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x86/ibt,sev: Annotations

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No IBT on AMD so far.. probably correct, who knows.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154318.995109889@infradead.org
This commit is contained in:
Peter Zijlstra 2022-03-08 16:30:42 +01:00
parent 3215de84c0
commit e8d61bdf0f
3 changed files with 4 additions and 0 deletions
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1
arch/x86/entry/entry_64.S
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@ -95,6 +95,7 @@ SYM_CODE_START(entry_SYSCALL_64)
movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp
SYM_INNER_LABEL(entry_SYSCALL_64_safe_stack, SYM_L_GLOBAL)
ANNOTATE_NOENDBR
/* Construct struct pt_regs on stack */
pushq $__USER_DS /* pt_regs->ss */

1
arch/x86/entry/entry_64_compat.S
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@ -214,6 +214,7 @@ SYM_CODE_START(entry_SYSCALL_compat)
movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp
SYM_INNER_LABEL(entry_SYSCALL_compat_safe_stack, SYM_L_GLOBAL)
ANNOTATE_NOENDBR
/* Construct struct pt_regs on stack */
pushq $__USER32_DS /* pt_regs->ss */

2
arch/x86/kernel/head_64.S
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@ -332,6 +332,7 @@ SYM_CODE_END(start_cpu0)
*/
SYM_CODE_START_NOALIGN(vc_boot_ghcb)
UNWIND_HINT_IRET_REGS offset=8
ENDBR
/* Build pt_regs */
PUSH_AND_CLEAR_REGS
@ -439,6 +440,7 @@ SYM_CODE_END(early_idt_handler_common)
*/
SYM_CODE_START_NOALIGN(vc_no_ghcb)
UNWIND_HINT_IRET_REGS offset=8
ENDBR
/* Build pt_regs */
PUSH_AND_CLEAR_REGS