From: Eric Biggers <ebiggers@xxxxxxxxxx>
Since nh_avx2() uses ymm registers, execute vzeroupper before returning
from it. This is necessary to avoid reducing the performance of SSE
code.
Fixes: 0f961f9f670e ("crypto: x86/nhpoly1305 - add AVX2 accelerated NHPoly1305")
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
arch/x86/crypto/nh-avx2-x86_64.S | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/crypto/nh-avx2-x86_64.S b/arch/x86/crypto/nh-avx2-x86_64.S
index ef73a3ab8726..791386d9a83a 100644
--- a/arch/x86/crypto/nh-avx2-x86_64.S
+++ b/arch/x86/crypto/nh-avx2-x86_64.S
@@ -152,7 +152,8 @@ SYM_TYPED_FUNC_START(nh_avx2)
vpaddq T5, T4, T4
vpaddq T1, T0, T0
vpaddq T4, T0, T0
vmovdqu T0, (HASH)
+ vzeroupper
RET
SYM_FUNC_END(nh_avx2)
--
2.44.0
