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| author |   Lai Jiangshan <jiangshan.ljs@antgroup.com> | 2022-04-21 22:10:51 +0800 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2022-05-03 12:17:16 +0200 |
| commit | c64cc2802a784ecfd25d39945e57e7a147854a5b (patch) | |
| tree | 47b7c502d256eacb6b5a59e0c67a1d574de5620d /arch/x86/entry/entry_64.S | |
| parent | x86/entry: Move PUSH_AND_CLEAR_REGS out of error_entry() (diff) | |
| download | linux-dev-c64cc2802a784ecfd25d39945e57e7a147854a5b.tar.xz linux-dev-c64cc2802a784ecfd25d39945e57e7a147854a5b.zip | |
x86/entry: Move CLD to the start of the idtentry macro
Move it after CLAC.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220503032107.680190-5-jiangshanlai@gmail.com
Diffstat (limited to 'arch/x86/entry/entry_64.S')
| -rw-r--r-- | arch/x86/entry/entry_64.S | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index b1cef3b0a7ab..ab6ab6d3dab5 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -371,6 +371,7 @@ SYM_CODE_START(\asmsym) UNWIND_HINT_IRET_REGS offset=\has_error_code*8 ENDBR ASM_CLAC + cld .if \has_error_code == 0 pushq $-1 /* ORIG_RAX: no syscall to restart */ @@ -439,6 +440,7 @@ SYM_CODE_START(\asmsym) UNWIND_HINT_IRET_REGS ENDBR ASM_CLAC + cld pushq $-1 /* ORIG_RAX: no syscall to restart */ @@ -495,6 +497,7 @@ SYM_CODE_START(\asmsym) UNWIND_HINT_IRET_REGS ENDBR ASM_CLAC + cld /* * If the entry is from userspace, switch stacks and treat it as @@ -557,6 +560,7 @@ SYM_CODE_START(\asmsym) UNWIND_HINT_IRET_REGS offset=8 ENDBR ASM_CLAC + cld /* paranoid_entry returns GS information for paranoid_exit in EBX. */ call paranoid_entry @@ -882,7 +886,6 @@ SYM_CODE_END(xen_failsafe_callback) */ SYM_CODE_START_LOCAL(paranoid_entry) UNWIND_HINT_FUNC - cld PUSH_AND_CLEAR_REGS save_ret=1 ENCODE_FRAME_POINTER 8 @@ -1000,7 +1003,6 @@ SYM_CODE_END(paranoid_exit) */ SYM_CODE_START_LOCAL(error_entry) UNWIND_HINT_FUNC - cld testb $3, CS+8(%rsp) jz .Lerror_kernelspace @@ -1134,6 +1136,7 @@ SYM_CODE_START(asm_exc_nmi) */ ASM_CLAC + cld /* Use %rdx as our temp variable throughout */ pushq %rdx @@ -1153,7 +1156,6 @@ SYM_CODE_START(asm_exc_nmi) */ swapgs - cld FENCE_SWAPGS_USER_ENTRY SWITCH_TO_KERNEL_CR3 scratch_reg=%rdx movq %rsp, %rdx |