crypto: xor - Check for osxsave as well as avx in crypto/xor
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>
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@ -167,12 +167,12 @@ static struct xor_block_template xor_block_avx = {
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#define AVX_XOR_SPEED \
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do { \
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if (cpu_has_avx) \
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if (cpu_has_avx && cpu_has_osxsave) \
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xor_speed(&xor_block_avx); \
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} while (0)
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#define AVX_SELECT(FASTEST) \
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(cpu_has_avx ? &xor_block_avx : FASTEST)
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(cpu_has_avx && cpu_has_osxsave ? &xor_block_avx : FASTEST)
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#else
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