From: Eric Biggers <ebiggers@xxxxxxxxxx>
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@xxxxxxxxxx>
---
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
@@ -714,10 +714,11 @@ SYM_TYPED_FUNC_START(sha256_transform_rorx)
popq %r15
popq %r14
popq %r13
popq %r12
popq %rbx
+ vzeroupper
RET
SYM_FUNC_END(sha256_transform_rorx)
.section .rodata.cst512.K256, "aM", @progbits, 512
.align 64
--
2.44.0
