diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-30 08:52:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-30 08:52:28 -0700 |
| commit | 112e7e21519422b6f2bb0fa8061f5685e9757170 (patch) | |
| tree | f381b6b0032b7d5e63f56e06743545237834e440 | |
| parent | e55e5df193d247a38a5e1ac65a5316a0adcc22fa (diff) | |
| parent | 5ee35c769663cb1c5f26e12cad84904dc3002de8 (diff) | |
| download | livepatching-112e7e21519422b6f2bb0fa8061f5685e9757170.tar.gz | |
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
...
63 files changed, 2378 insertions, 368 deletions
diff --git a/Documentation/features/core/jump-labels/arch-support.txt b/Documentation/features/core/jump-labels/arch-support.txt index 2328eada3a491a..94d9dece580f18 100644 --- a/Documentation/features/core/jump-labels/arch-support.txt +++ b/Documentation/features/core/jump-labels/arch-support.txt @@ -13,7 +13,7 @@ | csky: | ok | | hexagon: | TODO | | ia64: | TODO | - | loongarch: | TODO | + | loongarch: | ok | | m68k: | TODO | | microblaze: | TODO | | mips: | ok | diff --git a/Documentation/features/debug/kmemleak/arch-support.txt b/Documentation/features/debug/kmemleak/arch-support.txt index 0cfa5f0e4db152..4e205ef7036354 100644 --- a/Documentation/features/debug/kmemleak/arch-support.txt +++ b/Documentation/features/debug/kmemleak/arch-support.txt @@ -13,7 +13,7 @@ | csky: | ok | | hexagon: | TODO | | ia64: | TODO | - | loongarch: | TODO | + | loongarch: | ok | | m68k: | TODO | | microblaze: | ok | | mips: | ok | diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 32b9da4622ce4e..0c7fb52727ba54 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -5,6 +5,7 @@ config LOONGARCH 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 @@ -49,6 +50,8 @@ config LOONGARCH 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 @@ -81,9 +84,12 @@ config LOONGARCH 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 @@ -91,6 +97,7 @@ config LOONGARCH 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 @@ -121,6 +128,7 @@ config LOONGARCH 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 @@ -163,14 +171,6 @@ config 32BIT 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 depends on BUG @@ -243,6 +243,15 @@ config SCHED_OMIT_FRAME_POINTER 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" source "kernel/Kconfig.hz" @@ -374,6 +383,13 @@ config EFI_STUB 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 @@ -483,6 +499,43 @@ config ARCH_STRICT_ALIGN 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 @@ -592,6 +645,9 @@ config ARCH_MMAP_RND_BITS_MIN config ARCH_MMAP_RND_BITS_MAX default 18 +config ARCH_SUPPORTS_UPROBES + def_bool y + menu "Power management options" config ARCH_SUSPEND_POSSIBLE diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile index a27e264bdaa5a2..09ba338a64dec4 100644 --- a/arch/loongarch/Makefile +++ b/arch/loongarch/Makefile @@ -46,8 +46,8 @@ ld-emul = $(64bit-emul) 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 @@ -56,13 +56,18 @@ LDFLAGS_vmlinux += -G0 -static -n -nostdlib # 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 @@ -107,7 +112,7 @@ KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include) 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 diff --git a/arch/loongarch/include/asm/Kbuild b/arch/loongarch/include/asm/Kbuild index 77ad8e6f0906c4..6b222f227342b4 100644 --- a/arch/loongarch/include/asm/Kbuild +++ b/arch/loongarch/include/asm/Kbuild @@ -5,7 +5,6 @@ generic-y += mcs_spinlock.h 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 diff --git a/arch/loongarch/include/asm/acpi.h b/arch/loongarch/include/asm/acpi.h index 976a810352c601..8de6c4b83a61a8 100644 --- a/arch/loongarch/include/asm/acpi.h +++ b/arch/loongarch/include/asm/acpi.h @@ -8,11 +8,14 @@ #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); @@ -30,6 +33,14 @@ static inline bool acpi_has_cpu_in_madt(void) } 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 */ @@ -37,12 +48,10 @@ extern struct list_head acpi_wakeup_device_list; 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; diff --git a/arch/loongarch/include/asm/asmmacro.h b/arch/loongarch/include/asm/asmmacro.h index c51a1b43acb445..79e1d53fea89cb 100644 --- a/arch/loongarch/include/asm/asmmacro.h +++ b/arch/loongarch/include/asm/asmmacro.h @@ -270,6 +270,399 @@ 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 diff --git a/arch/loongarch/include/asm/barrier.h b/arch/loongarch/include/asm/barrier.h index cda9776758544e..4b663f19770611 100644 --- a/arch/loongarch/include/asm/barrier.h +++ b/arch/loongarch/include/asm/barrier.h @@ -5,27 +5,56 @@ #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 DBAR(hint) __asm__ __volatile__("dbar %0 " : : "I"(hint) : "memory") + +#define crwrw 0b00000 +#define cr_r_ 0b00101 +#define c_w_w 0b01010 -#define fast_wmb() __sync() -#define fast_rmb() __sync() -#define fast_mb() __sync() -#define fast_iob() __sync() -#define wbflush() __sync() +#define orwrw 0b10000 +#define or_r_ 0b10101 +#define o_w_w 0b11010 -#define wmb() fast_wmb() -#define rmb() fast_rmb() -#define mb() fast_mb() -#define iob() fast_iob() +#define orw_w 0b10010 +#define or_rw 0b10100 -#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 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() @@ -59,68 +88,19 @@ static inline unsigned long array_index_mask_nospec(unsigned long index, 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) \ diff --git a/arch/loongarch/include/asm/cpu-features.h b/arch/loongarch/include/asm/cpu-features.h index f6177f13347767..2eafe6a6aca818 100644 --- a/arch/loongarch/include/asm/cpu-features.h +++ b/arch/loongarch/include/asm/cpu-features.h @@ -64,6 +64,6 @@ #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 */ diff --git a/arch/loongarch/include/asm/cpu-info.h b/arch/loongarch/include/asm/cpu-info.h index cd73a6f57fe37c..900589cb159de4 100644 --- a/arch/loongarch/include/asm/cpu-info.h +++ b/arch/loongarch/include/asm/cpu-info.h @@ -54,6 +54,7 @@ struct cpuinfo_loongarch { 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. */ diff --git a/arch/loongarch/include/asm/cpu.h b/arch/loongarch/include/asm/cpu.h index 88773d849e332f..48b9f7168bcca0 100644 --- a/arch/loongarch/include/asm/cpu.h +++ b/arch/loongarch/include/asm/cpu.h @@ -98,6 +98,7 @@ enum cpu_type_enum { #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) @@ -125,5 +126,6 @@ enum cpu_type_enum { #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 */ diff --git a/arch/loongarch/include/asm/fpregdef.h b/arch/loongarch/include/asm/fpregdef.h index b6be527831dd9c..e56610ae859275 100644 --- a/arch/loongarch/include/asm/fpregdef.h +++ b/arch/loongarch/include/asm/fpregdef.h @@ -40,6 +40,7 @@ #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. @@ -48,5 +49,11 @@ #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 */ diff --git a/arch/loongarch/include/asm/fpu.h b/arch/loongarch/include/asm/fpu.h index 192f8e35d9126b..e4193d637f664e 100644 --- a/arch/loongarch/include/asm/fpu.h +++ b/arch/loongarch/include/asm/fpu.h @@ -28,6 +28,26 @@ extern void _init_fpu(unsigned int); 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. @@ -44,6 +64,29 @@ static inline int is_fp_enabled(void) 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) #define disable_fpu() clear_csr_euen(CSR_EUEN_FPEN) @@ -81,9 +124,22 @@ static inline void own_fpu(int restore) 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); @@ -129,4 +185,127 @@ static inline union fpureg *get_fpu_regs(struct task_struct *tsk) 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 */ diff --git a/arch/loongarch/include/asm/gpr-num.h b/arch/loongarch/include/asm/gpr-num.h index e0941af20c7e77..996038da806d1b 100644 --- a/arch/loongarch/include/asm/gpr-num.h +++ b/arch/loongarch/include/asm/gpr-num.h @@ -9,6 +9,22 @@ .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 \ @@ -16,6 +32,20 @@ " .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__ */ diff --git a/arch/loongarch/include/asm/inst.h b/arch/loongarch/include/asm/inst.h index b09887ffcd15d8..71e1ed4165c80d 100644 --- a/arch/loongarch/include/asm/inst.h +++ b/arch/loongarch/include/asm/inst.h @@ -5,6 +5,7 @@ #ifndef _ASM_INST_H #define _ASM_INST_H +#include <linux/bitops.h> #include <linux/types.h> #include <asm/asm.h> #include <asm/ptrace.h> @@ -15,14 +16,22 @@ #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, @@ -178,6 +187,32 @@ enum reg3_op { 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, @@ -435,6 +470,10 @@ static inline bool is_self_loop_ins(union loongarch_instruction *ip, struct pt_r 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); @@ -443,13 +482,15 @@ u32 larch_insn_gen_nop(void); 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) { @@ -461,6 +502,16 @@ static inline bool unsigned_imm_check(unsigned 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, \ int offset) \ diff --git a/arch/loongarch/include/asm/io.h b/arch/loongarch/include/asm/io.h index 545e2708fbf704..1c94102200407f 100644 --- a/arch/loongarch/include/asm/io.h +++ b/arch/loongarch/include/asm/io.h @@ -62,7 +62,7 @@ extern pgprot_t pgprot_wc; #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. diff --git a/arch/loongarch/include/asm/jump_label.h b/arch/loongarch/include/asm/jump_label.h new file mode 100644 index 00000000000000..3cea299a5ef583 --- /dev/null +++ b/arch/loongarch/include/asm/jump_label.h @@ -0,0 +1,50 @@ +/* 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 */ diff --git a/arch/loongarch/include/asm/kdebug.h b/arch/loongarch/include/asm/kdebug.h index d721b4b82fae09..c00ed874bf0619 100644 --- a/arch/loongarch/include/asm/kdebug.h +++ b/arch/loongarch/include/asm/kdebug.h @@ -13,11 +13,6 @@ enum die_val { DIE_FP, DIE_SIMD, DIE_TRAP, - DIE_PAGE_FAULT, - DIE_BREAK, - DIE_SSTEPBP, - DIE_UPROBE, - DIE_UPROBE_XOL, }; #endif /* _ASM_LOONGARCH_KDEBUG_H */ diff --git a/arch/loongarch/include/asm/kprobes.h b/arch/loongarch/include/asm/kprobes.h index 798020ae02c694..60fa753a010d96 100644 --- a/arch/loongarch/include/asm/kprobes.h +++ b/arch/loongarch/include/asm/kprobes.h @@ -22,7 +22,7 @@ do { \ #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 { @@ -49,9 +49,6 @@ 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 */ static inline bool kprobe_breakpoint_handler(struct pt_regs *regs) { return false; } diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h index 1c2a0a2c883065..10748a20a2ab55 100644 --- a/arch/loongarch/include/asm/loongarch.h +++ b/arch/loongarch/include/asm/loongarch.h @@ -56,10 +56,7 @@ __asm__(".macro parse_r var r\n\t" #undef _IFC_REG /* CPUCFG */ -static inline u32 read_cpucfg(u32 reg) -{ - return __cpucfg(reg); -} +#define read_cpucfg(reg) __cpucfg(reg) #endif /* !__ASSEMBLY__ */ @@ -138,6 +135,7 @@ static inline u32 read_cpucfg(u32 reg) #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) @@ -206,56 +204,18 @@ static inline u32 read_cpucfg(u32 reg) #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__ */ @@ -453,6 +413,9 @@ static __always_inline void iocsr_write64(u64 val, u32 reg) #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) @@ -1441,11 +1404,18 @@ __BUILD_CSR_OP(tlbidx) #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 diff --git a/arch/loongarch/include/asm/module.h b/arch/loongarch/include/asm/module.h index 12a0f1e66916d0..2ecd82bb64e132 100644 --- a/arch/loongarch/include/asm/module.h +++ b/arch/loongarch/include/asm/module.h @@ -55,7 +55,7 @@ static inline struct plt_entry emit_plt_entry(unsigned long val) 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 }; } diff --git a/arch/loongarch/include/asm/page.h b/arch/loongarch/include/asm/page.h index fb5338b352e657..26e8dccb661909 100644 --- a/arch/loongarch/include/asm/page.h +++ b/arch/loongarch/include/asm/page.h @@ -81,6 +81,7 @@ typedef struct { unsigned long pgprot; } pgprot_t; #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)) diff --git a/arch/loongarch/include/asm/percpu.h b/arch/loongarch/include/asm/percpu.h index ad8d88494554a7..b9f567e6601668 100644 --- a/arch/loongarch/include/asm/percpu.h +++ b/arch/loongarch/include/asm/percpu.h @@ -14,7 +14,11 @@ * 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 */ diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h index 9a9f9ff9b70980..38afeb7dd58b6b 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -362,7 +362,7 @@ extern pgd_t invalid_pg_dir[]; */ 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) { @@ -506,7 +506,7 @@ static inline pmd_t pmd_wrprotect(pmd_t pmd) 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) diff --git a/arch/loongarch/include/asm/qspinlock.h b/arch/loongarch/include/asm/qspinlock.h new file mode 100644 index 00000000000000..34f43f8ad5912b --- /dev/null +++ b/arch/loongarch/include/asm/qspinlock.h @@ -0,0 +1,18 @@ +/* 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 */ diff --git a/arch/loongarch/include/asm/suspend.h b/arch/loongarch/include/asm/suspend.h new file mode 100644 index 00000000000000..4025c9d5d7cf04 --- /dev/null +++ b/arch/loongarch/include/asm/suspend.h @@ -0,0 +1,10 @@ +/* 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 diff --git a/arch/loongarch/include/asm/tlb.h b/arch/loongarch/include/asm/tlb.h index f5e4deb97402f7..da7a3b5b9374ae 100644 --- a/arch/loongarch/include/asm/tlb.h +++ b/arch/loongarch/include/asm/tlb.h @@ -88,52 +88,47 @@ enum invtlb_ops { 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" - : - : "r"(addr), "r"(info), "i"(op) + "invtlb %0, %1, %2\n\t" : + : "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" - : - : "r"(addr), "i"(op) + "invtlb %0, $zero, %1\n\t" : + : "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" - : - : "r"(info), "i"(op) + "invtlb %0, %1, $zero\n\t" : + : "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" ); } @@ -163,6 +158,9 @@ extern void handle_tlb_store(void); 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); diff --git a/arch/loongarch/include/asm/uprobes.h b/arch/loongarch/include/asm/uprobes.h new file mode 100644 index 00000000000000..c8f59983f702df --- /dev/null +++ b/arch/loongarch/include/asm/uprobes.h @@ -0,0 +1,36 @@ +/* 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 */ diff --git a/arch/loongarch/include/asm/vdso/gettimeofday.h b/arch/loongarch/include/asm/vdso/gettimeofday.h index 7b2cd37641e2a4..89e6b222c2f2d1 100644 --- a/arch/loongarch/include/asm/vdso/gettimeofday.h +++ b/arch/loongarch/include/asm/vdso/gettimeofday.h @@ -91,9 +91,16 @@ static inline bool loongarch_vdso_hres_capable(void) 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 */ diff --git a/arch/loongarch/include/asm/vdso/vdso.h b/arch/loongarch/include/asm/vdso/vdso.h index 3b55d32a0619cc..5a12309d9fb555 100644 --- a/arch/loongarch/include/asm/vdso/vdso.h +++ b/arch/loongarch/include/asm/vdso/vdso.h @@ -16,10 +16,33 @@ struct vdso_pcpu_data { 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) { @@ -34,10 +57,9 @@ 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__ */ diff --git a/arch/loongarch/include/uapi/asm/hwcap.h b/arch/loongarch/include/uapi/asm/hwcap.h index 8840b72fa8e8c5..6955a7cb2c65d1 100644 --- a/arch/loongarch/include/uapi/asm/hwcap.h +++ b/arch/loongarch/include/uapi/asm/hwcap.h @@ -16,5 +16,6 @@ #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 */ diff --git a/arch/loongarch/include/uapi/asm/ptrace.h b/arch/loongarch/include/uapi/asm/ptrace.h index 82d811b5c6e972..06e3be52cb0427 100644 --- a/arch/loongarch/include/uapi/asm/ptrace.h +++ b/arch/loongarch/include/uapi/asm/ptrace.h @@ -41,9 +41,19 @@ struct user_pt_regs { } __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 { diff --git a/arch/loongarch/include/uapi/asm/sigcontext.h b/arch/loongarch/include/uapi/asm/sigcontext.h index 52e49b8bf4be04..4cd7d16f703775 100644 --- a/arch/loongarch/include/uapi/asm/sigcontext.h +++ b/arch/loongarch/include/uapi/asm/sigcontext.h @@ -41,4 +41,22 @@ struct fpu_context { __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 */ diff --git a/arch/loongarch/kernel/Makefile b/arch/loongarch/kernel/Makefile index 9a72d91cd10497..8e279f04f9e7a8 100644 --- a/arch/loongarch/kernel/Makefile +++ b/arch/loongarch/kernel/Makefile @@ -28,6 +28,8 @@ ifdef CONFIG_FUNCTION_TRACER 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 @@ -52,6 +54,10 @@ obj-$(CONFIG_UNWINDER_PROLOGUE) += unwind_prologue.o obj-$(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) diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c index 98f431157e4c1c..9450e09073ebf7 100644 --- a/arch/loongarch/kernel/acpi.c +++ b/arch/loongarch/kernel/acpi.c @@ -33,6 +33,8 @@ u64 acpi_saved_sp; #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) { @@ -99,6 +101,7 @@ acpi_parse_processor(union acpi_subtable_headers *header, const unsigned long en 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 @@ -140,6 +143,35 @@ static void __init acpi_process_madt(void) 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 int (*acpi_suspend_lowlevel)(void); #else diff --git a/arch/loongarch/kernel/cpu-probe.c b/arch/loongarch/kernel/cpu-probe.c index 5adf0f736c6d74..e925579c7a71ea 100644 --- a/arch/loongarch/kernel/cpu-probe.c +++ b/arch/loongarch/kernel/cpu-probe.c @@ -116,6 +116,18 @@ static void cpu_probe_common(struct cpuinfo_loongarch *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; @@ -124,6 +136,10 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c) 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; elf_hwcap |= HWCAP_LOONGARCH_LVZ; diff --git a/arch/loongarch/kernel/efi-header.S b/arch/loongarch/kernel/efi-header.S index 8c1d229a2afa10..5f23b85d78cad8 100644 --- a/arch/loongarch/kernel/efi-header.S +++ b/arch/loongarch/kernel/efi-header.S @@ -24,7 +24,7 @@ .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 */ @@ -79,9 +79,9 @@ 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 */ diff --git a/arch/loongarch/kernel/fpu.S b/arch/loongarch/kernel/fpu.S index ccde94140c896d..f3df5f0a450941 100644 --- a/arch/loongarch/kernel/fpu.S +++ b/arch/loongarch/kernel/fpu.S @@ -145,6 +145,154 @@ 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. */ @@ -166,6 +314,76 @@ SYM_FUNC_START(_restore_fp) 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 * the property that no matter whether considered as single or as double @@ -244,6 +462,58 @@ SYM_FUNC_START(_restore_fp_context) 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 jr ra diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S index aa64b179744f52..5e828a8bc0a0e0 100644 --- a/arch/loongarch/kernel/head.S +++ b/arch/loongarch/kernel/head.S @@ -23,7 +23,7 @@ _head: .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 @@ -32,9 +32,9 @@ _head: 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 diff --git a/arch/loongarch/kernel/inst.c b/arch/loongarch/kernel/inst.c index 258ef267cd306f..3050329556d118 100644 --- a/arch/loongarch/kernel/inst.c +++ b/arch/loongarch/kernel/inst.c @@ -133,6 +133,51 @@ void simu_branch(struct pt_regs *regs, union loongarch_instruction insn) } } +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; @@ -208,6 +253,20 @@ u32 larch_insn_gen_bl(unsigned long pc, unsigned long dest) 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; @@ -226,6 +285,11 @@ u32 larch_insn_gen_lu12iw(enum loongarch_gpr rd, int imm) { 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; @@ -235,6 +299,11 @@ 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); return insn.word; @@ -244,16 +313,26 @@ u32 larch_insn_gen_lu52id(enum loongarch_gpr rd, enum loongarch_gpr rj, int 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; } diff --git a/arch/loongarch/kernel/jump_label.c b/arch/loongarch/kernel/jump_label.c new file mode 100644 index 00000000000000..31891214b767e7 --- /dev/null +++ b/arch/loongarch/kernel/jump_label.c @@ -0,0 +1,22 @@ +// 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); +} diff --git a/arch/loongarch/kernel/kprobes.c b/arch/loongarch/kernel/kprobes.c index 56c8c4b09a4299..17b040bd6067c5 100644 --- a/arch/loongarch/kernel/kprobes.c +++ b/arch/loongarch/kernel/kprobes.c @@ -4,69 +4,16 @@ #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); @@ -79,17 +26,20 @@ NOKPROBE_SYMBOL(arch_prepare_simulate); 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(); @@ -110,7 +60,7 @@ NOKPROBE_SYMBOL(arch_prepare_kprobe); /* 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); @@ -205,6 +155,8 @@ NOKPROBE_SYMBOL(post_kprobe_handler); 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); @@ -220,7 +172,8 @@ static void setup_singlestep(struct kprobe *p, struct pt_regs *regs, 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); } @@ -295,7 +248,7 @@ bool kprobe_breakpoint_handler(struct pt_regs *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 @@ -378,27 +331,6 @@ int __init arch_init_kprobes(void) 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) { return 0; diff --git a/arch/loongarch/kernel/proc.c b/arch/loongarch/kernel/proc.c index 0d82907b5404c3..0d33cbc47e5110 100644 --- a/arch/loongarch/kernel/proc.c +++ b/arch/loongarch/kernel/proc.c @@ -49,6 +49,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) 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); @@ -79,6 +80,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) 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"); diff --git a/arch/loongarch/kernel/process.c b/arch/loongarch/kernel/process.c index b71e17c1cc0c09..2e04eb07abb6e0 100644 --- a/arch/loongarch/kernel/process.c +++ b/arch/loongarch/kernel/process.c @@ -117,8 +117,14 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) */ 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(); @@ -285,7 +291,7 @@ unsigned long stack_top(void) /* 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) diff --git a/arch/loongarch/kernel/ptrace.c b/arch/loongarch/kernel/ptrace.c index 5fcffb45236764..a0767c3a0f0a95 100644 --- a/arch/loongarch/kernel/ptrace.c +++ b/arch/loongarch/kernel/ptrace.c @@ -250,6 +250,90 @@ static int cfg_set(struct task_struct *target, 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 /* @@ -708,6 +792,12 @@ enum loongarch_regset { 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, @@ -739,6 +829,26 @@ static const struct user_regset loongarch64_regsets[] = { .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, diff --git a/arch/loongarch/kernel/rethook.c b/arch/loongarch/kernel/rethook.c new file mode 100644 index 00000000000000..db1c5f5024fd5a --- /dev/null +++ b/arch/loongarch/kernel/rethook.c @@ -0,0 +1,28 @@ +// 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); diff --git a/arch/loongarch/kernel/rethook.h b/arch/loongarch/kernel/rethook.h new file mode 100644 index 00000000000000..3f1c1edf0d0b29 --- /dev/null +++ b/arch/loongarch/kernel/rethook.h @@ -0,0 +1,8 @@ +/* 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 diff --git a/arch/loongarch/kernel/kprobes_trampoline.S b/arch/loongarch/kernel/rethook_trampoline.S index af94b0d213fa95..bd5772c963382f 100644 --- a/arch/loongarch/kernel/kprobes_trampoline.S +++ b/arch/loongarch/kernel/rethook_trampoline.S @@ -75,7 +75,7 @@ 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 @@ -84,7 +84,7 @@ SYM_CODE_START(__kretprobe_trampoline) move a0, sp /* pt_regs */ - bl trampoline_probe_handler + bl arch_rethook_trampoline_callback /* use the result as the return-address */ move ra, a0 @@ -93,4 +93,4 @@ SYM_CODE_START(__kretprobe_trampoline) addi.d sp, sp, PT_SIZE jr ra -SYM_CODE_END(__kretprobe_trampoline) +SYM_CODE_END(arch_rethook_trampoline) diff --git a/arch/loongarch/kernel/signal.c b/arch/loongarch/kernel/signal.c index 8f5b7986374b52..ceb899366c0a7b 100644 --- a/arch/loongarch/kernel/signal.c +++ b/arch/loongarch/kernel/signal.c @@ -50,6 +50,14 @@ extern asmlinkage int _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; @@ -65,6 +73,8 @@ struct extctx_layout { unsigned long size; unsigned int flags; struct _ctx_layout fpu; + struct _ctx_layout lsx; + struct _ctx_layout lasx; struct _ctx_layout end; }; @@ -115,6 +125,96 @@ static int copy_fpu_from_sigcontext(struct fpu_context __user *ctx) 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(¤t->thread.fpu.fpr[i], 0), + ®s[2*i]); + err |= __put_user(get_fpr64(¤t->thread.fpu.fpr[i], 1), + ®s[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, ®s[2*i]); + set_fpr64(¤t->thread.fpu.fpr[i], 0, fpr_val); + err |= __get_user(fpr_val, ®s[2*i+1]); + set_fpr64(¤t->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(¤t->thread.fpu.fpr[i], 0), + ®s[4*i]); + err |= __put_user(get_fpr64(¤t->thread.fpu.fpr[i], 1), + ®s[4*i+1]); + err |= __put_user(get_fpr64(¤t->thread.fpu.fpr[i], 2), + ®s[4*i+2]); + err |= __put_user(get_fpr64(¤t->thread.fpu.fpr[i], 3), + ®s[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, ®s[4*i]); + set_fpr64(¤t->thread.fpu.fpr[i], 0, fpr_val); + err |= __get_user(fpr_val, ®s[4*i+1]); + set_fpr64(¤t->thread.fpu.fpr[i], 1, fpr_val); + err |= __get_user(fpr_val, ®s[4*i+2]); + set_fpr64(¤t->thread.fpu.fpr[i], 2, fpr_val); + err |= __get_user(fpr_val, ®s[4*i+3]); + set_fpr64(¤t->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. */ @@ -136,6 +236,42 @@ static int restore_hw_fpu_context(struct fpu_context __user *ctx) 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) { int err, sig = 0; @@ -227,6 +363,162 @@ static int protected_restore_fpu_context(struct extctx_layout *extctx) 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, ®s[0]) | + __put_user(0, ®s[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, ®s[0]) | + __get_user(tmp, ®s[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, ®s[0]) | + __put_user(0, ®s[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, ®s[0]) | + __get_user(tmp, ®s[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) { @@ -240,7 +532,11 @@ static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, 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 */ @@ -274,6 +570,20 @@ static int parse_extcontext(struct sigcontext __user *sc, struct extctx_layout * 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: goto invalid; } @@ -319,7 +629,11 @@ static int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc 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: @@ -375,7 +689,13 @@ static unsigned long setup_extcontext(struct extctx_layout *extctx, unsigned lon 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); } diff --git a/arch/loongarch/kernel/smp.c b/arch/loongarch/kernel/smp.c index ed167e244cdae0..8ea1bbcf13a7e3 100644 --- a/arch/loongarch/kernel/smp.c +++ b/arch/loongarch/kernel/smp.c @@ -8,6 +8,7 @@ * 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> @@ -37,10 +38,6 @@ EXPORT_SYMBOL(__cpu_number_map); 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; EXPORT_SYMBOL(cpu_sibling_map); @@ -118,7 +115,7 @@ static u32 ipi_read_clear(int cpu) 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; } @@ -210,6 +207,7 @@ static void __init fdt_smp_setup(void) } loongson_sysconf.nr_cpus = num_processors; + set_bit(0, &(loongson_sysconf.cores_io_master)); #endif } @@ -228,9 +226,12 @@ void __init loongson_prepare_cpus(unsigned int max_cpus) { 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; @@ -271,10 +272,10 @@ void loongson_init_secondary(void) 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) @@ -380,14 +381,10 @@ static inline void set_cpu_sibling_map(int cpu) 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]); } } } diff --git a/arch/loongarch/kernel/traps.c b/arch/loongarch/kernel/traps.c index 8db26e4ca447f5..8fb5e7a7714507 100644 --- a/arch/loongarch/kernel/traps.c +++ b/arch/loongarch/kernel/traps.c @@ -47,6 +47,7 @@ #include <asm/tlb.h> #include <asm/types.h> #include <asm/unwind.h> +#include <asm/uprobes.h> #include "access-helper.h" @@ -689,7 +690,6 @@ asmlinkage void noinstr do_bp(struct pt_regs *regs) 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; @@ -711,18 +711,17 @@ asmlinkage void noinstr do_bp(struct pt_regs *regs) 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; @@ -852,12 +851,67 @@ static void init_restore_fp(void) 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(); @@ -872,9 +926,20 @@ asmlinkage void noinstr do_lsx(struct pt_regs *regs) 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); } @@ -883,9 +948,19 @@ asmlinkage void noinstr do_lasx(struct pt_regs *regs) 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); } @@ -924,7 +999,7 @@ asmlinkage void cache_parity_error(void) /* 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!"); } diff --git a/arch/loongarch/kernel/unaligned.c b/arch/loongarch/kernel/unaligned.c index 85fae3d2d71aeb..3abf163dda056b 100644 --- a/arch/loongarch/kernel/unaligned.c +++ b/arch/loongarch/kernel/unaligned.c @@ -485,8 +485,6 @@ static int __init debugfs_unaligned(void) 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); diff --git a/arch/loongarch/kernel/uprobes.c b/arch/loongarch/kernel/uprobes.c new file mode 100644 index 00000000000000..87abc7137b738e --- /dev/null +++ b/arch/loongarch/kernel/uprobes.c @@ -0,0 +1,153 @@ +// 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); +} diff --git a/arch/loongarch/kernel/vdso.c b/arch/loongarch/kernel/vdso.c index eaebd2e0f72565..14941e4be66d82 100644 --- a/arch/loongarch/kernel/vdso.c +++ b/arch/loongarch/kernel/vdso.c @@ -14,6 +14,7 @@ #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> @@ -26,12 +27,17 @@ extern char vdso_start[], vdso_end[]; /* 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) @@ -41,6 +47,43 @@ static int vdso_mremap(const struct vm_special_mapping *sm, struct vm_area_struc 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 = { .vdso = vdso_start, .size = PAGE_SIZE, @@ -51,6 +94,7 @@ struct loongarch_vdso_info vdso_info = { }, .data_mapping = { .name = "[vvar]", + .fault = vvar_fault, }, .offset_sigreturn = vdso_offset_sigreturn, }; @@ -73,6 +117,37 @@ static int __init init_vdso(void) } 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; @@ -88,7 +163,7 @@ static unsigned long vdso_base(void) 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; @@ -100,32 +175,23 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) * 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); diff --git a/arch/loongarch/kernel/vmlinux.lds.S b/arch/loongarch/kernel/vmlinux.lds.S index 0c7b041be9d8de..b1686afcf87666 100644 --- a/arch/loongarch/kernel/vmlinux.lds.S +++ b/arch/loongarch/kernel/vmlinux.lds.S @@ -136,6 +136,15 @@ SECTIONS 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) diff --git a/arch/loongarch/lib/dump_tlb.c b/arch/loongarch/lib/dump_tlb.c index c2cc7ce343c9bb..0b886a6e260faf 100644 --- a/arch/loongarch/lib/dump_tlb.c +++ b/arch/loongarch/lib/dump_tlb.c @@ -20,9 +20,9 @@ void dump_tlb_regs(void) 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) diff --git a/arch/loongarch/mm/tlb.c b/arch/loongarch/mm/tlb.c index 8bad6b0cff59b9..00bb563e3c8947 100644 --- a/arch/loongarch/mm/tlb.c +++ b/arch/loongarch/mm/tlb.c @@ -167,6 +167,9 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t *ptep int idx; unsigned long flags; + if (cpu_has_ptw) + return; + /* * Handle debugger faulting in for debugee. */ @@ -222,6 +225,9 @@ static void setup_ptwalker(void) 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); @@ -264,10 +270,17 @@ void setup_tlb_handler(int cpu) 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); diff --git a/arch/loongarch/mm/tlbex.S b/arch/loongarch/mm/tlbex.S index 244e2f5aeee564..4ad78703de6f4c 100644 --- a/arch/loongarch/mm/tlbex.S +++ b/arch/loongarch/mm/tlbex.S @@ -184,12 +184,19 @@ tlb_huge_update_load: 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 csrwr t1, EXCEPTION_KS1 @@ -333,12 +340,19 @@ tlb_huge_update_store: 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 csrwr t1, EXCEPTION_KS1 @@ -480,12 +494,19 @@ tlb_huge_update_modify: 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 csrrd t0, LOONGARCH_CSR_PGD diff --git a/arch/loongarch/power/suspend.c b/arch/loongarch/power/suspend.c index 5e19733e5e05f4..166d9e06a64bdf 100644 --- a/arch/loongarch/power/suspend.c +++ b/arch/loongarch/power/suspend.c @@ -27,7 +27,7 @@ struct saved_registers { }; 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); @@ -40,7 +40,7 @@ static void arch_common_suspend(void) loongarch_suspend_addr = loongson_sysconf.suspend_addr; } -static void arch_common_resume(void) +void loongarch_common_resume(void) { sync_counter(); local_flush_tlb_all(); @@ -62,12 +62,12 @@ int loongarch_acpi_suspend(void) 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; } diff --git a/arch/loongarch/vdso/Makefile b/arch/loongarch/vdso/Makefile index 461240ab44365f..a50308b6fc2590 100644 --- a/arch/loongarch/vdso/Makefile +++ b/arch/loongarch/vdso/Makefile @@ -12,16 +12,13 @@ ccflags-vdso := \ $(filter -E%,$(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) diff --git a/arch/loongarch/vdso/vgetcpu.c b/arch/loongarch/vdso/vgetcpu.c index e02e775f536081..9e445be39763ae 100644 --- a/arch/loongarch/vdso/vgetcpu.c +++ b/arch/loongarch/vdso/vgetcpu.c @@ -21,7 +21,7 @@ static __always_inline int read_cpu_id(void) 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 diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index ccbeab9500ecb0..00dd309b668281 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -542,10 +542,10 @@ config ACPI_PFRUT if ARM64 source "drivers/acpi/arm64/Kconfig" +endif config ACPI_PPTT bool -endif config ACPI_PCC bool "ACPI PCC Address Space" diff --git a/scripts/Makefile.clang b/scripts/Makefile.clang index 9076cc939e8740..9a0aebf2ae6037 100644 --- a/scripts/Makefile.clang +++ b/scripts/Makefile.clang @@ -4,6 +4,7 @@ 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 |