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x86/cpu: Use XGETBV and XSETBV mnemonics in fpu/internal.h
Current minimum required version of binutils is 2.23, which supports XGETBV and XSETBV instruction mnemonics. Replace the byte-wise specification of XGETBV and XSETBV with these proper mnemonics. Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20200707174722.58651-1-ubizjak@gmail.com
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@ -602,9 +602,7 @@ static inline u64 xgetbv(u32 index)
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{
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u32 eax, edx;
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asm volatile(".byte 0x0f,0x01,0xd0" /* xgetbv */
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: "=a" (eax), "=d" (edx)
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: "c" (index));
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asm volatile("xgetbv" : "=a" (eax), "=d" (edx) : "c" (index));
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return eax + ((u64)edx << 32);
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}
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@ -613,8 +611,7 @@ static inline void xsetbv(u32 index, u64 value)
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u32 eax = value;
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u32 edx = value >> 32;
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asm volatile(".byte 0x0f,0x01,0xd1" /* xsetbv */
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: : "a" (eax), "d" (edx), "c" (index));
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asm volatile("xsetbv" :: "a" (eax), "d" (edx), "c" (index));
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}
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#endif /* _ASM_X86_FPU_INTERNAL_H */
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