Merge tag 'loongarch-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch updates from Huacai Chen:

- preliminary ClangBuiltLinux enablement

- add support to clone a time namespace

- add vector extensions support

- add SMT (Simultaneous Multi-Threading) support

- support dbar with different hints

- introduce hardware page table walker

- add jump-label implementation

- add rethook and uprobes support

- some bug fixes and other small changes

* tag 'loongarch-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (28 commits)
LoongArch: Remove five DIE_* definitions in kdebug.h
LoongArch: Add uprobes support
LoongArch: Use larch_insn_gen_break() for kprobes
LoongArch: Add larch_insn_gen_break() to generate break insns
LoongArch: Check for AMO instructions in insns_not_supported()
LoongArch: Move three functions from kprobes.c to inst.c
LoongArch: Replace kretprobe with rethook
LoongArch: Add jump-label implementation
LoongArch: Select HAVE_DEBUG_KMEMLEAK to support kmemleak
LoongArch: Export some arch-specific pm interfaces
LoongArch: Introduce hardware page table walker
LoongArch: Support dbar with different hints
LoongArch: Add SMT (Simultaneous Multi-Threading) support
LoongArch: Add vector extensions support
LoongArch: Add support to clone a time namespace
Makefile: Add loongarch target flag for Clang compilation
LoongArch: Mark Clang LTO as working
LoongArch: Include KBUILD_CPPFLAGS in CHECKFLAGS invocation
LoongArch: vDSO: Use CLANG_FLAGS instead of filtering out '--target='
LoongArch: Tweak CFLAGS for Clang compatibility
...

Documentation/features/core/jump-labels/arch-support.txt

···
     |        csky: |  ok  |
     |     hexagon: | TODO |
     |        ia64: | TODO |
-    |   loongarch: | TODO |
+    |   loongarch: |  ok  |
     |        m68k: | TODO |
     |  microblaze: | TODO |
     |        mips: |  ok  |

Documentation/features/debug/kmemleak/arch-support.txt

···
     |        csky: |  ok  |
     |     hexagon: | TODO |
     |        ia64: | TODO |
-    |   loongarch: | TODO |
+    |   loongarch: |  ok  |
     |        m68k: | TODO |
     |  microblaze: |  ok  |
     |        mips: |  ok  |

arch/loongarch/Kconfig

···
 	select ACPI
 	select ACPI_GENERIC_GSI if ACPI
 	select ACPI_MCFG if ACPI
+	select ACPI_PPTT if ACPI
 	select ACPI_SYSTEM_POWER_STATES_SUPPORT	if ACPI
 	select ARCH_BINFMT_ELF_STATE
 	select ARCH_ENABLE_MEMORY_HOTPLUG
···
 	select ARCH_SUPPORTS_ACPI
 	select ARCH_SUPPORTS_ATOMIC_RMW
 	select ARCH_SUPPORTS_HUGETLBFS
+	select ARCH_SUPPORTS_LTO_CLANG
+	select ARCH_SUPPORTS_LTO_CLANG_THIN
 	select ARCH_SUPPORTS_NUMA_BALANCING
 	select ARCH_USE_BUILTIN_BSWAP
 	select ARCH_USE_CMPXCHG_LOCKREF
···
 	select GENERIC_SCHED_CLOCK
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_TIME_VSYSCALL
+	select GENERIC_VDSO_TIME_NS
 	select GPIOLIB
 	select HAS_IOPORT
 	select HAVE_ARCH_AUDITSYSCALL
+	select HAVE_ARCH_JUMP_LABEL
+	select HAVE_ARCH_JUMP_LABEL_RELATIVE
 	select HAVE_ARCH_MMAP_RND_BITS if MMU
 	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ARCH_TRACEHOOK
···
 	select HAVE_ASM_MODVERSIONS
 	select HAVE_CONTEXT_TRACKING_USER
 	select HAVE_C_RECORDMCOUNT
+	select HAVE_DEBUG_KMEMLEAK
 	select HAVE_DEBUG_STACKOVERFLOW
 	select HAVE_DMA_CONTIGUOUS
 	select HAVE_DYNAMIC_FTRACE
···
 	select HAVE_PERF_REGS
 	select HAVE_PERF_USER_STACK_DUMP
 	select HAVE_REGS_AND_STACK_ACCESS_API
+	select HAVE_RETHOOK
 	select HAVE_RSEQ
 	select HAVE_SAMPLE_FTRACE_DIRECT
 	select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
···
 
 config 64BIT
 	def_bool y
-
-config CPU_HAS_FPU
-	bool
-	default y
-
-config CPU_HAS_PREFETCH
-	bool
-	default y
 
 config GENERIC_BUG
 	def_bool y
···
 
 config AS_HAS_EXPLICIT_RELOCS
 	def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x))
+
+config AS_HAS_FCSR_CLASS
+	def_bool $(as-instr,movfcsr2gr \$t0$(comma)\$fcsr0)
+
+config AS_HAS_LSX_EXTENSION
+	def_bool $(as-instr,vld \$vr0$(comma)\$a0$(comma)0)
+
+config AS_HAS_LASX_EXTENSION
+	def_bool $(as-instr,xvld \$xr0$(comma)\$a0$(comma)0)
 
 menu "Kernel type and options"
 
···
 	  This kernel feature allows the kernel to be loaded directly by
 	  EFI firmware without the use of a bootloader.
 
+config SCHED_SMT
+	bool "SMT scheduler support"
+	default y
+	help
+	  Improves scheduler's performance when there are multiple
+	  threads in one physical core.
+
 config SMP
 	bool "Multi-Processing support"
 	help
···
 	  to run kernel only on systems with h/w unaligned access support in
 	  order to optimise for performance.
 
+config CPU_HAS_FPU
+	bool
+	default y
+
+config CPU_HAS_LSX
+	bool "Support for the Loongson SIMD Extension"
+	depends on AS_HAS_LSX_EXTENSION
+	help
+	  Loongson SIMD Extension (LSX) introduces 128 bit wide vector registers
+	  and a set of SIMD instructions to operate on them. When this option
+	  is enabled the kernel will support allocating & switching LSX
+	  vector register contexts. If you know that your kernel will only be
+	  running on CPUs which do not support LSX or that your userland will
+	  not be making use of it then you may wish to say N here to reduce
+	  the size & complexity of your kernel.
+
+	  If unsure, say Y.
+
+config CPU_HAS_LASX
+	bool "Support for the Loongson Advanced SIMD Extension"
+	depends on CPU_HAS_LSX
+	depends on AS_HAS_LASX_EXTENSION
+	help
+	  Loongson Advanced SIMD Extension (LASX) introduces 256 bit wide vector
+	  registers and a set of SIMD instructions to operate on them. When this
+	  option is enabled the kernel will support allocating & switching LASX
+	  vector register contexts. If you know that your kernel will only be
+	  running on CPUs which do not support LASX or that your userland will
+	  not be making use of it then you may wish to say N here to reduce
+	  the size & complexity of your kernel.
+
+	  If unsure, say Y.
+
+config CPU_HAS_PREFETCH
+	bool
+	default y
+
 config KEXEC
 	bool "Kexec system call"
 	select KEXEC_CORE
···
 
 config ARCH_MMAP_RND_BITS_MAX
 	default 18
+
+config ARCH_SUPPORTS_UPROBES
+	def_bool y
 
 menu "Power management options"
 

arch/loongarch/Makefile

···
 cflags-y		+= -mabi=lp64s
 endif
 
-cflags-y			+= -G0 -pipe -msoft-float
-LDFLAGS_vmlinux			+= -G0 -static -n -nostdlib
+cflags-y			+= -pipe -msoft-float
+LDFLAGS_vmlinux			+= -static -n -nostdlib
 
 # When the assembler supports explicit relocation hint, we must use it.
 # GCC may have -mexplicit-relocs off by default if it was built with an old
···
 # When the assembler does not supports explicit relocation hint, we can't use
 # it.  Disable it if the compiler supports it.
 #
-# If you've seen "unknown reloc hint" message building the kernel and you are
-# now wondering why "-mexplicit-relocs" is not wrapped with cc-option: the
-# combination of a "new" assembler and "old" compiler is not supported.  Either
-# upgrade the compiler or downgrade the assembler.
+# The combination of a "new" assembler and "old" GCC is not supported, given
+# the rarity of this combo and the extra complexity needed to make it work.
+# Either upgrade the compiler or downgrade the assembler; the build will error
+# out if it is the case (by probing for the model attribute; all supported
+# compilers in this case would have support).
+#
+# Also, -mdirect-extern-access is useful in case of building with explicit
+# relocs, for avoiding unnecessary GOT accesses. It is harmless to not have
+# support though.
 ifdef CONFIG_AS_HAS_EXPLICIT_RELOCS
-cflags-y			+= -mexplicit-relocs
-KBUILD_CFLAGS_KERNEL		+= -mdirect-extern-access
+cflags-y			+= $(call cc-option,-mexplicit-relocs)
+KBUILD_CFLAGS_KERNEL		+= $(call cc-option,-mdirect-extern-access)
 else
 cflags-y			+= $(call cc-option,-mno-explicit-relocs)
 KBUILD_AFLAGS_KERNEL		+= -Wa,-mla-global-with-pcrel
···
 KBUILD_LDFLAGS	+= -m $(ld-emul)
 
 ifdef CONFIG_LOONGARCH
-CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
+CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 	grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
 	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
 endif

arch/loongarch/include/asm/Kbuild

···
 generic-y += parport.h
 generic-y += early_ioremap.h
 generic-y += qrwlock.h
-generic-y += qspinlock.h
 generic-y += rwsem.h
 generic-y += segment.h
 generic-y += user.h

arch/loongarch/include/asm/acpi.h

···
 #ifndef _ASM_LOONGARCH_ACPI_H
 #define _ASM_LOONGARCH_ACPI_H
 
+#include <asm/suspend.h>
+
 #ifdef CONFIG_ACPI
 extern int acpi_strict;
 extern int acpi_disabled;
 extern int acpi_pci_disabled;
 extern int acpi_noirq;
+extern int pptt_enabled;
 
 #define acpi_os_ioremap acpi_os_ioremap
 void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size);
···
 }
 
 extern struct list_head acpi_wakeup_device_list;
+extern struct acpi_madt_core_pic acpi_core_pic[NR_CPUS];
+
+extern int __init parse_acpi_topology(void);
+
+static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
+{
+	return acpi_core_pic[cpu_logical_map(cpu)].processor_id;
+}
 
 #endif /* !CONFIG_ACPI */
 
···
 
 extern int loongarch_acpi_suspend(void);
 extern int (*acpi_suspend_lowlevel)(void);
-extern void loongarch_suspend_enter(void);
 
 static inline unsigned long acpi_get_wakeup_address(void)
 {
 #ifdef CONFIG_SUSPEND
-	extern void loongarch_wakeup_start(void);
 	return (unsigned long)loongarch_wakeup_start;
 #endif
 	return 0UL;

arch/loongarch/include/asm/asmmacro.h

···
 	fld.d	$f31, \tmp, THREAD_FPR31 - THREAD_FPR0
 	.endm
 
+	.macro	lsx_save_data thread tmp
+	li.w	\tmp, THREAD_FPR0
+	PTR_ADD \tmp, \thread, \tmp
+	vst	$vr0, \tmp, THREAD_FPR0  - THREAD_FPR0
+	vst	$vr1, \tmp, THREAD_FPR1  - THREAD_FPR0
+	vst	$vr2, \tmp, THREAD_FPR2  - THREAD_FPR0
+	vst	$vr3, \tmp, THREAD_FPR3  - THREAD_FPR0
+	vst	$vr4, \tmp, THREAD_FPR4  - THREAD_FPR0
+	vst	$vr5, \tmp, THREAD_FPR5  - THREAD_FPR0
+	vst	$vr6, \tmp, THREAD_FPR6  - THREAD_FPR0
+	vst	$vr7, \tmp, THREAD_FPR7  - THREAD_FPR0
+	vst	$vr8, \tmp, THREAD_FPR8  - THREAD_FPR0
+	vst	$vr9, \tmp, THREAD_FPR9  - THREAD_FPR0
+	vst	$vr10, \tmp, THREAD_FPR10 - THREAD_FPR0
+	vst	$vr11, \tmp, THREAD_FPR11 - THREAD_FPR0
+	vst	$vr12, \tmp, THREAD_FPR12 - THREAD_FPR0
+	vst	$vr13, \tmp, THREAD_FPR13 - THREAD_FPR0
+	vst	$vr14, \tmp, THREAD_FPR14 - THREAD_FPR0
+	vst	$vr15, \tmp, THREAD_FPR15 - THREAD_FPR0
+	vst	$vr16, \tmp, THREAD_FPR16 - THREAD_FPR0
+	vst	$vr17, \tmp, THREAD_FPR17 - THREAD_FPR0
+	vst	$vr18, \tmp, THREAD_FPR18 - THREAD_FPR0
+	vst	$vr19, \tmp, THREAD_FPR19 - THREAD_FPR0
+	vst	$vr20, \tmp, THREAD_FPR20 - THREAD_FPR0
+	vst	$vr21, \tmp, THREAD_FPR21 - THREAD_FPR0
+	vst	$vr22, \tmp, THREAD_FPR22 - THREAD_FPR0
+	vst	$vr23, \tmp, THREAD_FPR23 - THREAD_FPR0
+	vst	$vr24, \tmp, THREAD_FPR24 - THREAD_FPR0
+	vst	$vr25, \tmp, THREAD_FPR25 - THREAD_FPR0
+	vst	$vr26, \tmp, THREAD_FPR26 - THREAD_FPR0
+	vst	$vr27, \tmp, THREAD_FPR27 - THREAD_FPR0
+	vst	$vr28, \tmp, THREAD_FPR28 - THREAD_FPR0
+	vst	$vr29, \tmp, THREAD_FPR29 - THREAD_FPR0
+	vst	$vr30, \tmp, THREAD_FPR30 - THREAD_FPR0
+	vst	$vr31, \tmp, THREAD_FPR31 - THREAD_FPR0
+	.endm
+
+	.macro	lsx_restore_data thread tmp
+	li.w	\tmp, THREAD_FPR0
+	PTR_ADD	\tmp, \thread, \tmp
+	vld	$vr0, \tmp, THREAD_FPR0  - THREAD_FPR0
+	vld	$vr1, \tmp, THREAD_FPR1  - THREAD_FPR0
+	vld	$vr2, \tmp, THREAD_FPR2  - THREAD_FPR0
+	vld	$vr3, \tmp, THREAD_FPR3  - THREAD_FPR0
+	vld	$vr4, \tmp, THREAD_FPR4  - THREAD_FPR0
+	vld	$vr5, \tmp, THREAD_FPR5  - THREAD_FPR0
+	vld	$vr6, \tmp, THREAD_FPR6  - THREAD_FPR0
+	vld	$vr7, \tmp, THREAD_FPR7  - THREAD_FPR0
+	vld	$vr8, \tmp, THREAD_FPR8  - THREAD_FPR0
+	vld	$vr9, \tmp, THREAD_FPR9  - THREAD_FPR0
+	vld	$vr10, \tmp, THREAD_FPR10 - THREAD_FPR0
+	vld	$vr11, \tmp, THREAD_FPR11 - THREAD_FPR0
+	vld	$vr12, \tmp, THREAD_FPR12 - THREAD_FPR0
+	vld	$vr13, \tmp, THREAD_FPR13 - THREAD_FPR0
+	vld	$vr14, \tmp, THREAD_FPR14 - THREAD_FPR0
+	vld	$vr15, \tmp, THREAD_FPR15 - THREAD_FPR0
+	vld	$vr16, \tmp, THREAD_FPR16 - THREAD_FPR0
+	vld	$vr17, \tmp, THREAD_FPR17 - THREAD_FPR0
+	vld	$vr18, \tmp, THREAD_FPR18 - THREAD_FPR0
+	vld	$vr19, \tmp, THREAD_FPR19 - THREAD_FPR0
+	vld	$vr20, \tmp, THREAD_FPR20 - THREAD_FPR0
+	vld	$vr21, \tmp, THREAD_FPR21 - THREAD_FPR0
+	vld	$vr22, \tmp, THREAD_FPR22 - THREAD_FPR0
+	vld	$vr23, \tmp, THREAD_FPR23 - THREAD_FPR0
+	vld	$vr24, \tmp, THREAD_FPR24 - THREAD_FPR0
+	vld	$vr25, \tmp, THREAD_FPR25 - THREAD_FPR0
+	vld	$vr26, \tmp, THREAD_FPR26 - THREAD_FPR0
+	vld	$vr27, \tmp, THREAD_FPR27 - THREAD_FPR0
+	vld	$vr28, \tmp, THREAD_FPR28 - THREAD_FPR0
+	vld	$vr29, \tmp, THREAD_FPR29 - THREAD_FPR0
+	vld	$vr30, \tmp, THREAD_FPR30 - THREAD_FPR0
+	vld	$vr31, \tmp, THREAD_FPR31 - THREAD_FPR0
+	.endm
+
+	.macro	lsx_save_all	thread tmp0 tmp1
+	fpu_save_cc		\thread, \tmp0, \tmp1
+	fpu_save_csr		\thread, \tmp0
+	lsx_save_data		\thread, \tmp0
+	.endm
+
+	.macro	lsx_restore_all	thread tmp0 tmp1
+	lsx_restore_data	\thread, \tmp0
+	fpu_restore_cc		\thread, \tmp0, \tmp1
+	fpu_restore_csr		\thread, \tmp0
+	.endm
+
+	.macro	lsx_save_upper vd base tmp off
+	vpickve2gr.d	\tmp, \vd, 1
+	st.d		\tmp, \base, (\off+8)
+	.endm
+
+	.macro	lsx_save_all_upper thread base tmp
+	li.w		\tmp, THREAD_FPR0
+	PTR_ADD		\base, \thread, \tmp
+	lsx_save_upper	$vr0,  \base, \tmp, (THREAD_FPR0-THREAD_FPR0)
+	lsx_save_upper	$vr1,  \base, \tmp, (THREAD_FPR1-THREAD_FPR0)
+	lsx_save_upper	$vr2,  \base, \tmp, (THREAD_FPR2-THREAD_FPR0)
+	lsx_save_upper	$vr3,  \base, \tmp, (THREAD_FPR3-THREAD_FPR0)
+	lsx_save_upper	$vr4,  \base, \tmp, (THREAD_FPR4-THREAD_FPR0)
+	lsx_save_upper	$vr5,  \base, \tmp, (THREAD_FPR5-THREAD_FPR0)
+	lsx_save_upper	$vr6,  \base, \tmp, (THREAD_FPR6-THREAD_FPR0)
+	lsx_save_upper	$vr7,  \base, \tmp, (THREAD_FPR7-THREAD_FPR0)
+	lsx_save_upper	$vr8,  \base, \tmp, (THREAD_FPR8-THREAD_FPR0)
+	lsx_save_upper	$vr9,  \base, \tmp, (THREAD_FPR9-THREAD_FPR0)
+	lsx_save_upper	$vr10, \base, \tmp, (THREAD_FPR10-THREAD_FPR0)
+	lsx_save_upper	$vr11, \base, \tmp, (THREAD_FPR11-THREAD_FPR0)
+	lsx_save_upper	$vr12, \base, \tmp, (THREAD_FPR12-THREAD_FPR0)
+	lsx_save_upper	$vr13, \base, \tmp, (THREAD_FPR13-THREAD_FPR0)
+	lsx_save_upper	$vr14, \base, \tmp, (THREAD_FPR14-THREAD_FPR0)
+	lsx_save_upper	$vr15, \base, \tmp, (THREAD_FPR15-THREAD_FPR0)
+	lsx_save_upper	$vr16, \base, \tmp, (THREAD_FPR16-THREAD_FPR0)
+	lsx_save_upper	$vr17, \base, \tmp, (THREAD_FPR17-THREAD_FPR0)
+	lsx_save_upper	$vr18, \base, \tmp, (THREAD_FPR18-THREAD_FPR0)
+	lsx_save_upper	$vr19, \base, \tmp, (THREAD_FPR19-THREAD_FPR0)
+	lsx_save_upper	$vr20, \base, \tmp, (THREAD_FPR20-THREAD_FPR0)
+	lsx_save_upper	$vr21, \base, \tmp, (THREAD_FPR21-THREAD_FPR0)
+	lsx_save_upper	$vr22, \base, \tmp, (THREAD_FPR22-THREAD_FPR0)
+	lsx_save_upper	$vr23, \base, \tmp, (THREAD_FPR23-THREAD_FPR0)
+	lsx_save_upper	$vr24, \base, \tmp, (THREAD_FPR24-THREAD_FPR0)
+	lsx_save_upper	$vr25, \base, \tmp, (THREAD_FPR25-THREAD_FPR0)
+	lsx_save_upper	$vr26, \base, \tmp, (THREAD_FPR26-THREAD_FPR0)
+	lsx_save_upper	$vr27, \base, \tmp, (THREAD_FPR27-THREAD_FPR0)
+	lsx_save_upper	$vr28, \base, \tmp, (THREAD_FPR28-THREAD_FPR0)
+	lsx_save_upper	$vr29, \base, \tmp, (THREAD_FPR29-THREAD_FPR0)
+	lsx_save_upper	$vr30, \base, \tmp, (THREAD_FPR30-THREAD_FPR0)
+	lsx_save_upper	$vr31, \base, \tmp, (THREAD_FPR31-THREAD_FPR0)
+	.endm
+
+	.macro	lsx_restore_upper vd base tmp off
+	ld.d		\tmp, \base, (\off+8)
+	vinsgr2vr.d	\vd,  \tmp, 1
+	.endm
+
+	.macro	lsx_restore_all_upper thread base tmp
+	li.w		  \tmp, THREAD_FPR0
+	PTR_ADD		  \base, \thread, \tmp
+	lsx_restore_upper $vr0,  \base, \tmp, (THREAD_FPR0-THREAD_FPR0)
+	lsx_restore_upper $vr1,  \base, \tmp, (THREAD_FPR1-THREAD_FPR0)
+	lsx_restore_upper $vr2,  \base, \tmp, (THREAD_FPR2-THREAD_FPR0)
+	lsx_restore_upper $vr3,  \base, \tmp, (THREAD_FPR3-THREAD_FPR0)
+	lsx_restore_upper $vr4,  \base, \tmp, (THREAD_FPR4-THREAD_FPR0)
+	lsx_restore_upper $vr5,  \base, \tmp, (THREAD_FPR5-THREAD_FPR0)
+	lsx_restore_upper $vr6,  \base, \tmp, (THREAD_FPR6-THREAD_FPR0)
+	lsx_restore_upper $vr7,  \base, \tmp, (THREAD_FPR7-THREAD_FPR0)
+	lsx_restore_upper $vr8,  \base, \tmp, (THREAD_FPR8-THREAD_FPR0)
+	lsx_restore_upper $vr9,  \base, \tmp, (THREAD_FPR9-THREAD_FPR0)
+	lsx_restore_upper $vr10, \base, \tmp, (THREAD_FPR10-THREAD_FPR0)
+	lsx_restore_upper $vr11, \base, \tmp, (THREAD_FPR11-THREAD_FPR0)
+	lsx_restore_upper $vr12, \base, \tmp, (THREAD_FPR12-THREAD_FPR0)
+	lsx_restore_upper $vr13, \base, \tmp, (THREAD_FPR13-THREAD_FPR0)
+	lsx_restore_upper $vr14, \base, \tmp, (THREAD_FPR14-THREAD_FPR0)
+	lsx_restore_upper $vr15, \base, \tmp, (THREAD_FPR15-THREAD_FPR0)
+	lsx_restore_upper $vr16, \base, \tmp, (THREAD_FPR16-THREAD_FPR0)
+	lsx_restore_upper $vr17, \base, \tmp, (THREAD_FPR17-THREAD_FPR0)
+	lsx_restore_upper $vr18, \base, \tmp, (THREAD_FPR18-THREAD_FPR0)
+	lsx_restore_upper $vr19, \base, \tmp, (THREAD_FPR19-THREAD_FPR0)
+	lsx_restore_upper $vr20, \base, \tmp, (THREAD_FPR20-THREAD_FPR0)
+	lsx_restore_upper $vr21, \base, \tmp, (THREAD_FPR21-THREAD_FPR0)
+	lsx_restore_upper $vr22, \base, \tmp, (THREAD_FPR22-THREAD_FPR0)
+	lsx_restore_upper $vr23, \base, \tmp, (THREAD_FPR23-THREAD_FPR0)
+	lsx_restore_upper $vr24, \base, \tmp, (THREAD_FPR24-THREAD_FPR0)
+	lsx_restore_upper $vr25, \base, \tmp, (THREAD_FPR25-THREAD_FPR0)
+	lsx_restore_upper $vr26, \base, \tmp, (THREAD_FPR26-THREAD_FPR0)
+	lsx_restore_upper $vr27, \base, \tmp, (THREAD_FPR27-THREAD_FPR0)
+	lsx_restore_upper $vr28, \base, \tmp, (THREAD_FPR28-THREAD_FPR0)
+	lsx_restore_upper $vr29, \base, \tmp, (THREAD_FPR29-THREAD_FPR0)
+	lsx_restore_upper $vr30, \base, \tmp, (THREAD_FPR30-THREAD_FPR0)
+	lsx_restore_upper $vr31, \base, \tmp, (THREAD_FPR31-THREAD_FPR0)
+	.endm
+
+	.macro	lsx_init_upper vd tmp
+	vinsgr2vr.d	\vd, \tmp, 1
+	.endm
+
+	.macro	lsx_init_all_upper tmp
+	not		\tmp, zero
+	lsx_init_upper	$vr0 \tmp
+	lsx_init_upper	$vr1 \tmp
+	lsx_init_upper	$vr2 \tmp
+	lsx_init_upper	$vr3 \tmp
+	lsx_init_upper	$vr4 \tmp
+	lsx_init_upper	$vr5 \tmp
+	lsx_init_upper	$vr6 \tmp
+	lsx_init_upper	$vr7 \tmp
+	lsx_init_upper	$vr8 \tmp
+	lsx_init_upper	$vr9 \tmp
+	lsx_init_upper	$vr10 \tmp
+	lsx_init_upper	$vr11 \tmp
+	lsx_init_upper	$vr12 \tmp
+	lsx_init_upper	$vr13 \tmp
+	lsx_init_upper	$vr14 \tmp
+	lsx_init_upper	$vr15 \tmp
+	lsx_init_upper	$vr16 \tmp
+	lsx_init_upper	$vr17 \tmp
+	lsx_init_upper	$vr18 \tmp
+	lsx_init_upper	$vr19 \tmp
+	lsx_init_upper	$vr20 \tmp
+	lsx_init_upper	$vr21 \tmp
+	lsx_init_upper	$vr22 \tmp
+	lsx_init_upper	$vr23 \tmp
+	lsx_init_upper	$vr24 \tmp
+	lsx_init_upper	$vr25 \tmp
+	lsx_init_upper	$vr26 \tmp
+	lsx_init_upper	$vr27 \tmp
+	lsx_init_upper	$vr28 \tmp
+	lsx_init_upper	$vr29 \tmp
+	lsx_init_upper	$vr30 \tmp
+	lsx_init_upper	$vr31 \tmp
+	.endm
+
+	.macro	lasx_save_data thread tmp
+	li.w	\tmp, THREAD_FPR0
+	PTR_ADD	\tmp, \thread, \tmp
+	xvst	$xr0, \tmp, THREAD_FPR0  - THREAD_FPR0
+	xvst	$xr1, \tmp, THREAD_FPR1  - THREAD_FPR0
+	xvst	$xr2, \tmp, THREAD_FPR2  - THREAD_FPR0
+	xvst	$xr3, \tmp, THREAD_FPR3  - THREAD_FPR0
+	xvst	$xr4, \tmp, THREAD_FPR4  - THREAD_FPR0
+	xvst	$xr5, \tmp, THREAD_FPR5  - THREAD_FPR0
+	xvst	$xr6, \tmp, THREAD_FPR6  - THREAD_FPR0
+	xvst	$xr7, \tmp, THREAD_FPR7  - THREAD_FPR0
+	xvst	$xr8, \tmp, THREAD_FPR8  - THREAD_FPR0
+	xvst	$xr9, \tmp, THREAD_FPR9  - THREAD_FPR0
+	xvst	$xr10, \tmp, THREAD_FPR10 - THREAD_FPR0
+	xvst	$xr11, \tmp, THREAD_FPR11 - THREAD_FPR0
+	xvst	$xr12, \tmp, THREAD_FPR12 - THREAD_FPR0
+	xvst	$xr13, \tmp, THREAD_FPR13 - THREAD_FPR0
+	xvst	$xr14, \tmp, THREAD_FPR14 - THREAD_FPR0
+	xvst	$xr15, \tmp, THREAD_FPR15 - THREAD_FPR0
+	xvst	$xr16, \tmp, THREAD_FPR16 - THREAD_FPR0
+	xvst	$xr17, \tmp, THREAD_FPR17 - THREAD_FPR0
+	xvst	$xr18, \tmp, THREAD_FPR18 - THREAD_FPR0
+	xvst	$xr19, \tmp, THREAD_FPR19 - THREAD_FPR0
+	xvst	$xr20, \tmp, THREAD_FPR20 - THREAD_FPR0
+	xvst	$xr21, \tmp, THREAD_FPR21 - THREAD_FPR0
+	xvst	$xr22, \tmp, THREAD_FPR22 - THREAD_FPR0
+	xvst	$xr23, \tmp, THREAD_FPR23 - THREAD_FPR0
+	xvst	$xr24, \tmp, THREAD_FPR24 - THREAD_FPR0
+	xvst	$xr25, \tmp, THREAD_FPR25 - THREAD_FPR0
+	xvst	$xr26, \tmp, THREAD_FPR26 - THREAD_FPR0
+	xvst	$xr27, \tmp, THREAD_FPR27 - THREAD_FPR0
+	xvst	$xr28, \tmp, THREAD_FPR28 - THREAD_FPR0
+	xvst	$xr29, \tmp, THREAD_FPR29 - THREAD_FPR0
+	xvst	$xr30, \tmp, THREAD_FPR30 - THREAD_FPR0
+	xvst	$xr31, \tmp, THREAD_FPR31 - THREAD_FPR0
+	.endm
+
+	.macro	lasx_restore_data thread tmp
+	li.w	\tmp, THREAD_FPR0
+	PTR_ADD	\tmp, \thread, \tmp
+	xvld	$xr0, \tmp, THREAD_FPR0  - THREAD_FPR0
+	xvld	$xr1, \tmp, THREAD_FPR1  - THREAD_FPR0
+	xvld	$xr2, \tmp, THREAD_FPR2  - THREAD_FPR0
+	xvld	$xr3, \tmp, THREAD_FPR3  - THREAD_FPR0
+	xvld	$xr4, \tmp, THREAD_FPR4  - THREAD_FPR0
+	xvld	$xr5, \tmp, THREAD_FPR5  - THREAD_FPR0
+	xvld	$xr6, \tmp, THREAD_FPR6  - THREAD_FPR0
+	xvld	$xr7, \tmp, THREAD_FPR7  - THREAD_FPR0
+	xvld	$xr8, \tmp, THREAD_FPR8  - THREAD_FPR0
+	xvld	$xr9, \tmp, THREAD_FPR9  - THREAD_FPR0
+	xvld	$xr10, \tmp, THREAD_FPR10 - THREAD_FPR0
+	xvld	$xr11, \tmp, THREAD_FPR11 - THREAD_FPR0
+	xvld	$xr12, \tmp, THREAD_FPR12 - THREAD_FPR0
+	xvld	$xr13, \tmp, THREAD_FPR13 - THREAD_FPR0
+	xvld	$xr14, \tmp, THREAD_FPR14 - THREAD_FPR0
+	xvld	$xr15, \tmp, THREAD_FPR15 - THREAD_FPR0
+	xvld	$xr16, \tmp, THREAD_FPR16 - THREAD_FPR0
+	xvld	$xr17, \tmp, THREAD_FPR17 - THREAD_FPR0
+	xvld	$xr18, \tmp, THREAD_FPR18 - THREAD_FPR0
+	xvld	$xr19, \tmp, THREAD_FPR19 - THREAD_FPR0
+	xvld	$xr20, \tmp, THREAD_FPR20 - THREAD_FPR0
+	xvld	$xr21, \tmp, THREAD_FPR21 - THREAD_FPR0
+	xvld	$xr22, \tmp, THREAD_FPR22 - THREAD_FPR0
+	xvld	$xr23, \tmp, THREAD_FPR23 - THREAD_FPR0
+	xvld	$xr24, \tmp, THREAD_FPR24 - THREAD_FPR0
+	xvld	$xr25, \tmp, THREAD_FPR25 - THREAD_FPR0
+	xvld	$xr26, \tmp, THREAD_FPR26 - THREAD_FPR0
+	xvld	$xr27, \tmp, THREAD_FPR27 - THREAD_FPR0
+	xvld	$xr28, \tmp, THREAD_FPR28 - THREAD_FPR0
+	xvld	$xr29, \tmp, THREAD_FPR29 - THREAD_FPR0
+	xvld	$xr30, \tmp, THREAD_FPR30 - THREAD_FPR0
+	xvld	$xr31, \tmp, THREAD_FPR31 - THREAD_FPR0
+	.endm
+
+	.macro	lasx_save_all	thread tmp0 tmp1
+	fpu_save_cc		\thread, \tmp0, \tmp1
+	fpu_save_csr		\thread, \tmp0
+	lasx_save_data		\thread, \tmp0
+	.endm
+
+	.macro	lasx_restore_all thread tmp0 tmp1
+	lasx_restore_data	\thread, \tmp0
+	fpu_restore_cc		\thread, \tmp0, \tmp1
+	fpu_restore_csr		\thread, \tmp0
+	.endm
+
+	.macro	lasx_save_upper xd base tmp off
+	/* Nothing */
+	.endm
+
+	.macro	lasx_save_all_upper thread base tmp
+	/* Nothing */
+	.endm
+
+	.macro	lasx_restore_upper xd base tmp0 tmp1 off
+	vld		\tmp0, \base, (\off+16)
+	xvpermi.q 	\xd,   \tmp1, 0x2
+	.endm
+
+	.macro	lasx_restore_all_upper thread base tmp
+	li.w		\tmp, THREAD_FPR0
+	PTR_ADD		\base, \thread, \tmp
+	/* Save $vr31 ($xr31 lower bits) with xvpickve2gr */
+	xvpickve2gr.d	$r17, $xr31, 0
+	xvpickve2gr.d	$r18, $xr31, 1
+	lasx_restore_upper $xr0, \base, $vr31, $xr31, (THREAD_FPR0-THREAD_FPR0)
+	lasx_restore_upper $xr1, \base, $vr31, $xr31, (THREAD_FPR1-THREAD_FPR0)
+	lasx_restore_upper $xr2, \base, $vr31, $xr31, (THREAD_FPR2-THREAD_FPR0)
+	lasx_restore_upper $xr3, \base, $vr31, $xr31, (THREAD_FPR3-THREAD_FPR0)
+	lasx_restore_upper $xr4, \base, $vr31, $xr31, (THREAD_FPR4-THREAD_FPR0)
+	lasx_restore_upper $xr5, \base, $vr31, $xr31, (THREAD_FPR5-THREAD_FPR0)
+	lasx_restore_upper $xr6, \base, $vr31, $xr31, (THREAD_FPR6-THREAD_FPR0)
+	lasx_restore_upper $xr7, \base, $vr31, $xr31, (THREAD_FPR7-THREAD_FPR0)
+	lasx_restore_upper $xr8, \base, $vr31, $xr31, (THREAD_FPR8-THREAD_FPR0)
+	lasx_restore_upper $xr9, \base, $vr31, $xr31, (THREAD_FPR9-THREAD_FPR0)
+	lasx_restore_upper $xr10, \base, $vr31, $xr31, (THREAD_FPR10-THREAD_FPR0)
+	lasx_restore_upper $xr11, \base, $vr31, $xr31, (THREAD_FPR11-THREAD_FPR0)
+	lasx_restore_upper $xr12, \base, $vr31, $xr31, (THREAD_FPR12-THREAD_FPR0)
+	lasx_restore_upper $xr13, \base, $vr31, $xr31, (THREAD_FPR13-THREAD_FPR0)
+	lasx_restore_upper $xr14, \base, $vr31, $xr31, (THREAD_FPR14-THREAD_FPR0)
+	lasx_restore_upper $xr15, \base, $vr31, $xr31, (THREAD_FPR15-THREAD_FPR0)
+	lasx_restore_upper $xr16, \base, $vr31, $xr31, (THREAD_FPR16-THREAD_FPR0)
+	lasx_restore_upper $xr17, \base, $vr31, $xr31, (THREAD_FPR17-THREAD_FPR0)
+	lasx_restore_upper $xr18, \base, $vr31, $xr31, (THREAD_FPR18-THREAD_FPR0)
+	lasx_restore_upper $xr19, \base, $vr31, $xr31, (THREAD_FPR19-THREAD_FPR0)
+	lasx_restore_upper $xr20, \base, $vr31, $xr31, (THREAD_FPR20-THREAD_FPR0)
+	lasx_restore_upper $xr21, \base, $vr31, $xr31, (THREAD_FPR21-THREAD_FPR0)
+	lasx_restore_upper $xr22, \base, $vr31, $xr31, (THREAD_FPR22-THREAD_FPR0)
+	lasx_restore_upper $xr23, \base, $vr31, $xr31, (THREAD_FPR23-THREAD_FPR0)
+	lasx_restore_upper $xr24, \base, $vr31, $xr31, (THREAD_FPR24-THREAD_FPR0)
+	lasx_restore_upper $xr25, \base, $vr31, $xr31, (THREAD_FPR25-THREAD_FPR0)
+	lasx_restore_upper $xr26, \base, $vr31, $xr31, (THREAD_FPR26-THREAD_FPR0)
+	lasx_restore_upper $xr27, \base, $vr31, $xr31, (THREAD_FPR27-THREAD_FPR0)
+	lasx_restore_upper $xr28, \base, $vr31, $xr31, (THREAD_FPR28-THREAD_FPR0)
+	lasx_restore_upper $xr29, \base, $vr31, $xr31, (THREAD_FPR29-THREAD_FPR0)
+	lasx_restore_upper $xr30, \base, $vr31, $xr31, (THREAD_FPR30-THREAD_FPR0)
+	lasx_restore_upper $xr31, \base, $vr31, $xr31, (THREAD_FPR31-THREAD_FPR0)
+	/* Restore $vr31 ($xr31 lower bits) with xvinsgr2vr */
+	xvinsgr2vr.d	$xr31, $r17, 0
+	xvinsgr2vr.d	$xr31, $r18, 1
+	.endm
+
+	.macro	lasx_init_upper xd tmp
+	xvinsgr2vr.d	\xd, \tmp, 2
+	xvinsgr2vr.d	\xd, \tmp, 3
+	.endm
+
+	.macro	lasx_init_all_upper tmp
+	not		\tmp, zero
+	lasx_init_upper	$xr0 \tmp
+	lasx_init_upper	$xr1 \tmp
+	lasx_init_upper	$xr2 \tmp
+	lasx_init_upper	$xr3 \tmp
+	lasx_init_upper	$xr4 \tmp
+	lasx_init_upper	$xr5 \tmp
+	lasx_init_upper	$xr6 \tmp
+	lasx_init_upper	$xr7 \tmp
+	lasx_init_upper	$xr8 \tmp
+	lasx_init_upper	$xr9 \tmp
+	lasx_init_upper	$xr10 \tmp
+	lasx_init_upper	$xr11 \tmp
+	lasx_init_upper	$xr12 \tmp
+	lasx_init_upper	$xr13 \tmp
+	lasx_init_upper	$xr14 \tmp
+	lasx_init_upper	$xr15 \tmp
+	lasx_init_upper	$xr16 \tmp
+	lasx_init_upper	$xr17 \tmp
+	lasx_init_upper	$xr18 \tmp
+	lasx_init_upper	$xr19 \tmp
+	lasx_init_upper	$xr20 \tmp
+	lasx_init_upper	$xr21 \tmp
+	lasx_init_upper	$xr22 \tmp
+	lasx_init_upper	$xr23 \tmp
+	lasx_init_upper	$xr24 \tmp
+	lasx_init_upper	$xr25 \tmp
+	lasx_init_upper	$xr26 \tmp
+	lasx_init_upper	$xr27 \tmp
+	lasx_init_upper	$xr28 \tmp
+	lasx_init_upper	$xr29 \tmp
+	lasx_init_upper	$xr30 \tmp
+	lasx_init_upper	$xr31 \tmp
+	.endm
+
 .macro not dst src
 	nor	\dst, \src, zero
 .endm

arch/loongarch/include/asm/barrier.h

···
 #ifndef __ASM_BARRIER_H
 #define __ASM_BARRIER_H
 
-#define __sync()	__asm__ __volatile__("dbar 0" : : : "memory")
+/*
+ * Hint encoding:
+ *
+ * Bit4: ordering or completion (0: completion, 1: ordering)
+ * Bit3: barrier for previous read (0: true, 1: false)
+ * Bit2: barrier for previous write (0: true, 1: false)
+ * Bit1: barrier for succeeding read (0: true, 1: false)
+ * Bit0: barrier for succeeding write (0: true, 1: false)
+ *
+ * Hint 0x700: barrier for "read after read" from the same address
+ */
 
-#define fast_wmb()	__sync()
-#define fast_rmb()	__sync()
-#define fast_mb()	__sync()
-#define fast_iob()	__sync()
-#define wbflush()	__sync()
+#define DBAR(hint) __asm__ __volatile__("dbar %0 " : : "I"(hint) : "memory")
 
-#define wmb()		fast_wmb()
-#define rmb()		fast_rmb()
-#define mb()		fast_mb()
-#define iob()		fast_iob()
+#define crwrw		0b00000
+#define cr_r_		0b00101
+#define c_w_w		0b01010
 
-#define __smp_mb()	__asm__ __volatile__("dbar 0" : : : "memory")
-#define __smp_rmb()	__asm__ __volatile__("dbar 0" : : : "memory")
-#define __smp_wmb()	__asm__ __volatile__("dbar 0" : : : "memory")
+#define orwrw		0b10000
+#define or_r_		0b10101
+#define o_w_w		0b11010
+
+#define orw_w		0b10010
+#define or_rw		0b10100
+
+#define c_sync()	DBAR(crwrw)
+#define c_rsync()	DBAR(cr_r_)
+#define c_wsync()	DBAR(c_w_w)
+
+#define o_sync()	DBAR(orwrw)
+#define o_rsync()	DBAR(or_r_)
+#define o_wsync()	DBAR(o_w_w)
+
+#define ldacq_mb()	DBAR(or_rw)
+#define strel_mb()	DBAR(orw_w)
+
+#define mb()		c_sync()
+#define rmb()		c_rsync()
+#define wmb()		c_wsync()
+#define iob()		c_sync()
+#define wbflush()	c_sync()
+
+#define __smp_mb()	o_sync()
+#define __smp_rmb()	o_rsync()
+#define __smp_wmb()	o_wsync()
 
 #ifdef CONFIG_SMP
-#define __WEAK_LLSC_MB		"	dbar 0  \n"
+#define __WEAK_LLSC_MB		"	dbar 0x700	\n"
 #else
-#define __WEAK_LLSC_MB		"		\n"
+#define __WEAK_LLSC_MB		"			\n"
 #endif
 
 #define __smp_mb__before_atomic()	barrier()
···
 	return mask;
 }
 
-#define __smp_load_acquire(p)							\
-({										\
-	union { typeof(*p) __val; char __c[1]; } __u;				\
-	unsigned long __tmp = 0;							\
-	compiletime_assert_atomic_type(*p);					\
-	switch (sizeof(*p)) {							\
-	case 1:									\
-		*(__u8 *)__u.__c = *(volatile __u8 *)p;				\
-		__smp_mb();							\
-		break;								\
-	case 2:									\
-		*(__u16 *)__u.__c = *(volatile __u16 *)p;			\
-		__smp_mb();							\
-		break;								\
-	case 4:									\
-		__asm__ __volatile__(						\
-		"amor_db.w %[val], %[tmp], %[mem]	\n"				\
-		: [val] "=&r" (*(__u32 *)__u.__c)				\
-		: [mem] "ZB" (*(u32 *) p), [tmp] "r" (__tmp)			\
-		: "memory");							\
-		break;								\
-	case 8:									\
-		__asm__ __volatile__(						\
-		"amor_db.d %[val], %[tmp], %[mem]	\n"				\
-		: [val] "=&r" (*(__u64 *)__u.__c)				\
-		: [mem] "ZB" (*(u64 *) p), [tmp] "r" (__tmp)			\
-		: "memory");							\
-		break;								\
-	}									\
-	(typeof(*p))__u.__val;								\
+#define __smp_load_acquire(p)				\
+({							\
+	typeof(*p) ___p1 = READ_ONCE(*p);		\
+	compiletime_assert_atomic_type(*p);		\
+	ldacq_mb();					\
+	___p1;						\
 })
 
-#define __smp_store_release(p, v)						\
-do {										\
-	union { typeof(*p) __val; char __c[1]; } __u =				\
-		{ .__val = (__force typeof(*p)) (v) };				\
-	unsigned long __tmp;							\
-	compiletime_assert_atomic_type(*p);					\
-	switch (sizeof(*p)) {							\
-	case 1:									\
-		__smp_mb();							\
-		*(volatile __u8 *)p = *(__u8 *)__u.__c;				\
-		break;								\
-	case 2:									\
-		__smp_mb();							\
-		*(volatile __u16 *)p = *(__u16 *)__u.__c;			\
-		break;								\
-	case 4:									\
-		__asm__ __volatile__(						\
-		"amswap_db.w %[tmp], %[val], %[mem]	\n"			\
-		: [mem] "+ZB" (*(u32 *)p), [tmp] "=&r" (__tmp)			\
-		: [val] "r" (*(__u32 *)__u.__c)					\
-		: );								\
-		break;								\
-	case 8:									\
-		__asm__ __volatile__(						\
-		"amswap_db.d %[tmp], %[val], %[mem]	\n"			\
-		: [mem] "+ZB" (*(u64 *)p), [tmp] "=&r" (__tmp)			\
-		: [val] "r" (*(__u64 *)__u.__c)					\
-		: );								\
-		break;								\
-	}									\
+#define __smp_store_release(p, v)			\
+do {							\
+	compiletime_assert_atomic_type(*p);		\
+	strel_mb();					\
+	WRITE_ONCE(*p, v);				\
 } while (0)
 
 #define __smp_store_mb(p, v)							\

arch/loongarch/include/asm/cpu-features.h

···
 #define cpu_has_eiodecode	cpu_opt(LOONGARCH_CPU_EIODECODE)
 #define cpu_has_guestid		cpu_opt(LOONGARCH_CPU_GUESTID)
 #define cpu_has_hypervisor	cpu_opt(LOONGARCH_CPU_HYPERVISOR)
-
+#define cpu_has_ptw		cpu_opt(LOONGARCH_CPU_PTW)
 
 #endif /* __ASM_CPU_FEATURES_H */

arch/loongarch/include/asm/cpu-info.h

···
 	struct cache_desc	cache_leaves[CACHE_LEAVES_MAX];
 	int			core;   /* physical core number in package */
 	int			package;/* physical package number */
+	int			global_id; /* physical global thread number */
 	int			vabits; /* Virtual Address size in bits */
 	int			pabits; /* Physical Address size in bits */
 	unsigned int		ksave_mask; /* Usable KSave mask. */

arch/loongarch/include/asm/cpu.h

···
 #define CPU_FEATURE_EIODECODE		23	/* CPU has EXTIOI interrupt pin decode mode */
 #define CPU_FEATURE_GUESTID		24	/* CPU has GuestID feature */
 #define CPU_FEATURE_HYPERVISOR		25	/* CPU has hypervisor (running in VM) */
+#define CPU_FEATURE_PTW			26	/* CPU has hardware page table walker */
 
 #define LOONGARCH_CPU_CPUCFG		BIT_ULL(CPU_FEATURE_CPUCFG)
 #define LOONGARCH_CPU_LAM		BIT_ULL(CPU_FEATURE_LAM)
···
 #define LOONGARCH_CPU_EIODECODE		BIT_ULL(CPU_FEATURE_EIODECODE)
 #define LOONGARCH_CPU_GUESTID		BIT_ULL(CPU_FEATURE_GUESTID)
 #define LOONGARCH_CPU_HYPERVISOR	BIT_ULL(CPU_FEATURE_HYPERVISOR)
+#define LOONGARCH_CPU_PTW		BIT_ULL(CPU_FEATURE_PTW)
 
 #endif /* _ASM_CPU_H */

arch/loongarch/include/asm/fpregdef.h

···
 #define fs6	$f30
 #define fs7	$f31
 
+#ifndef CONFIG_AS_HAS_FCSR_CLASS
 /*
  * Current binutils expects *GPRs* at FCSR position for the FCSR
  * operation instructions, so define aliases for those used.
···
 #define fcsr1	$r1
 #define fcsr2	$r2
 #define fcsr3	$r3
+#else
+#define fcsr0	$fcsr0
+#define fcsr1	$fcsr1
+#define fcsr2	$fcsr2
+#define fcsr3	$fcsr3
+#endif
 
 #endif /* _ASM_FPREGDEF_H */

arch/loongarch/include/asm/fpu.h

···
 extern void _save_fp(struct loongarch_fpu *);
 extern void _restore_fp(struct loongarch_fpu *);
 
+extern void _save_lsx(struct loongarch_fpu *fpu);
+extern void _restore_lsx(struct loongarch_fpu *fpu);
+extern void _init_lsx_upper(void);
+extern void _restore_lsx_upper(struct loongarch_fpu *fpu);
+
+extern void _save_lasx(struct loongarch_fpu *fpu);
+extern void _restore_lasx(struct loongarch_fpu *fpu);
+extern void _init_lasx_upper(void);
+extern void _restore_lasx_upper(struct loongarch_fpu *fpu);
+
+static inline void enable_lsx(void);
+static inline void disable_lsx(void);
+static inline void save_lsx(struct task_struct *t);
+static inline void restore_lsx(struct task_struct *t);
+
+static inline void enable_lasx(void);
+static inline void disable_lasx(void);
+static inline void save_lasx(struct task_struct *t);
+static inline void restore_lasx(struct task_struct *t);
+
 /*
  * Mask the FCSR Cause bits according to the Enable bits, observing
  * that Unimplemented is always enabled.
···
 {
 	return (csr_read32(LOONGARCH_CSR_EUEN) & CSR_EUEN_FPEN) ?
 		1 : 0;
+}
+
+static inline int is_lsx_enabled(void)
+{
+	if (!cpu_has_lsx)
+		return 0;
+
+	return (csr_read32(LOONGARCH_CSR_EUEN) & CSR_EUEN_LSXEN) ?
+		1 : 0;
+}
+
+static inline int is_lasx_enabled(void)
+{
+	if (!cpu_has_lasx)
+		return 0;
+
+	return (csr_read32(LOONGARCH_CSR_EUEN) & CSR_EUEN_LASXEN) ?
+		1 : 0;
+}
+
+static inline int is_simd_enabled(void)
+{
+	return is_lsx_enabled() | is_lasx_enabled();
 }
 
 #define enable_fpu()		set_csr_euen(CSR_EUEN_FPEN)
···
 static inline void lose_fpu_inatomic(int save, struct task_struct *tsk)
 {
 	if (is_fpu_owner()) {
-		if (save)
-			_save_fp(&tsk->thread.fpu);
-		disable_fpu();
+		if (!is_simd_enabled()) {
+			if (save)
+				_save_fp(&tsk->thread.fpu);
+			disable_fpu();
+		} else {
+			if (save) {
+				if (!is_lasx_enabled())
+					save_lsx(tsk);
+				else
+					save_lasx(tsk);
+			}
+			disable_fpu();
+			disable_lsx();
+			disable_lasx();
+			clear_tsk_thread_flag(tsk, TIF_USEDSIMD);
+		}
 		clear_tsk_thread_flag(tsk, TIF_USEDFPU);
 	}
 	KSTK_EUEN(tsk) &= ~(CSR_EUEN_FPEN | CSR_EUEN_LSXEN | CSR_EUEN_LASXEN);
···
 	}
 
 	return tsk->thread.fpu.fpr;
+}
+
+static inline int is_simd_owner(void)
+{
+	return test_thread_flag(TIF_USEDSIMD);
+}
+
+#ifdef CONFIG_CPU_HAS_LSX
+
+static inline void enable_lsx(void)
+{
+	if (cpu_has_lsx)
+		csr_xchg32(CSR_EUEN_LSXEN, CSR_EUEN_LSXEN, LOONGARCH_CSR_EUEN);
+}
+
+static inline void disable_lsx(void)
+{
+	if (cpu_has_lsx)
+		csr_xchg32(0, CSR_EUEN_LSXEN, LOONGARCH_CSR_EUEN);
+}
+
+static inline void save_lsx(struct task_struct *t)
+{
+	if (cpu_has_lsx)
+		_save_lsx(&t->thread.fpu);
+}
+
+static inline void restore_lsx(struct task_struct *t)
+{
+	if (cpu_has_lsx)
+		_restore_lsx(&t->thread.fpu);
+}
+
+static inline void init_lsx_upper(void)
+{
+	/*
+	 * Check cpu_has_lsx only if it's a constant. This will allow the
+	 * compiler to optimise out code for CPUs without LSX without adding
+	 * an extra redundant check for CPUs with LSX.
+	 */
+	if (__builtin_constant_p(cpu_has_lsx) && !cpu_has_lsx)
+		return;
+
+	_init_lsx_upper();
+}
+
+static inline void restore_lsx_upper(struct task_struct *t)
+{
+	if (cpu_has_lsx)
+		_restore_lsx_upper(&t->thread.fpu);
+}
+
+#else
+static inline void enable_lsx(void) {}
+static inline void disable_lsx(void) {}
+static inline void save_lsx(struct task_struct *t) {}
+static inline void restore_lsx(struct task_struct *t) {}
+static inline void init_lsx_upper(void) {}
+static inline void restore_lsx_upper(struct task_struct *t) {}
+#endif
+
+#ifdef CONFIG_CPU_HAS_LASX
+
+static inline void enable_lasx(void)
+{
+
+	if (cpu_has_lasx)
+		csr_xchg32(CSR_EUEN_LASXEN, CSR_EUEN_LASXEN, LOONGARCH_CSR_EUEN);
+}
+
+static inline void disable_lasx(void)
+{
+	if (cpu_has_lasx)
+		csr_xchg32(0, CSR_EUEN_LASXEN, LOONGARCH_CSR_EUEN);
+}
+
+static inline void save_lasx(struct task_struct *t)
+{
+	if (cpu_has_lasx)
+		_save_lasx(&t->thread.fpu);
+}
+
+static inline void restore_lasx(struct task_struct *t)
+{
+	if (cpu_has_lasx)
+		_restore_lasx(&t->thread.fpu);
+}
+
+static inline void init_lasx_upper(void)
+{
+	if (cpu_has_lasx)
+		_init_lasx_upper();
+}
+
+static inline void restore_lasx_upper(struct task_struct *t)
+{
+	if (cpu_has_lasx)
+		_restore_lasx_upper(&t->thread.fpu);
+}
+
+#else
+static inline void enable_lasx(void) {}
+static inline void disable_lasx(void) {}
+static inline void save_lasx(struct task_struct *t) {}
+static inline void restore_lasx(struct task_struct *t) {}
+static inline void init_lasx_upper(void) {}
+static inline void restore_lasx_upper(struct task_struct *t) {}
+#endif
+
+static inline int thread_lsx_context_live(void)
+{
+	if (__builtin_constant_p(cpu_has_lsx) && !cpu_has_lsx)
+		return 0;
+
+	return test_thread_flag(TIF_LSX_CTX_LIVE);
+}
+
+static inline int thread_lasx_context_live(void)
+{
+	if (__builtin_constant_p(cpu_has_lasx) && !cpu_has_lasx)
+		return 0;
+
+	return test_thread_flag(TIF_LASX_CTX_LIVE);
 }
 
 #endif /* _ASM_FPU_H */

arch/loongarch/include/asm/gpr-num.h

···
 	.equ	.L__gpr_num_$r\num, \num
 	.endr
 
+	/* ABI names of registers */
+	.equ	.L__gpr_num_$ra, 1
+	.equ	.L__gpr_num_$tp, 2
+	.equ	.L__gpr_num_$sp, 3
+	.irp	num,0,1,2,3,4,5,6,7
+	.equ	.L__gpr_num_$a\num, 4 + \num
+	.endr
+	.irp	num,0,1,2,3,4,5,6,7,8
+	.equ	.L__gpr_num_$t\num, 12 + \num
+	.endr
+	.equ	.L__gpr_num_$s9, 22
+	.equ	.L__gpr_num_$fp, 22
+	.irp	num,0,1,2,3,4,5,6,7,8
+	.equ	.L__gpr_num_$s\num, 23 + \num
+	.endr
+
 #else /* __ASSEMBLY__ */
 
 #define __DEFINE_ASM_GPR_NUMS					\
 "	.equ	.L__gpr_num_zero, 0\n"				\
 "	.irp	num,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31\n" \
 "	.equ	.L__gpr_num_$r\\num, \\num\n"			\
+"	.endr\n"						\
+"	.equ	.L__gpr_num_$ra, 1\n"				\
+"	.equ	.L__gpr_num_$tp, 2\n"				\
+"	.equ	.L__gpr_num_$sp, 3\n"				\
+"	.irp	num,0,1,2,3,4,5,6,7\n"				\
+"	.equ	.L__gpr_num_$a\\num, 4 + \\num\n"		\
+"	.endr\n"						\
+"	.irp	num,0,1,2,3,4,5,6,7,8\n"			\
+"	.equ	.L__gpr_num_$t\\num, 12 + \\num\n"		\
+"	.endr\n"						\
+"	.equ	.L__gpr_num_$s9, 22\n"				\
+"	.equ	.L__gpr_num_$fp, 22\n"				\
+"	.irp	num,0,1,2,3,4,5,6,7,8\n"			\
+"	.equ	.L__gpr_num_$s\\num, 23 + \\num\n"		\
 "	.endr\n"						\
 
 #endif /* __ASSEMBLY__ */

arch/loongarch/include/asm/inst.h

···
 #ifndef _ASM_INST_H
 #define _ASM_INST_H
 
+#include <linux/bitops.h>
 #include <linux/types.h>
 #include <asm/asm.h>
 #include <asm/ptrace.h>
···
 #define ADDR_IMMMASK_LU52ID	0xFFF0000000000000
 #define ADDR_IMMMASK_LU32ID	0x000FFFFF00000000
 #define ADDR_IMMMASK_LU12IW	0x00000000FFFFF000
+#define ADDR_IMMMASK_ORI	0x0000000000000FFF
 #define ADDR_IMMMASK_ADDU16ID	0x00000000FFFF0000
 
 #define ADDR_IMMSHIFT_LU52ID	52
+#define ADDR_IMMSBIDX_LU52ID	11
 #define ADDR_IMMSHIFT_LU32ID	32
+#define ADDR_IMMSBIDX_LU32ID	19
 #define ADDR_IMMSHIFT_LU12IW	12
+#define ADDR_IMMSBIDX_LU12IW	19
+#define ADDR_IMMSHIFT_ORI	0
+#define ADDR_IMMSBIDX_ORI	63
 #define ADDR_IMMSHIFT_ADDU16ID	16
+#define ADDR_IMMSBIDX_ADDU16ID	15
 
-#define ADDR_IMM(addr, INSN)	((addr & ADDR_IMMMASK_##INSN) >> ADDR_IMMSHIFT_##INSN)
+#define ADDR_IMM(addr, INSN)	\
+	(sign_extend64(((addr & ADDR_IMMMASK_##INSN) >> ADDR_IMMSHIFT_##INSN), ADDR_IMMSBIDX_##INSN))
 
 enum reg0i15_op {
 	break_op	= 0x54,
···
 	amord_op	= 0x70c7,
 	amxorw_op	= 0x70c8,
 	amxord_op	= 0x70c9,
+	ammaxw_op	= 0x70ca,
+	ammaxd_op	= 0x70cb,
+	amminw_op	= 0x70cc,
+	ammind_op	= 0x70cd,
+	ammaxwu_op	= 0x70ce,
+	ammaxdu_op	= 0x70cf,
+	amminwu_op	= 0x70d0,
+	ammindu_op	= 0x70d1,
+	amswapdbw_op	= 0x70d2,
+	amswapdbd_op	= 0x70d3,
+	amadddbw_op	= 0x70d4,
+	amadddbd_op	= 0x70d5,
+	amanddbw_op	= 0x70d6,
+	amanddbd_op	= 0x70d7,
+	amordbw_op	= 0x70d8,
+	amordbd_op	= 0x70d9,
+	amxordbw_op	= 0x70da,
+	amxordbd_op	= 0x70db,
+	ammaxdbw_op	= 0x70dc,
+	ammaxdbd_op	= 0x70dd,
+	ammindbw_op	= 0x70de,
+	ammindbd_op	= 0x70df,
+	ammaxdbwu_op	= 0x70e0,
+	ammaxdbdu_op	= 0x70e1,
+	ammindbwu_op	= 0x70e2,
+	ammindbdu_op	= 0x70e3,
 	fldgts_op	= 0x70e8,
 	fldgtd_op	= 0x70e9,
 	fldles_op	= 0x70ea,
···
 void simu_pc(struct pt_regs *regs, union loongarch_instruction insn);
 void simu_branch(struct pt_regs *regs, union loongarch_instruction insn);
 
+bool insns_not_supported(union loongarch_instruction insn);
+bool insns_need_simulation(union loongarch_instruction insn);
+void arch_simulate_insn(union loongarch_instruction insn, struct pt_regs *regs);
+
 int larch_insn_read(void *addr, u32 *insnp);
 int larch_insn_write(void *addr, u32 insn);
 int larch_insn_patch_text(void *addr, u32 insn);
···
 u32 larch_insn_gen_b(unsigned long pc, unsigned long dest);
 u32 larch_insn_gen_bl(unsigned long pc, unsigned long dest);
 
+u32 larch_insn_gen_break(int imm);
+
 u32 larch_insn_gen_or(enum loongarch_gpr rd, enum loongarch_gpr rj, enum loongarch_gpr rk);
 u32 larch_insn_gen_move(enum loongarch_gpr rd, enum loongarch_gpr rj);
 
 u32 larch_insn_gen_lu12iw(enum loongarch_gpr rd, int imm);
 u32 larch_insn_gen_lu32id(enum loongarch_gpr rd, int imm);
 u32 larch_insn_gen_lu52id(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm);
-u32 larch_insn_gen_jirl(enum loongarch_gpr rd, enum loongarch_gpr rj, unsigned long pc, unsigned long dest);
+u32 larch_insn_gen_jirl(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm);
 
 static inline bool signed_imm_check(long val, unsigned int bit)
 {
···
 {
 	return val < (1UL << bit);
 }
+
+#define DEF_EMIT_REG0I15_FORMAT(NAME, OP)				\
+static inline void emit_##NAME(union loongarch_instruction *insn,	\
+			       int imm)					\
+{									\
+	insn->reg0i15_format.opcode = OP;				\
+	insn->reg0i15_format.immediate = imm;				\
+}
+
+DEF_EMIT_REG0I15_FORMAT(break, break_op)
 
 #define DEF_EMIT_REG0I26_FORMAT(NAME, OP)				\
 static inline void emit_##NAME(union loongarch_instruction *insn,	\

arch/loongarch/include/asm/io.h

···
 #define ioremap_cache(offset, size)	\
 	ioremap_prot((offset), (size), pgprot_val(PAGE_KERNEL))
 
-#define mmiowb() asm volatile ("dbar 0" ::: "memory")
+#define mmiowb() wmb()
 
 /*
  * String version of I/O memory access operations.

arch/loongarch/include/asm/jump_label.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ *
+ * Based on arch/arm64/include/asm/jump_label.h
+ */
+#ifndef __ASM_JUMP_LABEL_H
+#define __ASM_JUMP_LABEL_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+
+#define JUMP_LABEL_NOP_SIZE	4
+
+#define JUMP_TABLE_ENTRY				\
+	 ".pushsection	__jump_table, \"aw\"	\n\t"	\
+	 ".align	3			\n\t"	\
+	 ".long		1b - ., %l[l_yes] - .	\n\t"	\
+	 ".quad		%0 - .			\n\t"	\
+	 ".popsection				\n\t"
+
+static __always_inline bool arch_static_branch(struct static_key * const key, const bool branch)
+{
+	asm_volatile_goto(
+		"1:	nop			\n\t"
+		JUMP_TABLE_ENTRY
+		:  :  "i"(&((char *)key)[branch]) :  : l_yes);
+
+	return false;
+
+l_yes:
+	return true;
+}
+
+static __always_inline bool arch_static_branch_jump(struct static_key * const key, const bool branch)
+{
+	asm_volatile_goto(
+		"1:	b	%l[l_yes]	\n\t"
+		JUMP_TABLE_ENTRY
+		:  :  "i"(&((char *)key)[branch]) :  : l_yes);
+
+	return false;
+
+l_yes:
+	return true;
+}
+
+#endif  /* __ASSEMBLY__ */
+#endif	/* __ASM_JUMP_LABEL_H */

arch/loongarch/include/asm/kdebug.h

···
 	DIE_FP,
 	DIE_SIMD,
 	DIE_TRAP,
-	DIE_PAGE_FAULT,
-	DIE_BREAK,
-	DIE_SSTEPBP,
-	DIE_UPROBE,
-	DIE_UPROBE_XOL,
 };
 
 #endif /* _ASM_LOONGARCH_KDEBUG_H */

arch/loongarch/include/asm/kprobes.h

···
 
 #define kretprobe_blacklist_size	0
 
-typedef union loongarch_instruction kprobe_opcode_t;
+typedef u32 kprobe_opcode_t;
 
 /* Architecture specific copy of original instruction */
 struct arch_specific_insn {
···
 bool kprobe_fault_handler(struct pt_regs *regs, int trapnr);
 bool kprobe_breakpoint_handler(struct pt_regs *regs);
 bool kprobe_singlestep_handler(struct pt_regs *regs);
-
-void __kretprobe_trampoline(void);
-void *trampoline_probe_handler(struct pt_regs *regs);
 
 #else /* !CONFIG_KPROBES */
 

arch/loongarch/include/asm/loongarch.h

···
 #undef _IFC_REG
 
 /* CPUCFG */
-static inline u32 read_cpucfg(u32 reg)
-{
-	return __cpucfg(reg);
-}
+#define read_cpucfg(reg) __cpucfg(reg)
 
 #endif /* !__ASSEMBLY__ */
 
···
 #define  CPUCFG2_MIPSBT			BIT(20)
 #define  CPUCFG2_LSPW			BIT(21)
 #define  CPUCFG2_LAM			BIT(22)
+#define  CPUCFG2_PTW			BIT(24)
 
 #define LOONGARCH_CPUCFG3		0x3
 #define  CPUCFG3_CCDMA			BIT(0)
···
 #ifndef __ASSEMBLY__
 
 /* CSR */
-static __always_inline u32 csr_read32(u32 reg)
-{
-	return __csrrd_w(reg);
-}
-
-static __always_inline u64 csr_read64(u32 reg)
-{
-	return __csrrd_d(reg);
-}
-
-static __always_inline void csr_write32(u32 val, u32 reg)
-{
-	__csrwr_w(val, reg);
-}
-
-static __always_inline void csr_write64(u64 val, u32 reg)
-{
-	__csrwr_d(val, reg);
-}
-
-static __always_inline u32 csr_xchg32(u32 val, u32 mask, u32 reg)
-{
-	return __csrxchg_w(val, mask, reg);
-}
-
-static __always_inline u64 csr_xchg64(u64 val, u64 mask, u32 reg)
-{
-	return __csrxchg_d(val, mask, reg);
-}
+#define csr_read32(reg) __csrrd_w(reg)
+#define csr_read64(reg) __csrrd_d(reg)
+#define csr_write32(val, reg) __csrwr_w(val, reg)
+#define csr_write64(val, reg) __csrwr_d(val, reg)
+#define csr_xchg32(val, mask, reg) __csrxchg_w(val, mask, reg)
+#define csr_xchg64(val, mask, reg) __csrxchg_d(val, mask, reg)
 
 /* IOCSR */
-static __always_inline u32 iocsr_read32(u32 reg)
-{
-	return __iocsrrd_w(reg);
-}
-
-static __always_inline u64 iocsr_read64(u32 reg)
-{
-	return __iocsrrd_d(reg);
-}
-
-static __always_inline void iocsr_write32(u32 val, u32 reg)
-{
-	__iocsrwr_w(val, reg);
-}
-
-static __always_inline void iocsr_write64(u64 val, u32 reg)
-{
-	__iocsrwr_d(val, reg);
-}
+#define iocsr_read32(reg) __iocsrrd_w(reg)
+#define iocsr_read64(reg) __iocsrrd_d(reg)
+#define iocsr_write32(val, reg) __iocsrwr_w(val, reg)
+#define iocsr_write64(val, reg) __iocsrwr_d(val, reg)
 
 #endif /* !__ASSEMBLY__ */
 
···
 #define  CSR_PWCTL0_PTBASE		(_ULCAST_(0x1f) << CSR_PWCTL0_PTBASE_SHIFT)
 
 #define LOONGARCH_CSR_PWCTL1		0x1d	/* PWCtl1 */
+#define  CSR_PWCTL1_PTW_SHIFT		24
+#define  CSR_PWCTL1_PTW_WIDTH		1
+#define  CSR_PWCTL1_PTW			(_ULCAST_(0x1) << CSR_PWCTL1_PTW_SHIFT)
 #define  CSR_PWCTL1_DIR3WIDTH_SHIFT	18
 #define  CSR_PWCTL1_DIR3WIDTH_WIDTH	5
 #define  CSR_PWCTL1_DIR3WIDTH		(_ULCAST_(0x1f) << CSR_PWCTL1_DIR3WIDTH_SHIFT)
···
 #define EXCCODE_INT_START	64
 #define EXCCODE_INT_END		(EXCCODE_INT_START + EXCCODE_INT_NUM - 1)
 
-/* FPU register names */
+/* FPU Status Register Names */
+#ifndef CONFIG_AS_HAS_FCSR_CLASS
 #define LOONGARCH_FCSR0	$r0
 #define LOONGARCH_FCSR1	$r1
 #define LOONGARCH_FCSR2	$r2
 #define LOONGARCH_FCSR3	$r3
+#else
+#define LOONGARCH_FCSR0	$fcsr0
+#define LOONGARCH_FCSR1	$fcsr1
+#define LOONGARCH_FCSR2	$fcsr2
+#define LOONGARCH_FCSR3	$fcsr3
+#endif
 
 /* FPU Status Register Values */
 #define FPU_CSR_RSVD	0xe0e0fce0

arch/loongarch/include/asm/module.h

···
 	lu12iw = larch_insn_gen_lu12iw(LOONGARCH_GPR_T1, ADDR_IMM(val, LU12IW));
 	lu32id = larch_insn_gen_lu32id(LOONGARCH_GPR_T1, ADDR_IMM(val, LU32ID));
 	lu52id = larch_insn_gen_lu52id(LOONGARCH_GPR_T1, LOONGARCH_GPR_T1, ADDR_IMM(val, LU52ID));
-	jirl = larch_insn_gen_jirl(0, LOONGARCH_GPR_T1, 0, (val & 0xfff));
+	jirl = larch_insn_gen_jirl(0, LOONGARCH_GPR_T1, ADDR_IMM(val, ORI));
 
 	return (struct plt_entry) { lu12iw, lu32id, lu52id, jirl };
 }

arch/loongarch/include/asm/page.h

···
 #define __va(x)		((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
 
 #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
+#define sym_to_pfn(x)		__phys_to_pfn(__pa_symbol(x))
 
 #define virt_to_pfn(kaddr)	PFN_DOWN(PHYSADDR(kaddr))
 #define virt_to_page(kaddr)	pfn_to_page(virt_to_pfn(kaddr))

arch/loongarch/include/asm/percpu.h

···
  * loaded. Tell the compiler this fact when using explicit relocs.
  */
 #if defined(MODULE) && defined(CONFIG_AS_HAS_EXPLICIT_RELOCS)
-#define PER_CPU_ATTRIBUTES    __attribute__((model("extreme")))
+# if __has_attribute(model)
+#  define PER_CPU_ATTRIBUTES __attribute__((model("extreme")))
+# else
+#  error compiler support for the model attribute is necessary when a recent assembler is used
+# endif
 #endif
 
 /* Use r21 for fast access */

arch/loongarch/include/asm/pgtable.h

···
  */
 static inline int pte_write(pte_t pte)	{ return pte_val(pte) & _PAGE_WRITE; }
 static inline int pte_young(pte_t pte)	{ return pte_val(pte) & _PAGE_ACCESSED; }
-static inline int pte_dirty(pte_t pte)	{ return pte_val(pte) & _PAGE_MODIFIED; }
+static inline int pte_dirty(pte_t pte)	{ return pte_val(pte) & (_PAGE_DIRTY | _PAGE_MODIFIED); }
 
 static inline pte_t pte_mkold(pte_t pte)
 {
···
 
 static inline int pmd_dirty(pmd_t pmd)
 {
-	return !!(pmd_val(pmd) & _PAGE_MODIFIED);
+	return !!(pmd_val(pmd) & (_PAGE_DIRTY | _PAGE_MODIFIED));
 }
 
 static inline pmd_t pmd_mkclean(pmd_t pmd)

arch/loongarch/include/asm/qspinlock.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_QSPINLOCK_H
+#define _ASM_QSPINLOCK_H
+
+#include <asm-generic/qspinlock_types.h>
+
+#define queued_spin_unlock queued_spin_unlock
+
+static inline void queued_spin_unlock(struct qspinlock *lock)
+{
+	compiletime_assert_atomic_type(lock->locked);
+	c_sync();
+	WRITE_ONCE(lock->locked, 0);
+}
+
+#include <asm-generic/qspinlock.h>
+
+#endif /* _ASM_QSPINLOCK_H */

arch/loongarch/include/asm/suspend.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SUSPEND_H
+#define __ASM_SUSPEND_H
+
+void loongarch_common_suspend(void);
+void loongarch_common_resume(void);
+void loongarch_suspend_enter(void);
+void loongarch_wakeup_start(void);
+
+#endif

arch/loongarch/include/asm/tlb.h

···
 	INVTLB_GID_ADDR = 0x16,
 };
 
-/*
- * invtlb op info addr
- * (0x1 << 26) | (0x24 << 20) | (0x13 << 15) |
- * (addr << 10) | (info << 5) | op
- */
-static inline void invtlb(u32 op, u32 info, u64 addr)
+static __always_inline void invtlb(u32 op, u32 info, u64 addr)
 {
 	__asm__ __volatile__(
-		"parse_r addr,%0\n\t"
-		"parse_r info,%1\n\t"
-		".word ((0x6498000) | (addr << 10) | (info << 5) | %2)\n\t"
+		"invtlb %0, %1, %2\n\t"
 		:
-		: "r"(addr), "r"(info), "i"(op)
-		:
+		: "i"(op), "r"(info), "r"(addr)
+		: "memory"
 		);
 }
 
-static inline void invtlb_addr(u32 op, u32 info, u64 addr)
+static __always_inline void invtlb_addr(u32 op, u32 info, u64 addr)
 {
+	BUILD_BUG_ON(!__builtin_constant_p(info) || info != 0);
 	__asm__ __volatile__(
-		"parse_r addr,%0\n\t"
-		".word ((0x6498000) | (addr << 10) | (0 << 5) | %1)\n\t"
+		"invtlb %0, $zero, %1\n\t"
 		:
-		: "r"(addr), "i"(op)
-		:
+		: "i"(op), "r"(addr)
+		: "memory"
 		);
 }
 
-static inline void invtlb_info(u32 op, u32 info, u64 addr)
+static __always_inline void invtlb_info(u32 op, u32 info, u64 addr)
 {
+	BUILD_BUG_ON(!__builtin_constant_p(addr) || addr != 0);
 	__asm__ __volatile__(
-		"parse_r info,%0\n\t"
-		".word ((0x6498000) | (0 << 10) | (info << 5) | %1)\n\t"
+		"invtlb %0, %1, $zero\n\t"
 		:
-		: "r"(info), "i"(op)
-		:
+		: "i"(op), "r"(info)
+		: "memory"
 		);
 }
 
-static inline void invtlb_all(u32 op, u32 info, u64 addr)
+static __always_inline void invtlb_all(u32 op, u32 info, u64 addr)
 {
+	BUILD_BUG_ON(!__builtin_constant_p(info) || info != 0);
+	BUILD_BUG_ON(!__builtin_constant_p(addr) || addr != 0);
 	__asm__ __volatile__(
-		".word ((0x6498000) | (0 << 10) | (0 << 5) | %0)\n\t"
+		"invtlb %0, $zero, $zero\n\t"
 		:
 		: "i"(op)
-		:
+		: "memory"
 		);
 }
 
···
 extern void handle_tlb_modify(void);
 extern void handle_tlb_refill(void);
 extern void handle_tlb_protect(void);
+extern void handle_tlb_load_ptw(void);
+extern void handle_tlb_store_ptw(void);
+extern void handle_tlb_modify_ptw(void);
 
 extern void dump_tlb_all(void);
 extern void dump_tlb_regs(void);

arch/loongarch/include/asm/uprobes.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_LOONGARCH_UPROBES_H
+#define __ASM_LOONGARCH_UPROBES_H
+
+#include <asm/inst.h>
+
+typedef u32 uprobe_opcode_t;
+
+#define MAX_UINSN_BYTES		8
+#define UPROBE_XOL_SLOT_BYTES	MAX_UINSN_BYTES
+
+#define UPROBE_SWBP_INSN	larch_insn_gen_break(BRK_UPROBE_BP)
+#define UPROBE_SWBP_INSN_SIZE	LOONGARCH_INSN_SIZE
+
+#define UPROBE_XOLBP_INSN	larch_insn_gen_break(BRK_UPROBE_XOLBP)
+
+struct arch_uprobe {
+	unsigned long	resume_era;
+	u32	insn[2];
+	u32	ixol[2];
+	bool	simulate;
+};
+
+struct arch_uprobe_task {
+	unsigned long saved_trap_nr;
+};
+
+#ifdef CONFIG_UPROBES
+bool uprobe_breakpoint_handler(struct pt_regs *regs);
+bool uprobe_singlestep_handler(struct pt_regs *regs);
+#else /* !CONFIG_UPROBES */
+static inline bool uprobe_breakpoint_handler(struct pt_regs *regs) { return false; }
+static inline bool uprobe_singlestep_handler(struct pt_regs *regs) { return false; }
+#endif /* CONFIG_UPROBES */
+
+#endif /* __ASM_LOONGARCH_UPROBES_H */

arch/loongarch/include/asm/vdso/gettimeofday.h

···
 
 static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
 {
-	return get_vdso_data();
+	return (const struct vdso_data *)get_vdso_data();
 }
 
+#ifdef CONFIG_TIME_NS
+static __always_inline
+const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd)
+{
+	return (const struct vdso_data *)(get_vdso_data() + VVAR_TIMENS_PAGE_OFFSET * PAGE_SIZE);
+}
+#endif
 #endif /* !__ASSEMBLY__ */
 
 #endif /* __ASM_VDSO_GETTIMEOFDAY_H */

arch/loongarch/include/asm/vdso/vdso.h

···
 
 struct loongarch_vdso_data {
 	struct vdso_pcpu_data pdata[NR_CPUS];
-	struct vdso_data data[CS_BASES]; /* Arch-independent data */
 };
 
-#define VDSO_DATA_SIZE PAGE_ALIGN(sizeof(struct loongarch_vdso_data))
+/*
+ * The layout of vvar:
+ *
+ *                      high
+ * +---------------------+--------------------------+
+ * | loongarch vdso data | LOONGARCH_VDSO_DATA_SIZE |
+ * +---------------------+--------------------------+
+ * |  time-ns vdso data  |        PAGE_SIZE         |
+ * +---------------------+--------------------------+
+ * |  generic vdso data  |        PAGE_SIZE         |
+ * +---------------------+--------------------------+
+ *                      low
+ */
+#define LOONGARCH_VDSO_DATA_SIZE PAGE_ALIGN(sizeof(struct loongarch_vdso_data))
+#define LOONGARCH_VDSO_DATA_PAGES (LOONGARCH_VDSO_DATA_SIZE >> PAGE_SHIFT)
+
+enum vvar_pages {
+	VVAR_GENERIC_PAGE_OFFSET,
+	VVAR_TIMENS_PAGE_OFFSET,
+	VVAR_LOONGARCH_PAGES_START,
+	VVAR_LOONGARCH_PAGES_END = VVAR_LOONGARCH_PAGES_START + LOONGARCH_VDSO_DATA_PAGES - 1,
+	VVAR_NR_PAGES,
+};
+
+#define VVAR_SIZE (VVAR_NR_PAGES << PAGE_SHIFT)
 
 static inline unsigned long get_vdso_base(void)
 {
···
 	return addr;
 }
 
-static inline const struct vdso_data *get_vdso_data(void)
+static inline unsigned long get_vdso_data(void)
 {
-	return (const struct vdso_data *)(get_vdso_base()
-			- VDSO_DATA_SIZE + SMP_CACHE_BYTES * NR_CPUS);
+	return get_vdso_base() - VVAR_SIZE;
 }
 
 #endif /* __ASSEMBLY__ */

arch/loongarch/include/uapi/asm/hwcap.h

···
 #define HWCAP_LOONGARCH_LBT_X86		(1 << 10)
 #define HWCAP_LOONGARCH_LBT_ARM		(1 << 11)
 #define HWCAP_LOONGARCH_LBT_MIPS	(1 << 12)
+#define HWCAP_LOONGARCH_PTW		(1 << 13)
 
 #endif /* _UAPI_ASM_HWCAP_H */

arch/loongarch/include/uapi/asm/ptrace.h

···
 } __attribute__((aligned(8)));
 
 struct user_fp_state {
-	uint64_t    fpr[32];
-	uint64_t    fcc;
-	uint32_t    fcsr;
+	uint64_t fpr[32];
+	uint64_t fcc;
+	uint32_t fcsr;
+};
+
+struct user_lsx_state {
+	/* 32 registers, 128 bits width per register. */
+	uint64_t vregs[32*2];
+};
+
+struct user_lasx_state {
+	/* 32 registers, 256 bits width per register. */
+	uint64_t vregs[32*4];
 };
 
 struct user_watch_state {

arch/loongarch/include/uapi/asm/sigcontext.h

···
 	__u32	fcsr;
 };
 
+/* LSX context */
+#define LSX_CTX_MAGIC		0x53580001
+#define LSX_CTX_ALIGN		16
+struct lsx_context {
+	__u64	regs[2*32];
+	__u64	fcc;
+	__u32	fcsr;
+};
+
+/* LASX context */
+#define LASX_CTX_MAGIC		0x41535801
+#define LASX_CTX_ALIGN		32
+struct lasx_context {
+	__u64	regs[4*32];
+	__u64	fcc;
+	__u32	fcsr;
+};
+
 #endif /* _UAPI_ASM_SIGCONTEXT_H */

arch/loongarch/kernel/Makefile

···
   CFLAGS_REMOVE_inst.o = $(CC_FLAGS_FTRACE)
   CFLAGS_REMOVE_time.o = $(CC_FLAGS_FTRACE)
   CFLAGS_REMOVE_perf_event.o = $(CC_FLAGS_FTRACE)
+  CFLAGS_REMOVE_rethook.o = $(CC_FLAGS_FTRACE)
+  CFLAGS_REMOVE_rethook_trampoline.o = $(CC_FLAGS_FTRACE)
 endif
 
 obj-$(CONFIG_MODULES)		+= module.o module-sections.o
···
 obj-$(CONFIG_PERF_EVENTS)	+= perf_event.o perf_regs.o
 obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= hw_breakpoint.o
 
-obj-$(CONFIG_KPROBES)		+= kprobes.o kprobes_trampoline.o
+obj-$(CONFIG_KPROBES)		+= kprobes.o
+obj-$(CONFIG_RETHOOK)		+= rethook.o rethook_trampoline.o
+obj-$(CONFIG_UPROBES)		+= uprobes.o
+
+obj-$(CONFIG_JUMP_LABEL)	+= jump_label.o
 
 CPPFLAGS_vmlinux.lds		:= $(KBUILD_CFLAGS)

arch/loongarch/kernel/acpi.c

···
 
 #define PREFIX			"ACPI: "
 
+struct acpi_madt_core_pic acpi_core_pic[NR_CPUS];
+
 void __init __iomem * __acpi_map_table(unsigned long phys, unsigned long size)
 {
 
···
 
 	acpi_table_print_madt_entry(&header->common);
 #ifdef CONFIG_SMP
+	acpi_core_pic[processor->core_id] = *processor;
 	set_processor_mask(processor->core_id, processor->flags);
 #endif
 
···
 			acpi_parse_eio_master, MAX_IO_PICS);
 
 	loongson_sysconf.nr_cpus = num_processors;
+}
+
+int pptt_enabled;
+
+int __init parse_acpi_topology(void)
+{
+	int cpu, topology_id;
+
+	for_each_possible_cpu(cpu) {
+		topology_id = find_acpi_cpu_topology(cpu, 0);
+		if (topology_id < 0) {
+			pr_warn("Invalid BIOS PPTT\n");
+			return -ENOENT;
+		}
+
+		if (acpi_pptt_cpu_is_thread(cpu) <= 0)
+			cpu_data[cpu].core = topology_id;
+		else {
+			topology_id = find_acpi_cpu_topology(cpu, 1);
+			if (topology_id < 0)
+				return -ENOENT;
+
+			cpu_data[cpu].core = topology_id;
+		}
+	}
+
+	pptt_enabled = 1;
+
+	return 0;
 }
 
 #ifndef CONFIG_SUSPEND

arch/loongarch/kernel/cpu-probe.c

···
 		c->options |= LOONGARCH_CPU_FPU;
 		elf_hwcap |= HWCAP_LOONGARCH_FPU;
 	}
+#ifdef CONFIG_CPU_HAS_LSX
+	if (config & CPUCFG2_LSX) {
+		c->options |= LOONGARCH_CPU_LSX;
+		elf_hwcap |= HWCAP_LOONGARCH_LSX;
+	}
+#endif
+#ifdef CONFIG_CPU_HAS_LASX
+	if (config & CPUCFG2_LASX) {
+		c->options |= LOONGARCH_CPU_LASX;
+		elf_hwcap |= HWCAP_LOONGARCH_LASX;
+	}
+#endif
 	if (config & CPUCFG2_COMPLEX) {
 		c->options |= LOONGARCH_CPU_COMPLEX;
 		elf_hwcap |= HWCAP_LOONGARCH_COMPLEX;
···
 	if (config & CPUCFG2_CRYPTO) {
 		c->options |= LOONGARCH_CPU_CRYPTO;
 		elf_hwcap |= HWCAP_LOONGARCH_CRYPTO;
+	}
+	if (config & CPUCFG2_PTW) {
+		c->options |= LOONGARCH_CPU_PTW;
+		elf_hwcap |= HWCAP_LOONGARCH_PTW;
 	}
 	if (config & CPUCFG2_LVZP) {
 		c->options |= LOONGARCH_CPU_LVZ;

arch/loongarch/kernel/efi-header.S

···
 	.byte	0x02					/* MajorLinkerVersion */
 	.byte	0x14					/* MinorLinkerVersion */
 	.long	__inittext_end - .Lefi_header_end	/* SizeOfCode */
-	.long	_end - __initdata_begin			/* SizeOfInitializedData */
+	.long	_kernel_vsize				/* SizeOfInitializedData */
 	.long	0					/* SizeOfUninitializedData */
 	.long	__efistub_efi_pe_entry - _head		/* AddressOfEntryPoint */
 	.long	.Lefi_header_end - _head		/* BaseOfCode */
···
 		IMAGE_SCN_MEM_EXECUTE			/* Characteristics */
 
 	.ascii	".data\0\0\0"
-	.long	_end - __initdata_begin			/* VirtualSize */
+	.long	_kernel_vsize				/* VirtualSize */
 	.long	__initdata_begin - _head		/* VirtualAddress */
-	.long	_edata - __initdata_begin		/* SizeOfRawData */
+	.long	_kernel_rsize				/* SizeOfRawData */
 	.long	__initdata_begin - _head		/* PointerToRawData */
 
 	.long	0					/* PointerToRelocations */

arch/loongarch/kernel/fpu.S

···
 	movgr2fcsr	fcsr0, \tmp0
 	.endm
 
+	.macro sc_save_lsx base
+#ifdef CONFIG_CPU_HAS_LSX
+	EX	vst	$vr0,  \base, (0 * LSX_REG_WIDTH)
+	EX	vst	$vr1,  \base, (1 * LSX_REG_WIDTH)
+	EX	vst	$vr2,  \base, (2 * LSX_REG_WIDTH)
+	EX	vst	$vr3,  \base, (3 * LSX_REG_WIDTH)
+	EX	vst	$vr4,  \base, (4 * LSX_REG_WIDTH)
+	EX	vst	$vr5,  \base, (5 * LSX_REG_WIDTH)
+	EX	vst	$vr6,  \base, (6 * LSX_REG_WIDTH)
+	EX	vst	$vr7,  \base, (7 * LSX_REG_WIDTH)
+	EX	vst	$vr8,  \base, (8 * LSX_REG_WIDTH)
+	EX	vst	$vr9,  \base, (9 * LSX_REG_WIDTH)
+	EX	vst	$vr10, \base, (10 * LSX_REG_WIDTH)
+	EX	vst	$vr11, \base, (11 * LSX_REG_WIDTH)
+	EX	vst	$vr12, \base, (12 * LSX_REG_WIDTH)
+	EX	vst	$vr13, \base, (13 * LSX_REG_WIDTH)
+	EX	vst	$vr14, \base, (14 * LSX_REG_WIDTH)
+	EX	vst	$vr15, \base, (15 * LSX_REG_WIDTH)
+	EX	vst	$vr16, \base, (16 * LSX_REG_WIDTH)
+	EX	vst	$vr17, \base, (17 * LSX_REG_WIDTH)
+	EX	vst	$vr18, \base, (18 * LSX_REG_WIDTH)
+	EX	vst	$vr19, \base, (19 * LSX_REG_WIDTH)
+	EX	vst	$vr20, \base, (20 * LSX_REG_WIDTH)
+	EX	vst	$vr21, \base, (21 * LSX_REG_WIDTH)
+	EX	vst	$vr22, \base, (22 * LSX_REG_WIDTH)
+	EX	vst	$vr23, \base, (23 * LSX_REG_WIDTH)
+	EX	vst	$vr24, \base, (24 * LSX_REG_WIDTH)
+	EX	vst	$vr25, \base, (25 * LSX_REG_WIDTH)
+	EX	vst	$vr26, \base, (26 * LSX_REG_WIDTH)
+	EX	vst	$vr27, \base, (27 * LSX_REG_WIDTH)
+	EX	vst	$vr28, \base, (28 * LSX_REG_WIDTH)
+	EX	vst	$vr29, \base, (29 * LSX_REG_WIDTH)
+	EX	vst	$vr30, \base, (30 * LSX_REG_WIDTH)
+	EX	vst	$vr31, \base, (31 * LSX_REG_WIDTH)
+#endif
+	.endm
+
+	.macro sc_restore_lsx base
+#ifdef CONFIG_CPU_HAS_LSX
+	EX	vld	$vr0,  \base, (0 * LSX_REG_WIDTH)
+	EX	vld	$vr1,  \base, (1 * LSX_REG_WIDTH)
+	EX	vld	$vr2,  \base, (2 * LSX_REG_WIDTH)
+	EX	vld	$vr3,  \base, (3 * LSX_REG_WIDTH)
+	EX	vld	$vr4,  \base, (4 * LSX_REG_WIDTH)
+	EX	vld	$vr5,  \base, (5 * LSX_REG_WIDTH)
+	EX	vld	$vr6,  \base, (6 * LSX_REG_WIDTH)
+	EX	vld	$vr7,  \base, (7 * LSX_REG_WIDTH)
+	EX	vld	$vr8,  \base, (8 * LSX_REG_WIDTH)
+	EX	vld	$vr9,  \base, (9 * LSX_REG_WIDTH)
+	EX	vld	$vr10, \base, (10 * LSX_REG_WIDTH)
+	EX	vld	$vr11, \base, (11 * LSX_REG_WIDTH)
+	EX	vld	$vr12, \base, (12 * LSX_REG_WIDTH)
+	EX	vld	$vr13, \base, (13 * LSX_REG_WIDTH)
+	EX	vld	$vr14, \base, (14 * LSX_REG_WIDTH)
+	EX	vld	$vr15, \base, (15 * LSX_REG_WIDTH)
+	EX	vld	$vr16, \base, (16 * LSX_REG_WIDTH)
+	EX	vld	$vr17, \base, (17 * LSX_REG_WIDTH)
+	EX	vld	$vr18, \base, (18 * LSX_REG_WIDTH)
+	EX	vld	$vr19, \base, (19 * LSX_REG_WIDTH)
+	EX	vld	$vr20, \base, (20 * LSX_REG_WIDTH)
+	EX	vld	$vr21, \base, (21 * LSX_REG_WIDTH)
+	EX	vld	$vr22, \base, (22 * LSX_REG_WIDTH)
+	EX	vld	$vr23, \base, (23 * LSX_REG_WIDTH)
+	EX	vld	$vr24, \base, (24 * LSX_REG_WIDTH)
+	EX	vld	$vr25, \base, (25 * LSX_REG_WIDTH)
+	EX	vld	$vr26, \base, (26 * LSX_REG_WIDTH)
+	EX	vld	$vr27, \base, (27 * LSX_REG_WIDTH)
+	EX	vld	$vr28, \base, (28 * LSX_REG_WIDTH)
+	EX	vld	$vr29, \base, (29 * LSX_REG_WIDTH)
+	EX	vld	$vr30, \base, (30 * LSX_REG_WIDTH)
+	EX	vld	$vr31, \base, (31 * LSX_REG_WIDTH)
+#endif
+	.endm
+
+	.macro sc_save_lasx base
+#ifdef CONFIG_CPU_HAS_LASX
+	EX	xvst	$xr0,  \base, (0 * LASX_REG_WIDTH)
+	EX	xvst	$xr1,  \base, (1 * LASX_REG_WIDTH)
+	EX	xvst	$xr2,  \base, (2 * LASX_REG_WIDTH)
+	EX	xvst	$xr3,  \base, (3 * LASX_REG_WIDTH)
+	EX	xvst	$xr4,  \base, (4 * LASX_REG_WIDTH)
+	EX	xvst	$xr5,  \base, (5 * LASX_REG_WIDTH)
+	EX	xvst	$xr6,  \base, (6 * LASX_REG_WIDTH)
+	EX	xvst	$xr7,  \base, (7 * LASX_REG_WIDTH)
+	EX	xvst	$xr8,  \base, (8 * LASX_REG_WIDTH)
+	EX	xvst	$xr9,  \base, (9 * LASX_REG_WIDTH)
+	EX	xvst	$xr10, \base, (10 * LASX_REG_WIDTH)
+	EX	xvst	$xr11, \base, (11 * LASX_REG_WIDTH)
+	EX	xvst	$xr12, \base, (12 * LASX_REG_WIDTH)
+	EX	xvst	$xr13, \base, (13 * LASX_REG_WIDTH)
+	EX	xvst	$xr14, \base, (14 * LASX_REG_WIDTH)
+	EX	xvst	$xr15, \base, (15 * LASX_REG_WIDTH)
+	EX	xvst	$xr16, \base, (16 * LASX_REG_WIDTH)
+	EX	xvst	$xr17, \base, (17 * LASX_REG_WIDTH)
+	EX	xvst	$xr18, \base, (18 * LASX_REG_WIDTH)
+	EX	xvst	$xr19, \base, (19 * LASX_REG_WIDTH)
+	EX	xvst	$xr20, \base, (20 * LASX_REG_WIDTH)
+	EX	xvst	$xr21, \base, (21 * LASX_REG_WIDTH)
+	EX	xvst	$xr22, \base, (22 * LASX_REG_WIDTH)
+	EX	xvst	$xr23, \base, (23 * LASX_REG_WIDTH)
+	EX	xvst	$xr24, \base, (24 * LASX_REG_WIDTH)
+	EX	xvst	$xr25, \base, (25 * LASX_REG_WIDTH)
+	EX	xvst	$xr26, \base, (26 * LASX_REG_WIDTH)
+	EX	xvst	$xr27, \base, (27 * LASX_REG_WIDTH)
+	EX	xvst	$xr28, \base, (28 * LASX_REG_WIDTH)
+	EX	xvst	$xr29, \base, (29 * LASX_REG_WIDTH)
+	EX	xvst	$xr30, \base, (30 * LASX_REG_WIDTH)
+	EX	xvst	$xr31, \base, (31 * LASX_REG_WIDTH)
+#endif
+	.endm
+
+	.macro sc_restore_lasx base
+#ifdef CONFIG_CPU_HAS_LASX
+	EX	xvld	$xr0,  \base, (0 * LASX_REG_WIDTH)
+	EX	xvld	$xr1,  \base, (1 * LASX_REG_WIDTH)
+	EX	xvld	$xr2,  \base, (2 * LASX_REG_WIDTH)
+	EX	xvld	$xr3,  \base, (3 * LASX_REG_WIDTH)
+	EX	xvld	$xr4,  \base, (4 * LASX_REG_WIDTH)
+	EX	xvld	$xr5,  \base, (5 * LASX_REG_WIDTH)
+	EX	xvld	$xr6,  \base, (6 * LASX_REG_WIDTH)
+	EX	xvld	$xr7,  \base, (7 * LASX_REG_WIDTH)
+	EX	xvld	$xr8,  \base, (8 * LASX_REG_WIDTH)
+	EX	xvld	$xr9,  \base, (9 * LASX_REG_WIDTH)
+	EX	xvld	$xr10, \base, (10 * LASX_REG_WIDTH)
+	EX	xvld	$xr11, \base, (11 * LASX_REG_WIDTH)
+	EX	xvld	$xr12, \base, (12 * LASX_REG_WIDTH)
+	EX	xvld	$xr13, \base, (13 * LASX_REG_WIDTH)
+	EX	xvld	$xr14, \base, (14 * LASX_REG_WIDTH)
+	EX	xvld	$xr15, \base, (15 * LASX_REG_WIDTH)
+	EX	xvld	$xr16, \base, (16 * LASX_REG_WIDTH)
+	EX	xvld	$xr17, \base, (17 * LASX_REG_WIDTH)
+	EX	xvld	$xr18, \base, (18 * LASX_REG_WIDTH)
+	EX	xvld	$xr19, \base, (19 * LASX_REG_WIDTH)
+	EX	xvld	$xr20, \base, (20 * LASX_REG_WIDTH)
+	EX	xvld	$xr21, \base, (21 * LASX_REG_WIDTH)
+	EX	xvld	$xr22, \base, (22 * LASX_REG_WIDTH)
+	EX	xvld	$xr23, \base, (23 * LASX_REG_WIDTH)
+	EX	xvld	$xr24, \base, (24 * LASX_REG_WIDTH)
+	EX	xvld	$xr25, \base, (25 * LASX_REG_WIDTH)
+	EX	xvld	$xr26, \base, (26 * LASX_REG_WIDTH)
+	EX	xvld	$xr27, \base, (27 * LASX_REG_WIDTH)
+	EX	xvld	$xr28, \base, (28 * LASX_REG_WIDTH)
+	EX	xvld	$xr29, \base, (29 * LASX_REG_WIDTH)
+	EX	xvld	$xr30, \base, (30 * LASX_REG_WIDTH)
+	EX	xvld	$xr31, \base, (31 * LASX_REG_WIDTH)
+#endif
+	.endm
+
 /*
  * Save a thread's fp context.
  */
···
 	fpu_restore_cc		a0 t1 t2	# clobbers t1, t2
 	jr			ra
 SYM_FUNC_END(_restore_fp)
+
+#ifdef CONFIG_CPU_HAS_LSX
+
+/*
+ * Save a thread's LSX vector context.
+ */
+SYM_FUNC_START(_save_lsx)
+	lsx_save_all	a0 t1 t2
+	jr	ra
+SYM_FUNC_END(_save_lsx)
+EXPORT_SYMBOL(_save_lsx)
+
+/*
+ * Restore a thread's LSX vector context.
+ */
+SYM_FUNC_START(_restore_lsx)
+	lsx_restore_all	a0 t1 t2
+	jr	ra
+SYM_FUNC_END(_restore_lsx)
+
+SYM_FUNC_START(_save_lsx_upper)
+	lsx_save_all_upper a0 t0 t1
+	jr	ra
+SYM_FUNC_END(_save_lsx_upper)
+
+SYM_FUNC_START(_restore_lsx_upper)
+	lsx_restore_all_upper a0 t0 t1
+	jr	ra
+SYM_FUNC_END(_restore_lsx_upper)
+
+SYM_FUNC_START(_init_lsx_upper)
+	lsx_init_all_upper t1
+	jr	ra
+SYM_FUNC_END(_init_lsx_upper)
+#endif
+
+#ifdef CONFIG_CPU_HAS_LASX
+
+/*
+ * Save a thread's LASX vector context.
+ */
+SYM_FUNC_START(_save_lasx)
+	lasx_save_all	a0 t1 t2
+	jr	ra
+SYM_FUNC_END(_save_lasx)
+EXPORT_SYMBOL(_save_lasx)
+
+/*
+ * Restore a thread's LASX vector context.
+ */
+SYM_FUNC_START(_restore_lasx)
+	lasx_restore_all a0 t1 t2
+	jr	ra
+SYM_FUNC_END(_restore_lasx)
+
+SYM_FUNC_START(_save_lasx_upper)
+	lasx_save_all_upper a0 t0 t1
+	jr	ra
+SYM_FUNC_END(_save_lasx_upper)
+
+SYM_FUNC_START(_restore_lasx_upper)
+	lasx_restore_all_upper a0 t0 t1
+	jr	ra
+SYM_FUNC_END(_restore_lasx_upper)
+
+SYM_FUNC_START(_init_lasx_upper)
+	lasx_init_all_upper t1
+	jr	ra
+SYM_FUNC_END(_init_lasx_upper)
+#endif
 
 /*
  * Load the FPU with signalling NANS.  This bit pattern we're using has
···
 	li.w		a0, 0				# success
 	jr		ra
 SYM_FUNC_END(_restore_fp_context)
+
+/*
+ * a0: fpregs
+ * a1: fcc
+ * a2: fcsr
+ */
+SYM_FUNC_START(_save_lsx_context)
+	sc_save_fcc a1, t0, t1
+	sc_save_fcsr a2, t0
+	sc_save_lsx a0
+	li.w	a0, 0					# success
+	jr	ra
+SYM_FUNC_END(_save_lsx_context)
+
+/*
+ * a0: fpregs
+ * a1: fcc
+ * a2: fcsr
+ */
+SYM_FUNC_START(_restore_lsx_context)
+	sc_restore_lsx a0
+	sc_restore_fcc a1, t1, t2
+	sc_restore_fcsr a2, t1
+	li.w	a0, 0					# success
+	jr	ra
+SYM_FUNC_END(_restore_lsx_context)
+
+/*
+ * a0: fpregs
+ * a1: fcc
+ * a2: fcsr
+ */
+SYM_FUNC_START(_save_lasx_context)
+	sc_save_fcc a1, t0, t1
+	sc_save_fcsr a2, t0
+	sc_save_lasx a0
+	li.w	a0, 0					# success
+	jr	ra
+SYM_FUNC_END(_save_lasx_context)
+
+/*
+ * a0: fpregs
+ * a1: fcc
+ * a2: fcsr
+ */
+SYM_FUNC_START(_restore_lasx_context)
+	sc_restore_lasx a0
+	sc_restore_fcc a1, t1, t2
+	sc_restore_fcsr a2, t1
+	li.w	a0, 0					# success
+	jr	ra
+SYM_FUNC_END(_restore_lasx_context)
 
 SYM_FUNC_START(fault)
 	li.w	a0, -EFAULT				# failure

arch/loongarch/kernel/head.S

···
 	.word	MZ_MAGIC		/* "MZ", MS-DOS header */
 	.org	0x8
 	.dword	kernel_entry		/* Kernel entry point */
-	.dword	_end - _text		/* Kernel image effective size */
+	.dword	_kernel_asize		/* Kernel image effective size */
 	.quad	PHYS_LINK_KADDR		/* Kernel image load offset from start of RAM */
 	.org	0x38			/* 0x20 ~ 0x37 reserved */
 	.long	LINUX_PE_MAGIC
···
 pe_header:
 	__EFI_PE_HEADER
 
-SYM_DATA(kernel_asize, .long _end - _text);
-SYM_DATA(kernel_fsize, .long _edata - _text);
-SYM_DATA(kernel_offset, .long kernel_offset - _text);
+SYM_DATA(kernel_asize, .long _kernel_asize);
+SYM_DATA(kernel_fsize, .long _kernel_fsize);
+SYM_DATA(kernel_offset, .long _kernel_offset);
 
 #endif
 

arch/loongarch/kernel/inst.c

···
 	}
 }
 
+bool insns_not_supported(union loongarch_instruction insn)
+{
+	switch (insn.reg3_format.opcode) {
+	case amswapw_op ... ammindbdu_op:
+		pr_notice("atomic memory access instructions are not supported\n");
+		return true;
+	}
+
+	switch (insn.reg2i14_format.opcode) {
+	case llw_op:
+	case lld_op:
+	case scw_op:
+	case scd_op:
+		pr_notice("ll and sc instructions are not supported\n");
+		return true;
+	}
+
+	switch (insn.reg1i21_format.opcode) {
+	case bceqz_op:
+		pr_notice("bceqz and bcnez instructions are not supported\n");
+		return true;
+	}
+
+	return false;
+}
+
+bool insns_need_simulation(union loongarch_instruction insn)
+{
+	if (is_pc_ins(&insn))
+		return true;
+
+	if (is_branch_ins(&insn))
+		return true;
+
+	return false;
+}
+
+void arch_simulate_insn(union loongarch_instruction insn, struct pt_regs *regs)
+{
+	if (is_pc_ins(&insn))
+		simu_pc(regs, insn);
+	else if (is_branch_ins(&insn))
+		simu_branch(regs, insn);
+}
+
 int larch_insn_read(void *addr, u32 *insnp)
 {
 	int ret;
···
 	return insn.word;
 }
 
+u32 larch_insn_gen_break(int imm)
+{
+	union loongarch_instruction insn;
+
+	if (imm < 0 || imm >= SZ_32K) {
+		pr_warn("The generated break instruction is out of range.\n");
+		return INSN_BREAK;
+	}
+
+	emit_break(&insn, imm);
+
+	return insn.word;
+}
+
 u32 larch_insn_gen_or(enum loongarch_gpr rd, enum loongarch_gpr rj, enum loongarch_gpr rk)
 {
 	union loongarch_instruction insn;
···
 {
 	union loongarch_instruction insn;
 
+	if (imm < -SZ_512K || imm >= SZ_512K) {
+		pr_warn("The generated lu12i.w instruction is out of range.\n");
+		return INSN_BREAK;
+	}
+
 	emit_lu12iw(&insn, rd, imm);
 
 	return insn.word;
···
 u32 larch_insn_gen_lu32id(enum loongarch_gpr rd, int imm)
 {
 	union loongarch_instruction insn;
+
+	if (imm < -SZ_512K || imm >= SZ_512K) {
+		pr_warn("The generated lu32i.d instruction is out of range.\n");
+		return INSN_BREAK;
+	}
 
 	emit_lu32id(&insn, rd, imm);
 
···
 {
 	union loongarch_instruction insn;
 
+	if (imm < -SZ_2K || imm >= SZ_2K) {
+		pr_warn("The generated lu52i.d instruction is out of range.\n");
+		return INSN_BREAK;
+	}
+
 	emit_lu52id(&insn, rd, rj, imm);
 
 	return insn.word;
 }
 
-u32 larch_insn_gen_jirl(enum loongarch_gpr rd, enum loongarch_gpr rj, unsigned long pc, unsigned long dest)
+u32 larch_insn_gen_jirl(enum loongarch_gpr rd, enum loongarch_gpr rj, int imm)
 {
 	union loongarch_instruction insn;
 
-	emit_jirl(&insn, rj, rd, (dest - pc) >> 2);
+	if ((imm & 3) || imm < -SZ_128K || imm >= SZ_128K) {
+		pr_warn("The generated jirl instruction is out of range.\n");
+		return INSN_BREAK;
+	}
+
+	emit_jirl(&insn, rj, rd, imm >> 2);
 
 	return insn.word;
 }

arch/loongarch/kernel/jump_label.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ *
+ * Based on arch/arm64/kernel/jump_label.c
+ */
+#include <linux/kernel.h>
+#include <linux/jump_label.h>
+#include <asm/inst.h>
+
+void arch_jump_label_transform(struct jump_entry *entry, enum jump_label_type type)
+{
+	u32 insn;
+	void *addr = (void *)jump_entry_code(entry);
+
+	if (type == JUMP_LABEL_JMP)
+		insn = larch_insn_gen_b(jump_entry_code(entry), jump_entry_target(entry));
+	else
+		insn = larch_insn_gen_nop();
+
+	larch_insn_patch_text(addr, insn);
+}

arch/loongarch/kernel/kprobes.c

···
 #include <linux/preempt.h>
 #include <asm/break.h>
 
-static const union loongarch_instruction breakpoint_insn = {
-	.reg0i15_format = {
-		.opcode = break_op,
-		.immediate = BRK_KPROBE_BP,
-	}
-};
-
-static const union loongarch_instruction singlestep_insn = {
-	.reg0i15_format = {
-		.opcode = break_op,
-		.immediate = BRK_KPROBE_SSTEPBP,
-	}
-};
+#define KPROBE_BP_INSN		larch_insn_gen_break(BRK_KPROBE_BP)
+#define KPROBE_SSTEPBP_INSN	larch_insn_gen_break(BRK_KPROBE_SSTEPBP)
 
 DEFINE_PER_CPU(struct kprobe *, current_kprobe);
 DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
 
-static bool insns_not_supported(union loongarch_instruction insn)
-{
-	switch (insn.reg2i14_format.opcode) {
-	case llw_op:
-	case lld_op:
-	case scw_op:
-	case scd_op:
-		pr_notice("kprobe: ll and sc instructions are not supported\n");
-		return true;
-	}
-
-	switch (insn.reg1i21_format.opcode) {
-	case bceqz_op:
-		pr_notice("kprobe: bceqz and bcnez instructions are not supported\n");
-		return true;
-	}
-
-	return false;
-}
-NOKPROBE_SYMBOL(insns_not_supported);
-
-static bool insns_need_simulation(struct kprobe *p)
-{
-	if (is_pc_ins(&p->opcode))
-		return true;
-
-	if (is_branch_ins(&p->opcode))
-		return true;
-
-	return false;
-}
-NOKPROBE_SYMBOL(insns_need_simulation);
-
-static void arch_simulate_insn(struct kprobe *p, struct pt_regs *regs)
-{
-	if (is_pc_ins(&p->opcode))
-		simu_pc(regs, p->opcode);
-	else if (is_branch_ins(&p->opcode))
-		simu_branch(regs, p->opcode);
-}
-NOKPROBE_SYMBOL(arch_simulate_insn);
-
 static void arch_prepare_ss_slot(struct kprobe *p)
 {
 	p->ainsn.insn[0] = *p->addr;
-	p->ainsn.insn[1] = singlestep_insn;
+	p->ainsn.insn[1] = KPROBE_SSTEPBP_INSN;
 	p->ainsn.restore = (unsigned long)p->addr + LOONGARCH_INSN_SIZE;
 }
 NOKPROBE_SYMBOL(arch_prepare_ss_slot);
···
 
 int arch_prepare_kprobe(struct kprobe *p)
 {
+	union loongarch_instruction insn;
+
 	if ((unsigned long)p->addr & 0x3)
 		return -EILSEQ;
 
 	/* copy instruction */
 	p->opcode = *p->addr;
+	insn.word = p->opcode;
 
 	/* decode instruction */
-	if (insns_not_supported(p->opcode))
+	if (insns_not_supported(insn))
 		return -EINVAL;
 
-	if (insns_need_simulation(p)) {
+	if (insns_need_simulation(insn)) {
 		p->ainsn.insn = NULL;
 	} else {
 		p->ainsn.insn = get_insn_slot();
···
 /* Install breakpoint in text */
 void arch_arm_kprobe(struct kprobe *p)
 {
-	*p->addr = breakpoint_insn;
+	*p->addr = KPROBE_BP_INSN;
 	flush_insn_slot(p);
 }
 NOKPROBE_SYMBOL(arch_arm_kprobe);
···
 static void setup_singlestep(struct kprobe *p, struct pt_regs *regs,
 			     struct kprobe_ctlblk *kcb, int reenter)
 {
+	union loongarch_instruction insn;
+
 	if (reenter) {
 		save_previous_kprobe(kcb);
 		set_current_kprobe(p);
···
 		regs->csr_era = (unsigned long)p->ainsn.insn;
 	} else {
 		/* simulate single steping */
-		arch_simulate_insn(p, regs);
+		insn.word = p->opcode;
+		arch_simulate_insn(insn, regs);
 		/* now go for post processing */
 		post_kprobe_handler(p, kcb, regs);
 	}
···
 		}
 	}
 
-	if (addr->word != breakpoint_insn.word) {
+	if (*addr != KPROBE_BP_INSN) {
 		/*
 		 * The breakpoint instruction was removed right
 		 * after we hit it.  Another cpu has removed
···
 {
 	return 0;
 }
-
-/* ASM function that handles the kretprobes must not be probed */
-NOKPROBE_SYMBOL(__kretprobe_trampoline);
-
-/* Called from __kretprobe_trampoline */
-void __used *trampoline_probe_handler(struct pt_regs *regs)
-{
-	return (void *)kretprobe_trampoline_handler(regs, NULL);
-}
-NOKPROBE_SYMBOL(trampoline_probe_handler);
-
-void arch_prepare_kretprobe(struct kretprobe_instance *ri,
-			    struct pt_regs *regs)
-{
-	ri->ret_addr = (kprobe_opcode_t *)regs->regs[1];
-	ri->fp = NULL;
-
-	/* Replace the return addr with trampoline addr */
-	regs->regs[1] = (unsigned long)&__kretprobe_trampoline;
-}
-NOKPROBE_SYMBOL(arch_prepare_kretprobe);
 
 int arch_trampoline_kprobe(struct kprobe *p)
 {

arch/loongarch/kernel/kprobes_trampoline.S arch/loongarch/kernel/rethook_trampoline.S

···
 	csrxchg t0, t1, LOONGARCH_CSR_CRMD
 	.endm
 
-SYM_CODE_START(__kretprobe_trampoline)
+SYM_CODE_START(arch_rethook_trampoline)
 	addi.d	sp, sp, -PT_SIZE
 	save_all_base_regs
 
···
 
 	move a0, sp /* pt_regs */
 
-	bl trampoline_probe_handler
+	bl arch_rethook_trampoline_callback
 
 	/* use the result as the return-address */
 	move ra, a0
···
 	addi.d	sp, sp, PT_SIZE
 
 	jr ra
-SYM_CODE_END(__kretprobe_trampoline)
+SYM_CODE_END(arch_rethook_trampoline)

arch/loongarch/kernel/proc.c

···
 	seq_printf(m, "processor\t\t: %ld\n", n);
 	seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package);
 	seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core);
+	seq_printf(m, "global_id\t\t: %d\n", cpu_data[n].global_id);
 	seq_printf(m, "CPU Family\t\t: %s\n", __cpu_family[n]);
 	seq_printf(m, "Model Name\t\t: %s\n", __cpu_full_name[n]);
 	seq_printf(m, "CPU Revision\t\t: 0x%02x\n", version);
···
 	if (cpu_has_crc32)	seq_printf(m, " crc32");
 	if (cpu_has_complex)	seq_printf(m, " complex");
 	if (cpu_has_crypto)	seq_printf(m, " crypto");
+	if (cpu_has_ptw)	seq_printf(m, " ptw");
 	if (cpu_has_lvz)	seq_printf(m, " lvz");
 	if (cpu_has_lbt_x86)	seq_printf(m, " lbt_x86");
 	if (cpu_has_lbt_arm)	seq_printf(m, " lbt_arm");

arch/loongarch/kernel/process.c

···
 	 */
 	preempt_disable();
 
-	if (is_fpu_owner())
-		save_fp(current);
+	if (is_fpu_owner()) {
+		if (is_lasx_enabled())
+			save_lasx(current);
+		else if (is_lsx_enabled())
+			save_lsx(current);
+		else
+			save_fp(current);
+	}
 
 	preempt_enable();
 
···
 
 	/* Space for the VDSO & data page */
 	top -= PAGE_ALIGN(current->thread.vdso->size);
-	top -= PAGE_SIZE;
+	top -= VVAR_SIZE;
 
 	/* Space to randomize the VDSO base */
 	if (current->flags & PF_RANDOMIZE)

arch/loongarch/kernel/ptrace.c

···
 	return 0;
 }
 
+#ifdef CONFIG_CPU_HAS_LSX
+
+static void copy_pad_fprs(struct task_struct *target,
+			 const struct user_regset *regset,
+			 struct membuf *to, unsigned int live_sz)
+{
+	int i, j;
+	unsigned long long fill = ~0ull;
+	unsigned int cp_sz, pad_sz;
+
+	cp_sz = min(regset->size, live_sz);
+	pad_sz = regset->size - cp_sz;
+	WARN_ON(pad_sz % sizeof(fill));
+
+	for (i = 0; i < NUM_FPU_REGS; i++) {
+		membuf_write(to, &target->thread.fpu.fpr[i], cp_sz);
+		for (j = 0; j < (pad_sz / sizeof(fill)); j++) {
+			membuf_store(to, fill);
+		}
+	}
+}
+
+static int simd_get(struct task_struct *target,
+		    const struct user_regset *regset,
+		    struct membuf to)
+{
+	const unsigned int wr_size = NUM_FPU_REGS * regset->size;
+
+	if (!tsk_used_math(target)) {
+		/* The task hasn't used FP or LSX, fill with 0xff */
+		copy_pad_fprs(target, regset, &to, 0);
+	} else if (!test_tsk_thread_flag(target, TIF_LSX_CTX_LIVE)) {
+		/* Copy scalar FP context, fill the rest with 0xff */
+		copy_pad_fprs(target, regset, &to, 8);
+#ifdef CONFIG_CPU_HAS_LASX
+	} else if (!test_tsk_thread_flag(target, TIF_LASX_CTX_LIVE)) {
+		/* Copy LSX 128 Bit context, fill the rest with 0xff */
+		copy_pad_fprs(target, regset, &to, 16);
+#endif
+	} else if (sizeof(target->thread.fpu.fpr[0]) == regset->size) {
+		/* Trivially copy the vector registers */
+		membuf_write(&to, &target->thread.fpu.fpr, wr_size);
+	} else {
+		/* Copy as much context as possible, fill the rest with 0xff */
+		copy_pad_fprs(target, regset, &to, sizeof(target->thread.fpu.fpr[0]));
+	}
+
+	return 0;
+}
+
+static int simd_set(struct task_struct *target,
+		    const struct user_regset *regset,
+		    unsigned int pos, unsigned int count,
+		    const void *kbuf, const void __user *ubuf)
+{
+	const unsigned int wr_size = NUM_FPU_REGS * regset->size;
+	unsigned int cp_sz;
+	int i, err, start;
+
+	init_fp_ctx(target);
+
+	if (sizeof(target->thread.fpu.fpr[0]) == regset->size) {
+		/* Trivially copy the vector registers */
+		err = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+					 &target->thread.fpu.fpr,
+					 0, wr_size);
+	} else {
+		/* Copy as much context as possible */
+		cp_sz = min_t(unsigned int, regset->size,
+			      sizeof(target->thread.fpu.fpr[0]));
+
+		i = start = err = 0;
+		for (; i < NUM_FPU_REGS; i++, start += regset->size) {
+			err |= user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+						  &target->thread.fpu.fpr[i],
+						  start, start + cp_sz);
+		}
+	}
+
+	return err;
+}
+
+#endif /* CONFIG_CPU_HAS_LSX */
+
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
 
 /*
···
 	REGSET_GPR,
 	REGSET_FPR,
 	REGSET_CPUCFG,
+#ifdef CONFIG_CPU_HAS_LSX
+	REGSET_LSX,
+#endif
+#ifdef CONFIG_CPU_HAS_LASX
+	REGSET_LASX,
+#endif
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
 	REGSET_HW_BREAK,
 	REGSET_HW_WATCH,
···
 		.regset_get	= cfg_get,
 		.set		= cfg_set,
 	},
+#ifdef CONFIG_CPU_HAS_LSX
+	[REGSET_LSX] = {
+		.core_note_type	= NT_LOONGARCH_LSX,
+		.n		= NUM_FPU_REGS,
+		.size		= 16,
+		.align		= 16,
+		.regset_get	= simd_get,
+		.set		= simd_set,
+	},
+#endif
+#ifdef CONFIG_CPU_HAS_LASX
+	[REGSET_LASX] = {
+		.core_note_type	= NT_LOONGARCH_LASX,
+		.n		= NUM_FPU_REGS,
+		.size		= 32,
+		.align		= 32,
+		.regset_get	= simd_get,
+		.set		= simd_set,
+	},
+#endif
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
 	[REGSET_HW_BREAK] = {
 		.core_note_type = NT_LOONGARCH_HW_BREAK,

arch/loongarch/kernel/rethook.c

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic return hook for LoongArch.
+ */
+
+#include <linux/kprobes.h>
+#include <linux/rethook.h>
+#include "rethook.h"
+
+/* This is called from arch_rethook_trampoline() */
+unsigned long __used arch_rethook_trampoline_callback(struct pt_regs *regs)
+{
+	return rethook_trampoline_handler(regs, 0);
+}
+NOKPROBE_SYMBOL(arch_rethook_trampoline_callback);
+
+void arch_rethook_prepare(struct rethook_node *rhn, struct pt_regs *regs, bool mcount)
+{
+	rhn->frame = 0;
+	rhn->ret_addr = regs->regs[1];
+
+	/* replace return addr with trampoline */
+	regs->regs[1] = (unsigned long)arch_rethook_trampoline;
+}
+NOKPROBE_SYMBOL(arch_rethook_prepare);
+
+/* ASM function that handles the rethook must not be probed itself */
+NOKPROBE_SYMBOL(arch_rethook_trampoline);

arch/loongarch/kernel/rethook.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LOONGARCH_RETHOOK_H
+#define __LOONGARCH_RETHOOK_H
+
+unsigned long arch_rethook_trampoline_callback(struct pt_regs *regs);
+void arch_rethook_prepare(struct rethook_node *rhn, struct pt_regs *regs, bool mcount);
+
+#endif

arch/loongarch/kernel/signal.c

···
 _save_fp_context(void __user *fpregs, void __user *fcc, void __user *csr);
 extern asmlinkage int
 _restore_fp_context(void __user *fpregs, void __user *fcc, void __user *csr);
+extern asmlinkage int
+_save_lsx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
+extern asmlinkage int
+_restore_lsx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
+extern asmlinkage int
+_save_lasx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
+extern asmlinkage int
+_restore_lasx_context(void __user *fpregs, void __user *fcc, void __user *fcsr);
 
 struct rt_sigframe {
 	struct siginfo rs_info;
···
 	unsigned long size;
 	unsigned int flags;
 	struct _ctx_layout fpu;
+	struct _ctx_layout lsx;
+	struct _ctx_layout lasx;
 	struct _ctx_layout end;
 };
 
···
 	return err;
 }
 
+static int copy_lsx_to_sigcontext(struct lsx_context __user *ctx)
+{
+	int i;
+	int err = 0;
+	uint64_t __user *regs	= (uint64_t *)&ctx->regs;
+	uint64_t __user *fcc	= &ctx->fcc;
+	uint32_t __user *fcsr	= &ctx->fcsr;
+
+	for (i = 0; i < NUM_FPU_REGS; i++) {
+		err |= __put_user(get_fpr64(&current->thread.fpu.fpr[i], 0),
+				  &regs[2*i]);
+		err |= __put_user(get_fpr64(&current->thread.fpu.fpr[i], 1),
+				  &regs[2*i+1]);
+	}
+	err |= __put_user(current->thread.fpu.fcc, fcc);
+	err |= __put_user(current->thread.fpu.fcsr, fcsr);
+
+	return err;
+}
+
+static int copy_lsx_from_sigcontext(struct lsx_context __user *ctx)
+{
+	int i;
+	int err = 0;
+	u64 fpr_val;
+	uint64_t __user *regs	= (uint64_t *)&ctx->regs;
+	uint64_t __user *fcc	= &ctx->fcc;
+	uint32_t __user *fcsr	= &ctx->fcsr;
+
+	for (i = 0; i < NUM_FPU_REGS; i++) {
+		err |= __get_user(fpr_val, &regs[2*i]);
+		set_fpr64(&current->thread.fpu.fpr[i], 0, fpr_val);
+		err |= __get_user(fpr_val, &regs[2*i+1]);
+		set_fpr64(&current->thread.fpu.fpr[i], 1, fpr_val);
+	}
+	err |= __get_user(current->thread.fpu.fcc, fcc);
+	err |= __get_user(current->thread.fpu.fcsr, fcsr);
+
+	return err;
+}
+
+static int copy_lasx_to_sigcontext(struct lasx_context __user *ctx)
+{
+	int i;
+	int err = 0;
+	uint64_t __user *regs	= (uint64_t *)&ctx->regs;
+	uint64_t __user *fcc	= &ctx->fcc;
+	uint32_t __user *fcsr	= &ctx->fcsr;
+
+	for (i = 0; i < NUM_FPU_REGS; i++) {
+		err |= __put_user(get_fpr64(&current->thread.fpu.fpr[i], 0),
+				  &regs[4*i]);
+		err |= __put_user(get_fpr64(&current->thread.fpu.fpr[i], 1),
+				  &regs[4*i+1]);
+		err |= __put_user(get_fpr64(&current->thread.fpu.fpr[i], 2),
+				  &regs[4*i+2]);
+		err |= __put_user(get_fpr64(&current->thread.fpu.fpr[i], 3),
+				  &regs[4*i+3]);
+	}
+	err |= __put_user(current->thread.fpu.fcc, fcc);
+	err |= __put_user(current->thread.fpu.fcsr, fcsr);
+
+	return err;
+}
+
+static int copy_lasx_from_sigcontext(struct lasx_context __user *ctx)
+{
+	int i;
+	int err = 0;
+	u64 fpr_val;
+	uint64_t __user *regs	= (uint64_t *)&ctx->regs;
+	uint64_t __user *fcc	= &ctx->fcc;
+	uint32_t __user *fcsr	= &ctx->fcsr;
+
+	for (i = 0; i < NUM_FPU_REGS; i++) {
+		err |= __get_user(fpr_val, &regs[4*i]);
+		set_fpr64(&current->thread.fpu.fpr[i], 0, fpr_val);
+		err |= __get_user(fpr_val, &regs[4*i+1]);
+		set_fpr64(&current->thread.fpu.fpr[i], 1, fpr_val);
+		err |= __get_user(fpr_val, &regs[4*i+2]);
+		set_fpr64(&current->thread.fpu.fpr[i], 2, fpr_val);
+		err |= __get_user(fpr_val, &regs[4*i+3]);
+		set_fpr64(&current->thread.fpu.fpr[i], 3, fpr_val);
+	}
+	err |= __get_user(current->thread.fpu.fcc, fcc);
+	err |= __get_user(current->thread.fpu.fcsr, fcsr);
+
+	return err;
+}
+
 /*
  * Wrappers for the assembly _{save,restore}_fp_context functions.
  */
···
 	uint32_t __user *fcsr	= &ctx->fcsr;
 
 	return _restore_fp_context(regs, fcc, fcsr);
+}
+
+static int save_hw_lsx_context(struct lsx_context __user *ctx)
+{
+	uint64_t __user *regs	= (uint64_t *)&ctx->regs;
+	uint64_t __user *fcc	= &ctx->fcc;
+	uint32_t __user *fcsr	= &ctx->fcsr;
+
+	return _save_lsx_context(regs, fcc, fcsr);
+}
+
+static int restore_hw_lsx_context(struct lsx_context __user *ctx)
+{
+	uint64_t __user *regs	= (uint64_t *)&ctx->regs;
+	uint64_t __user *fcc	= &ctx->fcc;
+	uint32_t __user *fcsr	= &ctx->fcsr;
+
+	return _restore_lsx_context(regs, fcc, fcsr);
+}
+
+static int save_hw_lasx_context(struct lasx_context __user *ctx)
+{
+	uint64_t __user *regs	= (uint64_t *)&ctx->regs;
+	uint64_t __user *fcc	= &ctx->fcc;
+	uint32_t __user *fcsr	= &ctx->fcsr;
+
+	return _save_lasx_context(regs, fcc, fcsr);
+}
+
+static int restore_hw_lasx_context(struct lasx_context __user *ctx)
+{
+	uint64_t __user *regs	= (uint64_t *)&ctx->regs;
+	uint64_t __user *fcc	= &ctx->fcc;
+	uint32_t __user *fcsr	= &ctx->fcsr;
+
+	return _restore_lasx_context(regs, fcc, fcsr);
 }
 
 static int fcsr_pending(unsigned int __user *fcsr)
···
 	return err ?: sig;
 }
 
+static int protected_save_lsx_context(struct extctx_layout *extctx)
+{
+	int err = 0;
+	struct sctx_info __user *info = extctx->lsx.addr;
+	struct lsx_context __user *lsx_ctx = (struct lsx_context *)get_ctx_through_ctxinfo(info);
+	uint64_t __user *regs	= (uint64_t *)&lsx_ctx->regs;
+	uint64_t __user *fcc	= &lsx_ctx->fcc;
+	uint32_t __user *fcsr	= &lsx_ctx->fcsr;
+
+	while (1) {
+		lock_fpu_owner();
+		if (is_lsx_enabled())
+			err = save_hw_lsx_context(lsx_ctx);
+		else {
+			if (is_fpu_owner())
+				save_fp(current);
+			err = copy_lsx_to_sigcontext(lsx_ctx);
+		}
+		unlock_fpu_owner();
+
+		err |= __put_user(LSX_CTX_MAGIC, &info->magic);
+		err |= __put_user(extctx->lsx.size, &info->size);
+
+		if (likely(!err))
+			break;
+		/* Touch the LSX context and try again */
+		err = __put_user(0, &regs[0]) |
+			__put_user(0, &regs[32*2-1]) |
+			__put_user(0, fcc) |
+			__put_user(0, fcsr);
+		if (err)
+			return err;	/* really bad sigcontext */
+	}
+
+	return err;
+}
+
+static int protected_restore_lsx_context(struct extctx_layout *extctx)
+{
+	int err = 0, sig = 0, tmp __maybe_unused;
+	struct sctx_info __user *info = extctx->lsx.addr;
+	struct lsx_context __user *lsx_ctx = (struct lsx_context *)get_ctx_through_ctxinfo(info);
+	uint64_t __user *regs	= (uint64_t *)&lsx_ctx->regs;
+	uint64_t __user *fcc	= &lsx_ctx->fcc;
+	uint32_t __user *fcsr	= &lsx_ctx->fcsr;
+
+	err = sig = fcsr_pending(fcsr);
+	if (err < 0)
+		return err;
+
+	while (1) {
+		lock_fpu_owner();
+		if (is_lsx_enabled())
+			err = restore_hw_lsx_context(lsx_ctx);
+		else {
+			err = copy_lsx_from_sigcontext(lsx_ctx);
+			if (is_fpu_owner())
+				restore_fp(current);
+		}
+		unlock_fpu_owner();
+
+		if (likely(!err))
+			break;
+		/* Touch the LSX context and try again */
+		err = __get_user(tmp, &regs[0]) |
+			__get_user(tmp, &regs[32*2-1]) |
+			__get_user(tmp, fcc) |
+			__get_user(tmp, fcsr);
+		if (err)
+			break;	/* really bad sigcontext */
+	}
+
+	return err ?: sig;
+}
+
+static int protected_save_lasx_context(struct extctx_layout *extctx)
+{
+	int err = 0;
+	struct sctx_info __user *info = extctx->lasx.addr;
+	struct lasx_context __user *lasx_ctx =
+		(struct lasx_context *)get_ctx_through_ctxinfo(info);
+	uint64_t __user *regs	= (uint64_t *)&lasx_ctx->regs;
+	uint64_t __user *fcc	= &lasx_ctx->fcc;
+	uint32_t __user *fcsr	= &lasx_ctx->fcsr;
+
+	while (1) {
+		lock_fpu_owner();
+		if (is_lasx_enabled())
+			err = save_hw_lasx_context(lasx_ctx);
+		else {
+			if (is_lsx_enabled())
+				save_lsx(current);
+			else if (is_fpu_owner())
+				save_fp(current);
+			err = copy_lasx_to_sigcontext(lasx_ctx);
+		}
+		unlock_fpu_owner();
+
+		err |= __put_user(LASX_CTX_MAGIC, &info->magic);
+		err |= __put_user(extctx->lasx.size, &info->size);
+
+		if (likely(!err))
+			break;
+		/* Touch the LASX context and try again */
+		err = __put_user(0, &regs[0]) |
+			__put_user(0, &regs[32*4-1]) |
+			__put_user(0, fcc) |
+			__put_user(0, fcsr);
+		if (err)
+			return err;	/* really bad sigcontext */
+	}
+
+	return err;
+}
+
+static int protected_restore_lasx_context(struct extctx_layout *extctx)
+{
+	int err = 0, sig = 0, tmp __maybe_unused;
+	struct sctx_info __user *info = extctx->lasx.addr;
+	struct lasx_context __user *lasx_ctx =
+		(struct lasx_context *)get_ctx_through_ctxinfo(info);
+	uint64_t __user *regs	= (uint64_t *)&lasx_ctx->regs;
+	uint64_t __user *fcc	= &lasx_ctx->fcc;
+	uint32_t __user *fcsr	= &lasx_ctx->fcsr;
+
+	err = sig = fcsr_pending(fcsr);
+	if (err < 0)
+		return err;
+
+	while (1) {
+		lock_fpu_owner();
+		if (is_lasx_enabled())
+			err = restore_hw_lasx_context(lasx_ctx);
+		else {
+			err = copy_lasx_from_sigcontext(lasx_ctx);
+			if (is_lsx_enabled())
+				restore_lsx(current);
+			else if (is_fpu_owner())
+				restore_fp(current);
+		}
+		unlock_fpu_owner();
+
+		if (likely(!err))
+			break;
+		/* Touch the LASX context and try again */
+		err = __get_user(tmp, &regs[0]) |
+			__get_user(tmp, &regs[32*4-1]) |
+			__get_user(tmp, fcc) |
+			__get_user(tmp, fcsr);
+		if (err)
+			break;	/* really bad sigcontext */
+	}
+
+	return err ?: sig;
+}
+
 static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
 			    struct extctx_layout *extctx)
 {
···
 	for (i = 1; i < 32; i++)
 		err |= __put_user(regs->regs[i], &sc->sc_regs[i]);
 
-	if (extctx->fpu.addr)
+	if (extctx->lasx.addr)
+		err |= protected_save_lasx_context(extctx);
+	else if (extctx->lsx.addr)
+		err |= protected_save_lsx_context(extctx);
+	else if (extctx->fpu.addr)
 		err |= protected_save_fpu_context(extctx);
 
 	/* Set the "end" magic */
···
 				    sizeof(struct fpu_context)))
 				goto invalid;
 			extctx->fpu.addr = info;
+			break;
+
+		case LSX_CTX_MAGIC:
+			if (size < (sizeof(struct sctx_info) +
+				    sizeof(struct lsx_context)))
+				goto invalid;
+			extctx->lsx.addr = info;
+			break;
+
+		case LASX_CTX_MAGIC:
+			if (size < (sizeof(struct sctx_info) +
+				    sizeof(struct lasx_context)))
+				goto invalid;
+			extctx->lasx.addr = info;
 			break;
 
 		default:
···
 	for (i = 1; i < 32; i++)
 		err |= __get_user(regs->regs[i], &sc->sc_regs[i]);
 
-	if (extctx.fpu.addr)
+	if (extctx.lasx.addr)
+		err |= protected_restore_lasx_context(&extctx);
+	else if (extctx.lsx.addr)
+		err |= protected_restore_lsx_context(&extctx);
+	else if (extctx.fpu.addr)
 		err |= protected_restore_fpu_context(&extctx);
 
 bad:
···
 	extctx->size += extctx->end.size;
 
 	if (extctx->flags & SC_USED_FP) {
-		if (cpu_has_fpu)
+		if (cpu_has_lasx && thread_lasx_context_live())
+			new_sp = extframe_alloc(extctx, &extctx->lasx,
+			  sizeof(struct lasx_context), LASX_CTX_ALIGN, new_sp);
+		else if (cpu_has_lsx && thread_lsx_context_live())
+			new_sp = extframe_alloc(extctx, &extctx->lsx,
+			  sizeof(struct lsx_context), LSX_CTX_ALIGN, new_sp);
+		else if (cpu_has_fpu)
 			new_sp = extframe_alloc(extctx, &extctx->fpu,
 			  sizeof(struct fpu_context), FPU_CTX_ALIGN, new_sp);
 	}

arch/loongarch/kernel/smp.c

···
  * Copyright (C) 2000, 2001 Silicon Graphics, Inc.
  * Copyright (C) 2000, 2001, 2003 Broadcom Corporation
  */
+#include <linux/acpi.h>
 #include <linux/cpu.h>
 #include <linux/cpumask.h>
 #include <linux/init.h>
···
 
 int __cpu_logical_map[NR_CPUS];		/* Map logical to physical */
 EXPORT_SYMBOL(__cpu_logical_map);
-
-/* Number of threads (siblings) per CPU core */
-int smp_num_siblings = 1;
-EXPORT_SYMBOL(smp_num_siblings);
 
 /* Representing the threads (siblings) of each logical CPU */
 cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly;
···
 	action = iocsr_read32(LOONGARCH_IOCSR_IPI_STATUS);
 	/* Clear the ipi register to clear the interrupt */
 	iocsr_write32(action, LOONGARCH_IOCSR_IPI_CLEAR);
-	smp_mb();
+	wbflush();
 
 	return action;
 }
···
 	}
 
 	loongson_sysconf.nr_cpus = num_processors;
+	set_bit(0, &(loongson_sysconf.cores_io_master));
 #endif
 }
 
···
 {
 	int i = 0;
 
+	parse_acpi_topology();
+
 	for (i = 0; i < loongson_sysconf.nr_cpus; i++) {
 		set_cpu_present(i, true);
 		csr_mail_send(0, __cpu_logical_map[i], 0);
+		cpu_data[i].global_id = __cpu_logical_map[i];
 	}
 
 	per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
···
 	numa_add_cpu(cpu);
 #endif
 	per_cpu(cpu_state, cpu) = CPU_ONLINE;
-	cpu_data[cpu].core =
-		     cpu_logical_map(cpu) % loongson_sysconf.cores_per_package;
 	cpu_data[cpu].package =
 		     cpu_logical_map(cpu) / loongson_sysconf.cores_per_package;
+	cpu_data[cpu].core = pptt_enabled ? cpu_data[cpu].core :
+		     cpu_logical_map(cpu) % loongson_sysconf.cores_per_package;
 }
 
 void loongson_smp_finish(void)
···
 
 	cpumask_set_cpu(cpu, &cpu_sibling_setup_map);
 
-	if (smp_num_siblings <= 1)
-		cpumask_set_cpu(cpu, &cpu_sibling_map[cpu]);
-	else {
-		for_each_cpu(i, &cpu_sibling_setup_map) {
-			if (cpus_are_siblings(cpu, i)) {
-				cpumask_set_cpu(i, &cpu_sibling_map[cpu]);
-				cpumask_set_cpu(cpu, &cpu_sibling_map[i]);
-			}
+	for_each_cpu(i, &cpu_sibling_setup_map) {
+		if (cpus_are_siblings(cpu, i)) {
+			cpumask_set_cpu(i, &cpu_sibling_map[cpu]);
+			cpumask_set_cpu(cpu, &cpu_sibling_map[i]);
 		}
 	}
 }

arch/loongarch/kernel/traps.c

···
 #include <asm/tlb.h>
 #include <asm/types.h>
 #include <asm/unwind.h>
+#include <asm/uprobes.h>
 
 #include "access-helper.h"
 
···
 	if (regs->csr_prmd & CSR_PRMD_PIE)
 		local_irq_enable();
 
-	current->thread.trap_nr = read_csr_excode();
 	if (__get_inst(&opcode, (u32 *)era, user))
 		goto out_sigsegv;
 
···
 		else
 			break;
 	case BRK_UPROBE_BP:
-		if (notify_die(DIE_UPROBE, "Uprobe", regs, bcode,
-			       current->thread.trap_nr, SIGTRAP) == NOTIFY_STOP)
+		if (uprobe_breakpoint_handler(regs))
 			goto out;
 		else
 			break;
 	case BRK_UPROBE_XOLBP:
-		if (notify_die(DIE_UPROBE_XOL, "Uprobe_XOL", regs, bcode,
-			       current->thread.trap_nr, SIGTRAP) == NOTIFY_STOP)
+		if (uprobe_singlestep_handler(regs))
 			goto out;
 		else
 			break;
 	default:
+		current->thread.trap_nr = read_csr_excode();
 		if (notify_die(DIE_TRAP, "Break", regs, bcode,
 			       current->thread.trap_nr, SIGTRAP) == NOTIFY_STOP)
 			goto out;
···
 	BUG_ON(!is_fp_enabled());
 }
 
+static void init_restore_lsx(void)
+{
+	enable_lsx();
+
+	if (!thread_lsx_context_live()) {
+		/* First time LSX context user */
+		init_restore_fp();
+		init_lsx_upper();
+		set_thread_flag(TIF_LSX_CTX_LIVE);
+	} else {
+		if (!is_simd_owner()) {
+			if (is_fpu_owner()) {
+				restore_lsx_upper(current);
+			} else {
+				__own_fpu();
+				restore_lsx(current);
+			}
+		}
+	}
+
+	set_thread_flag(TIF_USEDSIMD);
+
+	BUG_ON(!is_fp_enabled());
+	BUG_ON(!is_lsx_enabled());
+}
+
+static void init_restore_lasx(void)
+{
+	enable_lasx();
+
+	if (!thread_lasx_context_live()) {
+		/* First time LASX context user */
+		init_restore_lsx();
+		init_lasx_upper();
+		set_thread_flag(TIF_LASX_CTX_LIVE);
+	} else {
+		if (is_fpu_owner() || is_simd_owner()) {
+			init_restore_lsx();
+			restore_lasx_upper(current);
+		} else {
+			__own_fpu();
+			enable_lsx();
+			restore_lasx(current);
+		}
+	}
+
+	set_thread_flag(TIF_USEDSIMD);
+
+	BUG_ON(!is_fp_enabled());
+	BUG_ON(!is_lsx_enabled());
+	BUG_ON(!is_lasx_enabled());
+}
+
 asmlinkage void noinstr do_fpu(struct pt_regs *regs)
 {
 	irqentry_state_t state = irqentry_enter(regs);
 
 	local_irq_enable();
 	die_if_kernel("do_fpu invoked from kernel context!", regs);
+	BUG_ON(is_lsx_enabled());
+	BUG_ON(is_lasx_enabled());
 
 	preempt_disable();
 	init_restore_fp();
···
 	irqentry_state_t state = irqentry_enter(regs);
 
 	local_irq_enable();
-	force_sig(SIGILL);
-	local_irq_disable();
+	if (!cpu_has_lsx) {
+		force_sig(SIGILL);
+		goto out;
+	}
 
+	die_if_kernel("do_lsx invoked from kernel context!", regs);
+	BUG_ON(is_lasx_enabled());
+
+	preempt_disable();
+	init_restore_lsx();
+	preempt_enable();
+
+out:
+	local_irq_disable();
 	irqentry_exit(regs, state);
 }
 
···
 	irqentry_state_t state = irqentry_enter(regs);
 
 	local_irq_enable();
-	force_sig(SIGILL);
-	local_irq_disable();
+	if (!cpu_has_lasx) {
+		force_sig(SIGILL);
+		goto out;
+	}
 
+	die_if_kernel("do_lasx invoked from kernel context!", regs);
+
+	preempt_disable();
+	init_restore_lasx();
+	preempt_enable();
+
+out:
+	local_irq_disable();
 	irqentry_exit(regs, state);
 }
 
···
 	/* For the moment, report the problem and hang. */
 	pr_err("Cache error exception:\n");
 	pr_err("csr_merrctl == %08x\n", csr_read32(LOONGARCH_CSR_MERRCTL));
-	pr_err("csr_merrera == %016llx\n", csr_read64(LOONGARCH_CSR_MERRERA));
+	pr_err("csr_merrera == %016lx\n", csr_read64(LOONGARCH_CSR_MERRERA));
 	panic("Can't handle the cache error!");
 }
 

arch/loongarch/kernel/unaligned.c

···
 	struct dentry *d;
 
 	d = debugfs_create_dir("loongarch", NULL);
-	if (IS_ERR_OR_NULL(d))
-		return -ENOMEM;
 
 	debugfs_create_u32("unaligned_instructions_user",
 				S_IRUGO, d, &unaligned_instructions_user);

arch/loongarch/kernel/uprobes.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/highmem.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/uprobes.h>
+#include <asm/cacheflush.h>
+
+#define UPROBE_TRAP_NR	UINT_MAX
+
+int arch_uprobe_analyze_insn(struct arch_uprobe *auprobe,
+			     struct mm_struct *mm, unsigned long addr)
+{
+	int idx;
+	union loongarch_instruction insn;
+
+	if (addr & 0x3)
+		return -EILSEQ;
+
+	for (idx = ARRAY_SIZE(auprobe->insn) - 1; idx >= 0; idx--) {
+		insn.word = auprobe->insn[idx];
+		if (insns_not_supported(insn))
+			return -EINVAL;
+	}
+
+	if (insns_need_simulation(insn)) {
+		auprobe->ixol[0] = larch_insn_gen_nop();
+		auprobe->simulate = true;
+	} else {
+		auprobe->ixol[0] = auprobe->insn[0];
+		auprobe->simulate = false;
+	}
+
+	auprobe->ixol[1] = UPROBE_XOLBP_INSN;
+
+	return 0;
+}
+
+int arch_uprobe_pre_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
+{
+	struct uprobe_task *utask = current->utask;
+
+	utask->autask.saved_trap_nr = current->thread.trap_nr;
+	current->thread.trap_nr = UPROBE_TRAP_NR;
+	instruction_pointer_set(regs, utask->xol_vaddr);
+	user_enable_single_step(current);
+
+	return 0;
+}
+
+int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
+{
+	struct uprobe_task *utask = current->utask;
+
+	WARN_ON_ONCE(current->thread.trap_nr != UPROBE_TRAP_NR);
+	current->thread.trap_nr = utask->autask.saved_trap_nr;
+
+	if (auprobe->simulate)
+		instruction_pointer_set(regs, auprobe->resume_era);
+	else
+		instruction_pointer_set(regs, utask->vaddr + LOONGARCH_INSN_SIZE);
+
+	user_disable_single_step(current);
+
+	return 0;
+}
+
+void arch_uprobe_abort_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
+{
+	struct uprobe_task *utask = current->utask;
+
+	current->thread.trap_nr = utask->autask.saved_trap_nr;
+	instruction_pointer_set(regs, utask->vaddr);
+	user_disable_single_step(current);
+}
+
+bool arch_uprobe_xol_was_trapped(struct task_struct *t)
+{
+	if (t->thread.trap_nr != UPROBE_TRAP_NR)
+		return true;
+
+	return false;
+}
+
+bool arch_uprobe_skip_sstep(struct arch_uprobe *auprobe, struct pt_regs *regs)
+{
+	union loongarch_instruction insn;
+
+	if (!auprobe->simulate)
+		return false;
+
+	insn.word = auprobe->insn[0];
+	arch_simulate_insn(insn, regs);
+	auprobe->resume_era = regs->csr_era;
+
+	return true;
+}
+
+unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr,
+						struct pt_regs *regs)
+{
+	unsigned long ra = regs->regs[1];
+
+	regs->regs[1] = trampoline_vaddr;
+
+	return ra;
+}
+
+bool arch_uretprobe_is_alive(struct return_instance *ret,
+			     enum rp_check ctx, struct pt_regs *regs)
+{
+	if (ctx == RP_CHECK_CHAIN_CALL)
+		return regs->regs[3] <= ret->stack;
+	else
+		return regs->regs[3] < ret->stack;
+}
+
+int arch_uprobe_exception_notify(struct notifier_block *self,
+				 unsigned long val, void *data)
+{
+	return NOTIFY_DONE;
+}
+
+bool uprobe_breakpoint_handler(struct pt_regs *regs)
+{
+	if (uprobe_pre_sstep_notifier(regs))
+		return true;
+
+	return false;
+}
+
+bool uprobe_singlestep_handler(struct pt_regs *regs)
+{
+	if (uprobe_post_sstep_notifier(regs))
+		return true;
+
+	return false;
+}
+
+unsigned long uprobe_get_swbp_addr(struct pt_regs *regs)
+{
+	return instruction_pointer(regs);
+}
+
+void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
+			   void *src, unsigned long len)
+{
+	void *kaddr = kmap_local_page(page);
+	void *dst = kaddr + (vaddr & ~PAGE_MASK);
+
+	memcpy(dst, src, len);
+	flush_icache_range((unsigned long)dst, (unsigned long)dst + len);
+	kunmap_local(kaddr);
+}

arch/loongarch/kernel/vdso.c

···
 #include <linux/random.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/time_namespace.h>
 #include <linux/timekeeper_internal.h>
 
 #include <asm/page.h>
···
 
 /* Kernel-provided data used by the VDSO. */
 static union {
-	u8 page[VDSO_DATA_SIZE];
+	u8 page[PAGE_SIZE];
+	struct vdso_data data[CS_BASES];
+} generic_vdso_data __page_aligned_data;
+
+static union {
+	u8 page[LOONGARCH_VDSO_DATA_SIZE];
 	struct loongarch_vdso_data vdata;
 } loongarch_vdso_data __page_aligned_data;
 
 static struct page *vdso_pages[] = { NULL };
-struct vdso_data *vdso_data = loongarch_vdso_data.vdata.data;
+struct vdso_data *vdso_data = generic_vdso_data.data;
 struct vdso_pcpu_data *vdso_pdata = loongarch_vdso_data.vdata.pdata;
 
 static int vdso_mremap(const struct vm_special_mapping *sm, struct vm_area_struct *new_vma)
···
 	current->mm->context.vdso = (void *)(new_vma->vm_start);
 
 	return 0;
+}
+
+static vm_fault_t vvar_fault(const struct vm_special_mapping *sm,
+			     struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+	unsigned long pfn;
+	struct page *timens_page = find_timens_vvar_page(vma);
+
+	switch (vmf->pgoff) {
+	case VVAR_GENERIC_PAGE_OFFSET:
+		if (!timens_page)
+			pfn = sym_to_pfn(vdso_data);
+		else
+			pfn = page_to_pfn(timens_page);
+		break;
+#ifdef CONFIG_TIME_NS
+	case VVAR_TIMENS_PAGE_OFFSET:
+		/*
+		 * If a task belongs to a time namespace then a namespace specific
+		 * VVAR is mapped with the VVAR_GENERIC_PAGE_OFFSET and the real
+		 * VVAR page is mapped with the VVAR_TIMENS_PAGE_OFFSET offset.
+		 * See also the comment near timens_setup_vdso_data().
+		 */
+		if (!timens_page)
+			return VM_FAULT_SIGBUS;
+		else
+			pfn = sym_to_pfn(vdso_data);
+		break;
+#endif /* CONFIG_TIME_NS */
+	case VVAR_LOONGARCH_PAGES_START ... VVAR_LOONGARCH_PAGES_END:
+		pfn = sym_to_pfn(&loongarch_vdso_data) + vmf->pgoff - VVAR_LOONGARCH_PAGES_START;
+		break;
+	default:
+		return VM_FAULT_SIGBUS;
+	}
+
+	return vmf_insert_pfn(vma, vmf->address, pfn);
 }
 
 struct loongarch_vdso_info vdso_info = {
···
 	},
 	.data_mapping = {
 		.name = "[vvar]",
+		.fault = vvar_fault,
 	},
 	.offset_sigreturn = vdso_offset_sigreturn,
 };
···
 }
 subsys_initcall(init_vdso);
 
+#ifdef CONFIG_TIME_NS
+struct vdso_data *arch_get_vdso_data(void *vvar_page)
+{
+	return (struct vdso_data *)(vvar_page);
+}
+
+/*
+ * The vvar mapping contains data for a specific time namespace, so when a
+ * task changes namespace we must unmap its vvar data for the old namespace.
+ * Subsequent faults will map in data for the new namespace.
+ *
+ * For more details see timens_setup_vdso_data().
+ */
+int vdso_join_timens(struct task_struct *task, struct time_namespace *ns)
+{
+	struct mm_struct *mm = task->mm;
+	struct vm_area_struct *vma;
+
+	VMA_ITERATOR(vmi, mm, 0);
+
+	mmap_read_lock(mm);
+	for_each_vma(vmi, vma) {
+		if (vma_is_special_mapping(vma, &vdso_info.data_mapping))
+			zap_vma_pages(vma);
+	}
+	mmap_read_unlock(mm);
+
+	return 0;
+}
+#endif
+
 static unsigned long vdso_base(void)
 {
 	unsigned long base = STACK_TOP;
···
 int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 {
 	int ret;
-	unsigned long vvar_size, size, data_addr, vdso_addr;
+	unsigned long size, data_addr, vdso_addr;
 	struct mm_struct *mm = current->mm;
 	struct vm_area_struct *vma;
 	struct loongarch_vdso_info *info = current->thread.vdso;
···
 	 * Determine total area size. This includes the VDSO data itself
 	 * and the data pages.
 	 */
-	vvar_size = VDSO_DATA_SIZE;
-	size = vvar_size + info->size;
+	size = VVAR_SIZE + info->size;
 
 	data_addr = get_unmapped_area(NULL, vdso_base(), size, 0, 0);
 	if (IS_ERR_VALUE(data_addr)) {
 		ret = data_addr;
 		goto out;
 	}
-	vdso_addr = data_addr + VDSO_DATA_SIZE;
 
-	vma = _install_special_mapping(mm, data_addr, vvar_size,
-				       VM_READ | VM_MAYREAD,
+	vma = _install_special_mapping(mm, data_addr, VVAR_SIZE,
+				       VM_READ | VM_MAYREAD | VM_PFNMAP,
 				       &info->data_mapping);
 	if (IS_ERR(vma)) {
 		ret = PTR_ERR(vma);
 		goto out;
 	}
 
-	/* Map VDSO data page. */
-	ret = remap_pfn_range(vma, data_addr,
-			      virt_to_phys(&loongarch_vdso_data) >> PAGE_SHIFT,
-			      vvar_size, PAGE_READONLY);
-	if (ret)
-		goto out;
-
-	/* Map VDSO code page. */
+	vdso_addr = data_addr + VVAR_SIZE;
 	vma = _install_special_mapping(mm, vdso_addr, info->size,
 				       VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC,
 				       &info->code_mapping);

arch/loongarch/kernel/vmlinux.lds.S

···
 	DWARF_DEBUG
 	ELF_DETAILS
 
+#ifdef CONFIG_EFI_STUB
+	/* header symbols */
+	_kernel_asize = _end - _text;
+	_kernel_fsize = _edata - _text;
+	_kernel_vsize = _end - __initdata_begin;
+	_kernel_rsize = _edata - __initdata_begin;
+	_kernel_offset = kernel_offset - _text;
+#endif
+
 	.gptab.sdata : {
 		*(.gptab.data)
 		*(.gptab.sdata)

arch/loongarch/lib/dump_tlb.c

···
 
 	pr_info("Index    : 0x%0x\n", read_csr_tlbidx());
 	pr_info("PageSize : 0x%0x\n", read_csr_pagesize());
-	pr_info("EntryHi  : 0x%0*llx\n", field, read_csr_entryhi());
-	pr_info("EntryLo0 : 0x%0*llx\n", field, read_csr_entrylo0());
-	pr_info("EntryLo1 : 0x%0*llx\n", field, read_csr_entrylo1());
+	pr_info("EntryHi  : 0x%0*lx\n", field, read_csr_entryhi());
+	pr_info("EntryLo0 : 0x%0*lx\n", field, read_csr_entrylo0());
+	pr_info("EntryLo1 : 0x%0*lx\n", field, read_csr_entrylo1());
 }
 
 static void dump_tlb(int first, int last)

arch/loongarch/mm/tlb.c

···
 	int idx;
 	unsigned long flags;
 
+	if (cpu_has_ptw)
+		return;
+
 	/*
 	 * Handle debugger faulting in for debugee.
 	 */
···
 	pwctl0 = pte_i | pte_w << 5 | pmd_i << 10 | pmd_w << 15 | pud_i << 20 | pud_w << 25;
 	pwctl1 = pgd_i | pgd_w << 6;
 
+	if (cpu_has_ptw)
+		pwctl1 |= CSR_PWCTL1_PTW;
+
 	csr_write64(pwctl0, LOONGARCH_CSR_PWCTL0);
 	csr_write64(pwctl1, LOONGARCH_CSR_PWCTL1);
 	csr_write64((long)swapper_pg_dir, LOONGARCH_CSR_PGDH);
···
 	if (cpu == 0) {
 		memcpy((void *)tlbrentry, handle_tlb_refill, 0x80);
 		local_flush_icache_range(tlbrentry, tlbrentry + 0x80);
-		set_handler(EXCCODE_TLBI * VECSIZE, handle_tlb_load, VECSIZE);
-		set_handler(EXCCODE_TLBL * VECSIZE, handle_tlb_load, VECSIZE);
-		set_handler(EXCCODE_TLBS * VECSIZE, handle_tlb_store, VECSIZE);
-		set_handler(EXCCODE_TLBM * VECSIZE, handle_tlb_modify, VECSIZE);
+		if (!cpu_has_ptw) {
+			set_handler(EXCCODE_TLBI * VECSIZE, handle_tlb_load, VECSIZE);
+			set_handler(EXCCODE_TLBL * VECSIZE, handle_tlb_load, VECSIZE);
+			set_handler(EXCCODE_TLBS * VECSIZE, handle_tlb_store, VECSIZE);
+			set_handler(EXCCODE_TLBM * VECSIZE, handle_tlb_modify, VECSIZE);
+		} else {
+			set_handler(EXCCODE_TLBI * VECSIZE, handle_tlb_load_ptw, VECSIZE);
+			set_handler(EXCCODE_TLBL * VECSIZE, handle_tlb_load_ptw, VECSIZE);
+			set_handler(EXCCODE_TLBS * VECSIZE, handle_tlb_store_ptw, VECSIZE);
+			set_handler(EXCCODE_TLBM * VECSIZE, handle_tlb_modify_ptw, VECSIZE);
+		}
 		set_handler(EXCCODE_TLBNR * VECSIZE, handle_tlb_protect, VECSIZE);
 		set_handler(EXCCODE_TLBNX * VECSIZE, handle_tlb_protect, VECSIZE);
 		set_handler(EXCCODE_TLBPE * VECSIZE, handle_tlb_protect, VECSIZE);

arch/loongarch/mm/tlbex.S

···
 	ertn
 
 nopage_tlb_load:
-	dbar		0
+	dbar		0x700
 	csrrd		ra, EXCEPTION_KS2
 	la_abs		t0, tlb_do_page_fault_0
 	jr		t0
 SYM_FUNC_END(handle_tlb_load)
+
+SYM_FUNC_START(handle_tlb_load_ptw)
+	csrwr		t0, LOONGARCH_CSR_KS0
+	csrwr		t1, LOONGARCH_CSR_KS1
+	la_abs		t0, tlb_do_page_fault_0
+	jr		t0
+SYM_FUNC_END(handle_tlb_load_ptw)
 
 SYM_FUNC_START(handle_tlb_store)
 	csrwr		t0, EXCEPTION_KS0
···
 	ertn
 
 nopage_tlb_store:
-	dbar		0
+	dbar		0x700
 	csrrd		ra, EXCEPTION_KS2
 	la_abs		t0, tlb_do_page_fault_1
 	jr		t0
 SYM_FUNC_END(handle_tlb_store)
+
+SYM_FUNC_START(handle_tlb_store_ptw)
+	csrwr		t0, LOONGARCH_CSR_KS0
+	csrwr		t1, LOONGARCH_CSR_KS1
+	la_abs		t0, tlb_do_page_fault_1
+	jr		t0
+SYM_FUNC_END(handle_tlb_store_ptw)
 
 SYM_FUNC_START(handle_tlb_modify)
 	csrwr		t0, EXCEPTION_KS0
···
 	ertn
 
 nopage_tlb_modify:
-	dbar		0
+	dbar		0x700
 	csrrd		ra, EXCEPTION_KS2
 	la_abs		t0, tlb_do_page_fault_1
 	jr		t0
 SYM_FUNC_END(handle_tlb_modify)
+
+SYM_FUNC_START(handle_tlb_modify_ptw)
+	csrwr		t0, LOONGARCH_CSR_KS0
+	csrwr		t1, LOONGARCH_CSR_KS1
+	la_abs		t0, tlb_do_page_fault_1
+	jr		t0
+SYM_FUNC_END(handle_tlb_modify_ptw)
 
 SYM_FUNC_START(handle_tlb_refill)
 	csrwr		t0, LOONGARCH_CSR_TLBRSAVE

arch/loongarch/power/suspend.c

···
 };
 static struct saved_registers saved_regs;
 
-static void arch_common_suspend(void)
+void loongarch_common_suspend(void)
 {
 	save_counter();
 	saved_regs.pgd = csr_read64(LOONGARCH_CSR_PGDL);
···
 	loongarch_suspend_addr = loongson_sysconf.suspend_addr;
 }
 
-static void arch_common_resume(void)
+void loongarch_common_resume(void)
 {
 	sync_counter();
 	local_flush_tlb_all();
···
 	enable_gpe_wakeup();
 	enable_pci_wakeup();
 
-	arch_common_suspend();
+	loongarch_common_suspend();
 
 	/* processor specific suspend */
 	loongarch_suspend_enter();
 
-	arch_common_resume();
+	loongarch_common_resume();
 
 	return 0;
 }

arch/loongarch/vdso/Makefile

···
 	$(filter -E%,$(KBUILD_CFLAGS)) \
 	$(filter -march=%,$(KBUILD_CFLAGS)) \
 	$(filter -m%-float,$(KBUILD_CFLAGS)) \
+	$(CLANG_FLAGS) \
 	-D__VDSO__
-
-ifeq ($(cc-name),clang)
-ccflags-vdso += $(filter --target=%,$(KBUILD_CFLAGS))
-endif
 
 cflags-vdso := $(ccflags-vdso) \
 	-isystem $(shell $(CC) -print-file-name=include) \
 	$(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
-	-O2 -g -fno-strict-aliasing -fno-common -fno-builtin -G0 \
+	-O2 -g -fno-strict-aliasing -fno-common -fno-builtin \
 	-fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \
 	$(call cc-option, -fno-asynchronous-unwind-tables) \
 	$(call cc-option, -fno-stack-protector)

arch/loongarch/vdso/vgetcpu.c

···
 
 static __always_inline const struct vdso_pcpu_data *get_pcpu_data(void)
 {
-	return (struct vdso_pcpu_data *)(get_vdso_base() - VDSO_DATA_SIZE);
+	return (struct vdso_pcpu_data *)(get_vdso_data() + VVAR_LOONGARCH_PAGES_START * PAGE_SIZE);
 }
 
 extern

drivers/acpi/Kconfig

···
 
 if ARM64
 source "drivers/acpi/arm64/Kconfig"
+endif
 
 config ACPI_PPTT
 	bool
-endif
 
 config ACPI_PCC
 	bool "ACPI PCC Address Space"

scripts/Makefile.clang

···
 CLANG_TARGET_FLAGS_arm		:= arm-linux-gnueabi
 CLANG_TARGET_FLAGS_arm64	:= aarch64-linux-gnu
 CLANG_TARGET_FLAGS_hexagon	:= hexagon-linux-musl
+CLANG_TARGET_FLAGS_loongarch	:= loongarch64-linux-gnusf
 CLANG_TARGET_FLAGS_m68k		:= m68k-linux-gnu
 CLANG_TARGET_FLAGS_mips		:= mipsel-linux-gnu
 CLANG_TARGET_FLAGS_powerpc	:= powerpc64le-linux-gnu