From: Eric Biggers <ebiggers@google.com> stable inclusion from stable-v6.6.33 commit 1c5bce29d0d9376782a8d8a76cd423ae43ef280f category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAD6H2 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 57ce8a4e162599cf9adafef1f29763160a8e5564 ] Since sha256_transform_rorx() uses ymm registers, execute vzeroupper before returning from it. This is necessary to avoid reducing the performance of SSE code. Fixes: d34a460092d8 ("crypto: sha256 - Optimized sha256 x86_64 routine using AVX2's RORX instructions") Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Wang Hai <wanghai38@huawei.com> --- arch/x86/crypto/sha256-avx2-asm.S | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/crypto/sha256-avx2-asm.S b/arch/x86/crypto/sha256-avx2-asm.S index 9918212faf91..0ffb072be956 100644 --- a/arch/x86/crypto/sha256-avx2-asm.S +++ b/arch/x86/crypto/sha256-avx2-asm.S @@ -716,6 +716,7 @@ SYM_TYPED_FUNC_START(sha256_transform_rorx) popq %r13 popq %r12 popq %rbx + vzeroupper RET SYM_FUNC_END(sha256_transform_rorx) -- 2.17.1