Messages in this thread Patch in this message | | | From | Josh Poimboeuf <> | Subject | [PATCH v3 11/20] x86/srso: Improve i-cache locality for alias mitigation | Date | Mon, 4 Sep 2023 22:04:55 -0700 |
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Move srso_alias_return_thunk() to the same section as srso_alias_safe_ret() so they can share a cache line.
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> --- arch/x86/lib/retpoline.S | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/x86/lib/retpoline.S b/arch/x86/lib/retpoline.S index cd86aeb5fdd3..9ab634f0b5d2 100644 --- a/arch/x86/lib/retpoline.S +++ b/arch/x86/lib/retpoline.S @@ -177,15 +177,14 @@ SYM_START(srso_alias_safe_ret, SYM_L_GLOBAL, SYM_A_NONE) int3 SYM_FUNC_END(srso_alias_safe_ret) - .section .text..__x86.return_thunk - -SYM_CODE_START(srso_alias_return_thunk) +SYM_CODE_START_NOALIGN(srso_alias_return_thunk) UNWIND_HINT_FUNC ANNOTATE_NOENDBR call srso_alias_safe_ret ud2 SYM_CODE_END(srso_alias_return_thunk) + .section .text..__x86.return_thunk /* * Some generic notes on the untraining sequences: * -- 2.41.0
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