diff options
| author | John Haxby <john.haxby@oracle.com> | 2013-08-14 16:23:18 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-14 07:06:46 -0700 |
| commit | 34bf8c60e35037c21db3a52a2da7ea557dfd9ea6 (patch) | |
| tree | f8d9c7386cf1e3dfb2e771392b6fafd0f7fdef96 | |
| parent | 682903751a46cb1704f3f29d7f0c7c408d5b8da5 (diff) | |
crypto: xor - Check for osxsave as well as avx in crypto/xor
commit edb6f29464afc65fc73767540b854abf63ae7144 upstream.
This affects xen pv guests with sufficiently old versions of xen and
sufficiently new hardware. On such a system, a guest with a btrfs
root won't even boot.
Signed-off-by: John Haxby <john.haxby@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reported-by: Michael Marineau <michael.marineau@coreos.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/include/asm/xor_avx.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/include/asm/xor_avx.h b/arch/x86/include/asm/xor_avx.h index 7ea79c5fa1f..492b29802f5 100644 --- a/arch/x86/include/asm/xor_avx.h +++ b/arch/x86/include/asm/xor_avx.h @@ -167,12 +167,12 @@ static struct xor_block_template xor_block_avx = { #define AVX_XOR_SPEED \ do { \ - if (cpu_has_avx) \ + if (cpu_has_avx && cpu_has_osxsave) \ xor_speed(&xor_block_avx); \ } while (0) #define AVX_SELECT(FASTEST) \ - (cpu_has_avx ? &xor_block_avx : FASTEST) + (cpu_has_avx && cpu_has_osxsave ? &xor_block_avx : FASTEST) #else |