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crypto: x86/sha256-avx2 - add missing vzeroupper

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BugLink: https://bugs.launchpad.net/bugs/2071621

[ 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: d34a460092 ("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: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Eric Biggers
2024-04-05 20:26:09 -04:00
committed by Stefan Bader
parent 26824d3d25
commit 5bf72aaa4e
1 changed files with 1 additions and 0 deletions
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arch/x86/crypto/sha256-avx2-asm.S
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@@ -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)