Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
x86/crc: drop checks of CONFIG_AS_VPCLMULQDQ
Now that the minimum binutils version supports VPCLMULQDQ (and the
minimum clang version does too), there is no need to check for assembler
support before compiling code that uses these instructions.
Link: https://lore.kernel.org/r/20250531211318.83677-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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arch/x86/lib/crc-pclmul-template.S
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arch/x86/lib/crc-pclmul-template.S
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RET
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.endm
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-
#ifdef CONFIG_AS_VPCLMULQDQ
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#define DEFINE_CRC_PCLMUL_FUNCS(prefix, bits, lsb) \
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SYM_FUNC_START(prefix##_pclmul_sse); \
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_crc_pclmul n=bits, lsb_crc=lsb, vl=16, avx_level=0; \
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SYM_FUNC_START(prefix##_vpclmul_avx512); \
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_crc_pclmul n=bits, lsb_crc=lsb, vl=64, avx_level=512; \
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SYM_FUNC_END(prefix##_vpclmul_avx512);
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#else
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#define DEFINE_CRC_PCLMUL_FUNCS(prefix, bits, lsb) \
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SYM_FUNC_START(prefix##_pclmul_sse); \
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_crc_pclmul n=bits, lsb_crc=lsb, vl=16, avx_level=0; \
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SYM_FUNC_END(prefix##_pclmul_sse);
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#endif // !CONFIG_AS_VPCLMULQDQ
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arch/x86/lib/crc-pclmul-template.h
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arch/x86/lib/crc-pclmul-template.h
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#define INIT_CRC_PCLMUL(prefix) \
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do { \
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if (IS_ENABLED(CONFIG_AS_VPCLMULQDQ) && \
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boot_cpu_has(X86_FEATURE_VPCLMULQDQ) && \
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if (boot_cpu_has(X86_FEATURE_VPCLMULQDQ) && \
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boot_cpu_has(X86_FEATURE_AVX2) && \
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cpu_has_xfeatures(XFEATURE_MASK_YMM, NULL)) { \
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if (boot_cpu_has(X86_FEATURE_AVX512BW) && \