Check the kernel has indeed enabled xsave before using AVX instructions.
Fixes the kernel boot panic with "noxsave" boot parameter.
Signed-off-by: Suresh Siddha <suresh.b.sid...@intel.com>
---
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 2510d35..77987cd 100644
--- a/arch/x86/include/asm/xor_avx.h
+++ b/arch/x86/include/asm/xor_avx.h
@@ -197,12 +197,12 @@ 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
--
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