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| author | Qi Hu <huqi@loongson.cn> | 2023-09-06 22:53:55 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-09-06 22:53:55 +0800 |
| commit | bd3c5798484aa9a08302a844d7a75a2ee3b53d05 (patch) | |
| tree | 338b637a5062d6a6e97b342691b2969a4ef3bd80 /arch/loongarch/include/uapi/asm | |
| parent | f2091321044d9fbcadb93dfc1c9cf23e563ea40c (diff) | |
| download | lwn-bd3c5798484aa9a08302a844d7a75a2ee3b53d05.tar.gz lwn-bd3c5798484aa9a08302a844d7a75a2ee3b53d05.zip | |
LoongArch: Add Loongson Binary Translation (LBT) extension support
Loongson Binary Translation (LBT) is used to accelerate binary translation,
which contains 4 scratch registers (scr0 to scr3), x86/ARM eflags (eflags)
and x87 fpu stack pointer (ftop).
This patch support kernel to save/restore these registers, handle the LBT
exception and maintain sigcontext.
Signed-off-by: Qi Hu <huqi@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/uapi/asm')
| -rw-r--r-- | arch/loongarch/include/uapi/asm/ptrace.h | 6 | ||||
| -rw-r--r-- | arch/loongarch/include/uapi/asm/sigcontext.h | 10 |
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/loongarch/include/uapi/asm/ptrace.h b/arch/loongarch/include/uapi/asm/ptrace.h index 06e3be52cb04..ac915f841650 100644 --- a/arch/loongarch/include/uapi/asm/ptrace.h +++ b/arch/loongarch/include/uapi/asm/ptrace.h @@ -56,6 +56,12 @@ struct user_lasx_state { uint64_t vregs[32*4]; }; +struct user_lbt_state { + uint64_t scr[4]; + uint32_t eflags; + uint32_t ftop; +}; + struct user_watch_state { uint64_t dbg_info; struct { diff --git a/arch/loongarch/include/uapi/asm/sigcontext.h b/arch/loongarch/include/uapi/asm/sigcontext.h index 4cd7d16f7037..6c22f616b8f1 100644 --- a/arch/loongarch/include/uapi/asm/sigcontext.h +++ b/arch/loongarch/include/uapi/asm/sigcontext.h @@ -59,4 +59,14 @@ struct lasx_context { __u32 fcsr; }; +/* LBT context */ +#define LBT_CTX_MAGIC 0x42540001 +#define LBT_CTX_ALIGN 8 +struct lbt_context { + __u64 regs[4]; + __u32 eflags; + __u32 ftop; +}; + + #endif /* _UAPI_ASM_SIGCONTEXT_H */ |