #include <linux/irqflags.h>
+#include <linux/bitops.h>
 #include <asm/fpu-types.h>
 #include <asm/cpu.h>
 #include <asm/page.h>
···
 
 static __always_inline void set_cpu_flag(int flag)
 {
-	this_pcpu()->flags |= (1UL << flag);
+	set_bit(flag, &this_pcpu()->flags);
 }
 
 static __always_inline void clear_cpu_flag(int flag)
 {
-	this_pcpu()->flags &= ~(1UL << flag);
+	clear_bit(flag, &this_pcpu()->flags);
 }
 
 static __always_inline bool test_cpu_flag(int flag)
 {
-	return this_pcpu()->flags & (1UL << flag);
+	return test_bit(flag, &this_pcpu()->flags);
 }
 
 static __always_inline bool test_and_set_cpu_flag(int flag)
 {
-	if (test_cpu_flag(flag))
-		return true;
-	set_cpu_flag(flag);
-	return false;
+	return test_and_set_bit(flag, &this_pcpu()->flags);
 }
 
 static __always_inline bool test_and_clear_cpu_flag(int flag)
 {
-	if (!test_cpu_flag(flag))
-		return false;
-	clear_cpu_flag(flag);
-	return true;
+	return test_and_clear_bit(flag, &this_pcpu()->flags);
 }
 
 /*
···
  */
 static __always_inline bool test_cpu_flag_of(int flag, int cpu)
 {
-	return per_cpu(pcpu_devices, cpu).flags & (1UL << flag);
+	return test_bit(flag, &per_cpu(pcpu_devices, cpu).flags);
 }
 
 #define arch_needs_cpu() test_cpu_flag(CIF_NOHZ_DELAY)

arch/s390/include/asm/thread_info.h

···
 #define _ASM_THREAD_INFO_H
 
 #include <linux/bits.h>
-#ifndef ASM_OFFSETS_C
-#include <asm/asm-offsets.h>
-#endif
 
 /*
  * General size of kernel stacks

arch/s390/include/asm/topology.h

···
 
 #endif /* CONFIG_SCHED_TOPOLOGY */
 
+static inline bool topology_is_primary_thread(unsigned int cpu)
+{
+	return smp_get_base_cpu(cpu) == cpu;
+}
+#define topology_is_primary_thread topology_is_primary_thread
+
 #define POLARIZATION_UNKNOWN	(-1)
 #define POLARIZATION_HRZ	(0)
 #define POLARIZATION_VL		(1)

arch/s390/kernel/asm-offsets.c

···
  * and format the required data.
  */
 
-#define ASM_OFFSETS_C
-
 #include <linux/kbuild.h>
-#include <linux/kvm_host.h>
 #include <linux/sched.h>
 #include <linux/purgatory.h>
 #include <linux/pgtable.h>
-#include <linux/ftrace.h>
+#include <linux/ftrace_regs.h>
+#include <asm/kvm_host_types.h>
 #include <asm/stacktrace.h>
+#include <asm/ptrace.h>
 
 int main(void)
 {

arch/s390/kernel/dumpstack.c

···
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
 #include <linux/sched/task_stack.h>
+#include <asm/asm-offsets.h>
 #include <asm/processor.h>
 #include <asm/debug.h>
 #include <asm/dis.h>

arch/s390/kernel/early.c

···
 #include <asm/asm-extable.h>
 #include <linux/memblock.h>
 #include <asm/access-regs.h>
+#include <asm/asm-offsets.h>
 #include <asm/machine.h>
 #include <asm/diag.h>
 #include <asm/ebcdic.h>

arch/s390/kernel/entry.S

···
 	clgrjl	%r9,%r14, 4f
 	larl	%r14,.Lsie_leave
 	clgrjhe	%r9,%r14, 4f
-	lg	%r10,__LC_PCPU
+	lg	%r10,__LC_PCPU(%r13)
 	oi	__PCPU_FLAGS+7(%r10), _CIF_MCCK_GUEST
 4:	BPENTER	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 	SIEEXIT __SF_SIE_CONTROL(%r15),%r13

arch/s390/kernel/setup.c

···
 	lc->clock_comparator = clock_comparator_max;
 	lc->current_task = (unsigned long)&init_task;
 	lc->lpp = LPP_MAGIC;
-	lc->machine_flags = get_lowcore()->machine_flags;
 	lc->preempt_count = get_lowcore()->preempt_count;
 	nmi_alloc_mcesa_early(&lc->mcesad);
 	lc->sys_enter_timer = get_lowcore()->sys_enter_timer;

arch/s390/kernel/smp.c

···
 static unsigned int smp_max_threads __initdata = -1U;
 cpumask_t cpu_setup_mask;
 
-static int __init early_nosmt(char *s)
-{
-	smp_max_threads = 1;
-	return 0;
-}
-early_param("nosmt", early_nosmt);
-
 static int __init early_smt(char *s)
 {
 	get_option(&s, &smp_max_threads);
···
 	lc->percpu_offset = __per_cpu_offset[cpu];
 	lc->kernel_asce = get_lowcore()->kernel_asce;
 	lc->user_asce = s390_invalid_asce;
-	lc->machine_flags = get_lowcore()->machine_flags;
 	lc->user_timer = lc->system_timer =
 		lc->steal_timer = lc->avg_steal_timer = 0;
 	abs_lc = get_abs_lowcore();
···
 	mtid = boot_core_type ? sclp.mtid : sclp.mtid_cp;
 	mtid = (mtid < smp_max_threads) ? mtid : smp_max_threads - 1;
 	pcpu_set_smt(mtid);
+	cpu_smt_set_num_threads(smp_cpu_mtid + 1, smp_cpu_mtid + 1);
 
 	/* Print number of CPUs */
 	c_cpus = s_cpus = 0;

arch/s390/kernel/stacktrace.c

···
 #include <linux/stacktrace.h>
 #include <linux/uaccess.h>
 #include <linux/compat.h>
+#include <asm/asm-offsets.h>
 #include <asm/stacktrace.h>
 #include <asm/unwind.h>
 #include <asm/kprobes.h>

arch/s390/mm/fault.c

···
 	if (unlikely(!teid.b61)) {
 		if (user_mode(regs)) {
 			/* Low-address protection in user mode: cannot happen */
+			dump_fault_info(regs);
 			die(regs, "Low-address protection");
 		}
 		/*

arch/s390/mm/pfault.c

···
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <asm/asm-extable.h>
+#include <asm/asm-offsets.h>
 #include <asm/pfault.h>
 #include <asm/diag.h>
 

arch/s390/pci/pci_bus.c

···
 static void pci_dma_range_setup(struct pci_dev *pdev)
 {
 	struct zpci_dev *zdev = to_zpci(pdev);
-	struct bus_dma_region *map;
-	u64 aligned_end;
+	u64 aligned_end, size;
+	dma_addr_t dma_start;
+	int ret;
 
-	map = kzalloc(sizeof(*map), GFP_KERNEL);
-	if (!map)
-		return;
-
-	map->cpu_start = 0;
-	map->dma_start = PAGE_ALIGN(zdev->start_dma);
+	dma_start = PAGE_ALIGN(zdev->start_dma);
 	aligned_end = PAGE_ALIGN_DOWN(zdev->end_dma + 1);
-	if (aligned_end >= map->dma_start)
-		map->size = aligned_end - map->dma_start;
+	if (aligned_end >= dma_start)
+		size = aligned_end - dma_start;
 	else
-		map->size = 0;
-	WARN_ON_ONCE(map->size == 0);
+		size = 0;
+	WARN_ON_ONCE(size == 0);
 
-	pdev->dev.dma_range_map = map;
+	ret = dma_direct_set_offset(&pdev->dev, 0, dma_start, size);
+	if (ret)
+		pr_err("Failed to allocate DMA range map for %s\n", pci_name(pdev));
 }
 
 void pcibios_bus_add_device(struct pci_dev *pdev)
···
 static bool zpci_bus_is_isolated_vf(struct zpci_bus *zbus, struct zpci_dev *zdev)
 {
 	struct pci_dev *pdev;
+
+	if (!zdev->vfn)
+		return false;
 
 	pdev = zpci_iov_find_parent_pf(zbus, zdev);
 	if (!pdev)

drivers/s390/crypto/vfio_ap_ops.c

···
 	vfio_put_device(&matrix_mdev->vdev);
 }
 
-#define MDEV_SHARING_ERR "Userspace may not re-assign queue %02lx.%04lx " \
-			 "already assigned to %s"
+#define MDEV_SHARING_ERR "Userspace may not assign queue %02lx.%04lx to mdev: already assigned to %s"
 
-static void vfio_ap_mdev_log_sharing_err(struct ap_matrix_mdev *matrix_mdev,
-					 unsigned long *apm,
-					 unsigned long *aqm)
+#define MDEV_IN_USE_ERR "Can not reserve queue %02lx.%04lx for host driver: in use by mdev"
+
+static void vfio_ap_mdev_log_sharing_err(struct ap_matrix_mdev *assignee,
+					 struct ap_matrix_mdev *assigned_to,
+					 unsigned long *apm, unsigned long *aqm)
 {
 	unsigned long apid, apqi;
-	const struct device *dev = mdev_dev(matrix_mdev->mdev);
-	const char *mdev_name = dev_name(dev);
 
-	for_each_set_bit_inv(apid, apm, AP_DEVICES)
+	for_each_set_bit_inv(apid, apm, AP_DEVICES) {
+		for_each_set_bit_inv(apqi, aqm, AP_DOMAINS) {
+			dev_warn(mdev_dev(assignee->mdev), MDEV_SHARING_ERR,
+				 apid, apqi, dev_name(mdev_dev(assigned_to->mdev)));
+		}
+	}
+}
+
+static void vfio_ap_mdev_log_in_use_err(struct ap_matrix_mdev *assignee,
+					unsigned long *apm, unsigned long *aqm)
+{
+	unsigned long apid, apqi;
+
+	for_each_set_bit_inv(apid, apm, AP_DEVICES) {
 		for_each_set_bit_inv(apqi, aqm, AP_DOMAINS)
-			dev_warn(dev, MDEV_SHARING_ERR, apid, apqi, mdev_name);
+			dev_warn(mdev_dev(assignee->mdev), MDEV_IN_USE_ERR, apid, apqi);
+	}
 }
 
 /**
  * vfio_ap_mdev_verify_no_sharing - verify APQNs are not shared by matrix mdevs
  *
+ * @assignee: the matrix mdev to which @mdev_apm and @mdev_aqm are being
+ *	      assigned; or, NULL if this function was called by the AP bus
+ *	      driver in_use callback to verify none of the APQNs being reserved
+ *	      for the host device driver are in use by a vfio_ap mediated device
  * @mdev_apm: mask indicating the APIDs of the APQNs to be verified
  * @mdev_aqm: mask indicating the APQIs of the APQNs to be verified
  *
- * Verifies that each APQN derived from the Cartesian product of a bitmap of
- * AP adapter IDs and AP queue indexes is not configured for any matrix
- * mediated device. AP queue sharing is not allowed.
+ * Verifies that each APQN derived from the Cartesian product of APIDs
+ * represented by the bits set in @mdev_apm and the APQIs of the bits set in
+ * @mdev_aqm is not assigned to a mediated device other than the mdev to which
+ * the APQN is being assigned (@assignee). AP queue sharing is not allowed.
  *
  * Return: 0 if the APQNs are not shared; otherwise return -EADDRINUSE.
  */
-static int vfio_ap_mdev_verify_no_sharing(unsigned long *mdev_apm,
+static int vfio_ap_mdev_verify_no_sharing(struct ap_matrix_mdev *assignee,
+					  unsigned long *mdev_apm,
 					  unsigned long *mdev_aqm)
 {
-	struct ap_matrix_mdev *matrix_mdev;
+	struct ap_matrix_mdev *assigned_to;
 	DECLARE_BITMAP(apm, AP_DEVICES);
 	DECLARE_BITMAP(aqm, AP_DOMAINS);
 
-	list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node) {
+	list_for_each_entry(assigned_to, &matrix_dev->mdev_list, node) {
 		/*
-		 * If the input apm and aqm are fields of the matrix_mdev
-		 * object, then move on to the next matrix_mdev.
+		 * If the mdev to which the mdev_apm and mdev_aqm is being
+		 * assigned is the same as the mdev being verified
 		 */
-		if (mdev_apm == matrix_mdev->matrix.apm &&
-		    mdev_aqm == matrix_mdev->matrix.aqm)
+		if (assignee == assigned_to)
 			continue;
 
 		memset(apm, 0, sizeof(apm));
···
 		 * We work on full longs, as we can only exclude the leftover
 		 * bits in non-inverse order. The leftover is all zeros.
 		 */
-		if (!bitmap_and(apm, mdev_apm, matrix_mdev->matrix.apm,
-				AP_DEVICES))
+		if (!bitmap_and(apm, mdev_apm, assigned_to->matrix.apm,	AP_DEVICES))
 			continue;
 
-		if (!bitmap_and(aqm, mdev_aqm, matrix_mdev->matrix.aqm,
-				AP_DOMAINS))
+		if (!bitmap_and(aqm, mdev_aqm, assigned_to->matrix.aqm,	AP_DOMAINS))
 			continue;
 
-		vfio_ap_mdev_log_sharing_err(matrix_mdev, apm, aqm);
+		if (assignee)
+			vfio_ap_mdev_log_sharing_err(assignee, assigned_to, apm, aqm);
+		else
+			vfio_ap_mdev_log_in_use_err(assigned_to, apm, aqm);
 
 		return -EADDRINUSE;
 	}
···
 					       matrix_mdev->matrix.aqm))
 		return -EADDRNOTAVAIL;
 
-	return vfio_ap_mdev_verify_no_sharing(matrix_mdev->matrix.apm,
+	return vfio_ap_mdev_verify_no_sharing(matrix_mdev,
+					      matrix_mdev->matrix.apm,
 					      matrix_mdev->matrix.aqm);
 }
 
···
 
 	mutex_lock(&matrix_dev->guests_lock);
 	mutex_lock(&matrix_dev->mdevs_lock);
-	ret = vfio_ap_mdev_verify_no_sharing(apm, aqm);
+	ret = vfio_ap_mdev_verify_no_sharing(NULL, apm, aqm);
 	mutex_unlock(&matrix_dev->mdevs_lock);
 	mutex_unlock(&matrix_dev->guests_lock);