Messages in this thread Patch in this message | | | From | Lai Jiangshan <> | Subject | [PATCH V2 32/41] x86/nmi: Use C entry code | Date | Sun, 26 Sep 2021 23:08:29 +0800 |
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From: Lai Jiangshan <laijs@linux.alibaba.com>
Use DEFINE_IDTENTRY_IST_ETNRY to emit C entry function and use the function directly in entry_64.S.
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> --- arch/x86/entry/entry_64.S | 17 ++--------------- arch/x86/include/asm/idtentry.h | 5 ++++- 2 files changed, 6 insertions(+), 16 deletions(-)
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 0ba788bb9857..72a1610bb540 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -1271,21 +1271,8 @@ end_repeat_nmi: PUSH_AND_CLEAR_REGS ENCODE_FRAME_POINTER - /* - * Use paranoid_entry to handle SWAPGS and CR3. - */ - call paranoid_entry - UNWIND_HINT_REGS - - movq %rsp, %rdi - movq $-1, %rsi - call exc_nmi - - /* - * Use paranoid_exit to handle SWAPGS and CR3, but no need to use - * restore_regs_and_return_to_kernel as we must handle nested NMI. - */ - call paranoid_exit + movq %rsp, %rdi /* pt_regs pointer */ + call ist_exc_nmi POP_REGS diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h index 49c0ebe374ae..c99c58bc179a 100644 --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -358,6 +358,8 @@ __visible __entry_text void ist_##func(struct pt_regs *regs) \ #define DEFINE_IDTENTRY_NOIST(func) \ DEFINE_IDTENTRY_RAW(noist_##func) +#define DEFINE_IDTENTRY_NMI DEFINE_IDTENTRY_IST + #define DECLARE_IDTENTRY_MCE DECLARE_IDTENTRY_IST #define DEFINE_IDTENTRY_MCE DEFINE_IDTENTRY_IST #define DEFINE_IDTENTRY_MCE_USER DEFINE_IDTENTRY_NOIST @@ -407,6 +409,8 @@ __visible __entry_text void ist_##func(struct pt_regs *regs) \ #else /* CONFIG_X86_64 */ +#define DEFINE_IDTENTRY_NMI DEFINE_IDTENTRY_RAW + /** * DECLARE_IDTENTRY_DF - Declare functions for double fault 32bit variant * @vector: Vector number (ignored for C) @@ -438,7 +442,6 @@ __visible noinstr void func(struct pt_regs *regs, \ /* C-Code mapping */ #define DECLARE_IDTENTRY_NMI DECLARE_IDTENTRY_RAW -#define DEFINE_IDTENTRY_NMI DEFINE_IDTENTRY_RAW #else /* !__ASSEMBLY__ */ -- 2.19.1.6.gb485710b
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