Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
arm64/hwcap: Generate the KERNEL_HWCAP_ definitions for the hwcaps
Currently for each hwcap we define both the HWCAPn_NAME definition which is
exposed to userspace and a kernel internal KERNEL_HWCAP_NAME definition
which we use internally. This is tedious and repetitive, instead use a
script to generate the KERNEL_HWCAP_ definitions from the UAPI definitions.
No functional changes intended.
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
authored by
Mark Brown
and committed by
Catalin Marinas
abed23c3
ee020bf6
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-119
+2
-118
arch/arm64/include/asm/hwcap.h
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-118
arch/arm64/include/asm/hwcap.h
···
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* of KERNEL_HWCAP_{feature}.
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*/
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#define __khwcap_feature(x) const_ilog2(HWCAP_ ## x)
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#define KERNEL_HWCAP_FP __khwcap_feature(FP)
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#define KERNEL_HWCAP_ASIMD __khwcap_feature(ASIMD)
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#define KERNEL_HWCAP_EVTSTRM __khwcap_feature(EVTSTRM)
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#define KERNEL_HWCAP_AES __khwcap_feature(AES)
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#define KERNEL_HWCAP_PMULL __khwcap_feature(PMULL)
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#define KERNEL_HWCAP_SHA1 __khwcap_feature(SHA1)
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#define KERNEL_HWCAP_SHA2 __khwcap_feature(SHA2)
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#define KERNEL_HWCAP_CRC32 __khwcap_feature(CRC32)
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#define KERNEL_HWCAP_ATOMICS __khwcap_feature(ATOMICS)
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#define KERNEL_HWCAP_FPHP __khwcap_feature(FPHP)
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#define KERNEL_HWCAP_ASIMDHP __khwcap_feature(ASIMDHP)
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#define KERNEL_HWCAP_CPUID __khwcap_feature(CPUID)
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#define KERNEL_HWCAP_ASIMDRDM __khwcap_feature(ASIMDRDM)
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#define KERNEL_HWCAP_JSCVT __khwcap_feature(JSCVT)
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#define KERNEL_HWCAP_FCMA __khwcap_feature(FCMA)
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#define KERNEL_HWCAP_LRCPC __khwcap_feature(LRCPC)
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#define KERNEL_HWCAP_DCPOP __khwcap_feature(DCPOP)
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#define KERNEL_HWCAP_SHA3 __khwcap_feature(SHA3)
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#define KERNEL_HWCAP_SM3 __khwcap_feature(SM3)
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#define KERNEL_HWCAP_SM4 __khwcap_feature(SM4)
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#define KERNEL_HWCAP_ASIMDDP __khwcap_feature(ASIMDDP)
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#define KERNEL_HWCAP_SHA512 __khwcap_feature(SHA512)
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#define KERNEL_HWCAP_SVE __khwcap_feature(SVE)
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#define KERNEL_HWCAP_ASIMDFHM __khwcap_feature(ASIMDFHM)
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#define KERNEL_HWCAP_DIT __khwcap_feature(DIT)
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#define KERNEL_HWCAP_USCAT __khwcap_feature(USCAT)
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#define KERNEL_HWCAP_ILRCPC __khwcap_feature(ILRCPC)
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#define KERNEL_HWCAP_FLAGM __khwcap_feature(FLAGM)
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#define KERNEL_HWCAP_SSBS __khwcap_feature(SSBS)
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#define KERNEL_HWCAP_SB __khwcap_feature(SB)
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#define KERNEL_HWCAP_PACA __khwcap_feature(PACA)
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#define KERNEL_HWCAP_PACG __khwcap_feature(PACG)
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#define KERNEL_HWCAP_GCS __khwcap_feature(GCS)
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#define KERNEL_HWCAP_CMPBR __khwcap_feature(CMPBR)
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#define KERNEL_HWCAP_FPRCVT __khwcap_feature(FPRCVT)
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#define KERNEL_HWCAP_F8MM8 __khwcap_feature(F8MM8)
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#define KERNEL_HWCAP_F8MM4 __khwcap_feature(F8MM4)
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#define KERNEL_HWCAP_SVE_F16MM __khwcap_feature(SVE_F16MM)
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#define KERNEL_HWCAP_SVE_ELTPERM __khwcap_feature(SVE_ELTPERM)
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#define KERNEL_HWCAP_SVE_AES2 __khwcap_feature(SVE_AES2)
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#define KERNEL_HWCAP_SVE_BFSCALE __khwcap_feature(SVE_BFSCALE)
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#define KERNEL_HWCAP_SVE2P2 __khwcap_feature(SVE2P2)
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#define KERNEL_HWCAP_SME2P2 __khwcap_feature(SME2P2)
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#define KERNEL_HWCAP_SME_SBITPERM __khwcap_feature(SME_SBITPERM)
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#define KERNEL_HWCAP_SME_AES __khwcap_feature(SME_AES)
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#define KERNEL_HWCAP_SME_SFEXPA __khwcap_feature(SME_SFEXPA)
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#define KERNEL_HWCAP_SME_STMOP __khwcap_feature(SME_STMOP)
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#define KERNEL_HWCAP_SME_SMOP4 __khwcap_feature(SME_SMOP4)
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#define __khwcap2_feature(x) (const_ilog2(HWCAP2_ ## x) + 64)
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#define KERNEL_HWCAP_DCPODP __khwcap2_feature(DCPODP)
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#define KERNEL_HWCAP_SVE2 __khwcap2_feature(SVE2)
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#define KERNEL_HWCAP_SVEAES __khwcap2_feature(SVEAES)
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#define KERNEL_HWCAP_SVEPMULL __khwcap2_feature(SVEPMULL)
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#define KERNEL_HWCAP_SVEBITPERM __khwcap2_feature(SVEBITPERM)
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#define KERNEL_HWCAP_SVESHA3 __khwcap2_feature(SVESHA3)
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#define KERNEL_HWCAP_SVESM4 __khwcap2_feature(SVESM4)
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#define KERNEL_HWCAP_FLAGM2 __khwcap2_feature(FLAGM2)
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#define KERNEL_HWCAP_FRINT __khwcap2_feature(FRINT)
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#define KERNEL_HWCAP_SVEI8MM __khwcap2_feature(SVEI8MM)
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#define KERNEL_HWCAP_SVEF32MM __khwcap2_feature(SVEF32MM)
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#define KERNEL_HWCAP_SVEF64MM __khwcap2_feature(SVEF64MM)
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#define KERNEL_HWCAP_SVEBF16 __khwcap2_feature(SVEBF16)
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#define KERNEL_HWCAP_I8MM __khwcap2_feature(I8MM)
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#define KERNEL_HWCAP_BF16 __khwcap2_feature(BF16)
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#define KERNEL_HWCAP_DGH __khwcap2_feature(DGH)
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#define KERNEL_HWCAP_RNG __khwcap2_feature(RNG)
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#define KERNEL_HWCAP_BTI __khwcap2_feature(BTI)
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#define KERNEL_HWCAP_MTE __khwcap2_feature(MTE)
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#define KERNEL_HWCAP_ECV __khwcap2_feature(ECV)
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#define KERNEL_HWCAP_AFP __khwcap2_feature(AFP)
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#define KERNEL_HWCAP_RPRES __khwcap2_feature(RPRES)
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#define KERNEL_HWCAP_MTE3 __khwcap2_feature(MTE3)
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#define KERNEL_HWCAP_SME __khwcap2_feature(SME)
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#define KERNEL_HWCAP_SME_I16I64 __khwcap2_feature(SME_I16I64)
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#define KERNEL_HWCAP_SME_F64F64 __khwcap2_feature(SME_F64F64)
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#define KERNEL_HWCAP_SME_I8I32 __khwcap2_feature(SME_I8I32)
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#define KERNEL_HWCAP_SME_F16F32 __khwcap2_feature(SME_F16F32)
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#define KERNEL_HWCAP_SME_B16F32 __khwcap2_feature(SME_B16F32)
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#define KERNEL_HWCAP_SME_F32F32 __khwcap2_feature(SME_F32F32)
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#define KERNEL_HWCAP_SME_FA64 __khwcap2_feature(SME_FA64)
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#define KERNEL_HWCAP_WFXT __khwcap2_feature(WFXT)
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#define KERNEL_HWCAP_EBF16 __khwcap2_feature(EBF16)
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#define KERNEL_HWCAP_SVE_EBF16 __khwcap2_feature(SVE_EBF16)
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#define KERNEL_HWCAP_CSSC __khwcap2_feature(CSSC)
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#define KERNEL_HWCAP_RPRFM __khwcap2_feature(RPRFM)
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#define KERNEL_HWCAP_SVE2P1 __khwcap2_feature(SVE2P1)
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#define KERNEL_HWCAP_SME2 __khwcap2_feature(SME2)
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#define KERNEL_HWCAP_SME2P1 __khwcap2_feature(SME2P1)
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#define KERNEL_HWCAP_SME_I16I32 __khwcap2_feature(SME_I16I32)
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#define KERNEL_HWCAP_SME_BI32I32 __khwcap2_feature(SME_BI32I32)
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#define KERNEL_HWCAP_SME_B16B16 __khwcap2_feature(SME_B16B16)
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#define KERNEL_HWCAP_SME_F16F16 __khwcap2_feature(SME_F16F16)
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#define KERNEL_HWCAP_MOPS __khwcap2_feature(MOPS)
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#define KERNEL_HWCAP_HBC __khwcap2_feature(HBC)
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#define KERNEL_HWCAP_SVE_B16B16 __khwcap2_feature(SVE_B16B16)
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#define KERNEL_HWCAP_LRCPC3 __khwcap2_feature(LRCPC3)
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#define KERNEL_HWCAP_LSE128 __khwcap2_feature(LSE128)
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#define KERNEL_HWCAP_FPMR __khwcap2_feature(FPMR)
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#define KERNEL_HWCAP_LUT __khwcap2_feature(LUT)
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#define KERNEL_HWCAP_FAMINMAX __khwcap2_feature(FAMINMAX)
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#define KERNEL_HWCAP_F8CVT __khwcap2_feature(F8CVT)
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#define KERNEL_HWCAP_F8FMA __khwcap2_feature(F8FMA)
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#define KERNEL_HWCAP_F8DP4 __khwcap2_feature(F8DP4)
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#define KERNEL_HWCAP_F8DP2 __khwcap2_feature(F8DP2)
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#define KERNEL_HWCAP_F8E4M3 __khwcap2_feature(F8E4M3)
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#define KERNEL_HWCAP_F8E5M2 __khwcap2_feature(F8E5M2)
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#define KERNEL_HWCAP_SME_LUTV2 __khwcap2_feature(SME_LUTV2)
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#define KERNEL_HWCAP_SME_F8F16 __khwcap2_feature(SME_F8F16)
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#define KERNEL_HWCAP_SME_F8F32 __khwcap2_feature(SME_F8F32)
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#define KERNEL_HWCAP_SME_SF8FMA __khwcap2_feature(SME_SF8FMA)
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#define KERNEL_HWCAP_SME_SF8DP4 __khwcap2_feature(SME_SF8DP4)
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#define KERNEL_HWCAP_SME_SF8DP2 __khwcap2_feature(SME_SF8DP2)
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#define KERNEL_HWCAP_POE __khwcap2_feature(POE)
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#define __khwcap3_feature(x) (const_ilog2(HWCAP3_ ## x) + 128)
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#define KERNEL_HWCAP_MTE_FAR __khwcap3_feature(MTE_FAR)
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#define KERNEL_HWCAP_MTE_STORE_ONLY __khwcap3_feature(MTE_STORE_ONLY)
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#define KERNEL_HWCAP_LSFE __khwcap3_feature(LSFE)
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#define KERNEL_HWCAP_LS64 __khwcap3_feature(LS64)
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#include "asm/kernel-hwcap.h"
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/*
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* This yields a mask that user programs can use to figure out what
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-1
arch/arm64/tools/Makefile
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-1
arch/arm64/tools/Makefile
···
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gen := arch/$(ARCH)/include/generated
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kapi := $(gen)/asm
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kapisyshdr-y := cpucap-defs.h sysreg-defs.h
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kapisyshdr-y := cpucap-defs.h kernel-hwcap.h sysreg-defs.h
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kapi-hdrs-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
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···
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quiet_cmd_gen_cpucaps = GEN $@
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cmd_gen_cpucaps = mkdir -p $(dir $@); $(AWK) -f $(real-prereqs) > $@
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quiet_cmd_gen_kernel_hwcap = GEN $@
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cmd_gen_kernel_hwcap = mkdir -p $(dir $@); /bin/sh -e $(real-prereqs) > $@
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quiet_cmd_gen_sysreg = GEN $@
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cmd_gen_sysreg = mkdir -p $(dir $@); $(AWK) -f $(real-prereqs) > $@
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$(kapi)/cpucap-defs.h: $(src)/gen-cpucaps.awk $(src)/cpucaps FORCE
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$(call if_changed,gen_cpucaps)
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$(kapi)/kernel-hwcap.h: $(src)/gen-kernel-hwcaps.sh $(srctree)/arch/arm64/include/uapi/asm/hwcap.h FORCE
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$(call if_changed,gen_kernel_hwcap)
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$(kapi)/sysreg-defs.h: $(src)/gen-sysreg.awk $(src)/sysreg FORCE
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$(call if_changed,gen_sysreg)
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arch/arm64/tools/gen-kernel-hwcaps.sh
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arch/arm64/tools/gen-kernel-hwcaps.sh
···
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#!/bin/sh -e
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# SPDX-License-Identifier: GPL-2.0
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#
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# gen-kernel-hwcap.sh - Generate kernel internal hwcap.h definitions
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#
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# Copyright 2026 Arm, Ltd.
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if [ "$1" = "" ]; then
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echo "$0: no filename specified"
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exit 1
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fi
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echo "#ifndef __ASM_KERNEL_HWCAPS_H"
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echo "#define __ASM_KERNEL_HWCAPS_H"
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echo ""
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echo "/* Generated file - do not edit */"
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echo ""
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grep -E '^#define HWCAP[0-9]*_[A-Z0-9_]+' $1 | \
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sed 's/.*HWCAP\([0-9]*\)_\([A-Z0-9_]\+\).*/#define KERNEL_HWCAP_\2\t__khwcap\1_feature(\2)/'
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echo ""
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echo "#endif /* __ASM_KERNEL_HWCAPS_H */"