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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>
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Lines changed: 32 additions & 119 deletions

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‎arch/arm64/include/asm/hwcap.h‎

Lines changed: 2 additions & 118 deletions
Original file line numberDiff line numberDiff line change
@@ -60,126 +60,10 @@
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* of KERNEL_HWCAP_{feature}.
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*/
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#define __khwcap_feature(x) const_ilog2(HWCAP_ ## x)
63-
#define KERNEL_HWCAP_FP __khwcap_feature(FP)
64-
#define KERNEL_HWCAP_ASIMD __khwcap_feature(ASIMD)
65-
#define KERNEL_HWCAP_EVTSTRM __khwcap_feature(EVTSTRM)
66-
#define KERNEL_HWCAP_AES __khwcap_feature(AES)
67-
#define KERNEL_HWCAP_PMULL __khwcap_feature(PMULL)
68-
#define KERNEL_HWCAP_SHA1 __khwcap_feature(SHA1)
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#define KERNEL_HWCAP_SHA2 __khwcap_feature(SHA2)
70-
#define KERNEL_HWCAP_CRC32 __khwcap_feature(CRC32)
71-
#define KERNEL_HWCAP_ATOMICS __khwcap_feature(ATOMICS)
72-
#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)
81-
#define KERNEL_HWCAP_SM3 __khwcap_feature(SM3)
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#define KERNEL_HWCAP_SM4 __khwcap_feature(SM4)
83-
#define KERNEL_HWCAP_ASIMDDP __khwcap_feature(ASIMDDP)
84-
#define KERNEL_HWCAP_SHA512 __khwcap_feature(SHA512)
85-
#define KERNEL_HWCAP_SVE __khwcap_feature(SVE)
86-
#define KERNEL_HWCAP_ASIMDFHM __khwcap_feature(ASIMDFHM)
87-
#define KERNEL_HWCAP_DIT __khwcap_feature(DIT)
88-
#define KERNEL_HWCAP_USCAT __khwcap_feature(USCAT)
89-
#define KERNEL_HWCAP_ILRCPC __khwcap_feature(ILRCPC)
90-
#define KERNEL_HWCAP_FLAGM __khwcap_feature(FLAGM)
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#define KERNEL_HWCAP_SSBS __khwcap_feature(SSBS)
92-
#define KERNEL_HWCAP_SB __khwcap_feature(SB)
93-
#define KERNEL_HWCAP_PACA __khwcap_feature(PACA)
94-
#define KERNEL_HWCAP_PACG __khwcap_feature(PACG)
95-
#define KERNEL_HWCAP_GCS __khwcap_feature(GCS)
96-
#define KERNEL_HWCAP_CMPBR __khwcap_feature(CMPBR)
97-
#define KERNEL_HWCAP_FPRCVT __khwcap_feature(FPRCVT)
98-
#define KERNEL_HWCAP_F8MM8 __khwcap_feature(F8MM8)
99-
#define KERNEL_HWCAP_F8MM4 __khwcap_feature(F8MM4)
100-
#define KERNEL_HWCAP_SVE_F16MM __khwcap_feature(SVE_F16MM)
101-
#define KERNEL_HWCAP_SVE_ELTPERM __khwcap_feature(SVE_ELTPERM)
102-
#define KERNEL_HWCAP_SVE_AES2 __khwcap_feature(SVE_AES2)
103-
#define KERNEL_HWCAP_SVE_BFSCALE __khwcap_feature(SVE_BFSCALE)
104-
#define KERNEL_HWCAP_SVE2P2 __khwcap_feature(SVE2P2)
105-
#define KERNEL_HWCAP_SME2P2 __khwcap_feature(SME2P2)
106-
#define KERNEL_HWCAP_SME_SBITPERM __khwcap_feature(SME_SBITPERM)
107-
#define KERNEL_HWCAP_SME_AES __khwcap_feature(SME_AES)
108-
#define KERNEL_HWCAP_SME_SFEXPA __khwcap_feature(SME_SFEXPA)
109-
#define KERNEL_HWCAP_SME_STMOP __khwcap_feature(SME_STMOP)
110-
#define KERNEL_HWCAP_SME_SMOP4 __khwcap_feature(SME_SMOP4)
111-
11263
#define __khwcap2_feature(x) (const_ilog2(HWCAP2_ ## x) + 64)
113-
#define KERNEL_HWCAP_DCPODP __khwcap2_feature(DCPODP)
114-
#define KERNEL_HWCAP_SVE2 __khwcap2_feature(SVE2)
115-
#define KERNEL_HWCAP_SVEAES __khwcap2_feature(SVEAES)
116-
#define KERNEL_HWCAP_SVEPMULL __khwcap2_feature(SVEPMULL)
117-
#define KERNEL_HWCAP_SVEBITPERM __khwcap2_feature(SVEBITPERM)
118-
#define KERNEL_HWCAP_SVESHA3 __khwcap2_feature(SVESHA3)
119-
#define KERNEL_HWCAP_SVESM4 __khwcap2_feature(SVESM4)
120-
#define KERNEL_HWCAP_FLAGM2 __khwcap2_feature(FLAGM2)
121-
#define KERNEL_HWCAP_FRINT __khwcap2_feature(FRINT)
122-
#define KERNEL_HWCAP_SVEI8MM __khwcap2_feature(SVEI8MM)
123-
#define KERNEL_HWCAP_SVEF32MM __khwcap2_feature(SVEF32MM)
124-
#define KERNEL_HWCAP_SVEF64MM __khwcap2_feature(SVEF64MM)
125-
#define KERNEL_HWCAP_SVEBF16 __khwcap2_feature(SVEBF16)
126-
#define KERNEL_HWCAP_I8MM __khwcap2_feature(I8MM)
127-
#define KERNEL_HWCAP_BF16 __khwcap2_feature(BF16)
128-
#define KERNEL_HWCAP_DGH __khwcap2_feature(DGH)
129-
#define KERNEL_HWCAP_RNG __khwcap2_feature(RNG)
130-
#define KERNEL_HWCAP_BTI __khwcap2_feature(BTI)
131-
#define KERNEL_HWCAP_MTE __khwcap2_feature(MTE)
132-
#define KERNEL_HWCAP_ECV __khwcap2_feature(ECV)
133-
#define KERNEL_HWCAP_AFP __khwcap2_feature(AFP)
134-
#define KERNEL_HWCAP_RPRES __khwcap2_feature(RPRES)
135-
#define KERNEL_HWCAP_MTE3 __khwcap2_feature(MTE3)
136-
#define KERNEL_HWCAP_SME __khwcap2_feature(SME)
137-
#define KERNEL_HWCAP_SME_I16I64 __khwcap2_feature(SME_I16I64)
138-
#define KERNEL_HWCAP_SME_F64F64 __khwcap2_feature(SME_F64F64)
139-
#define KERNEL_HWCAP_SME_I8I32 __khwcap2_feature(SME_I8I32)
140-
#define KERNEL_HWCAP_SME_F16F32 __khwcap2_feature(SME_F16F32)
141-
#define KERNEL_HWCAP_SME_B16F32 __khwcap2_feature(SME_B16F32)
142-
#define KERNEL_HWCAP_SME_F32F32 __khwcap2_feature(SME_F32F32)
143-
#define KERNEL_HWCAP_SME_FA64 __khwcap2_feature(SME_FA64)
144-
#define KERNEL_HWCAP_WFXT __khwcap2_feature(WFXT)
145-
#define KERNEL_HWCAP_EBF16 __khwcap2_feature(EBF16)
146-
#define KERNEL_HWCAP_SVE_EBF16 __khwcap2_feature(SVE_EBF16)
147-
#define KERNEL_HWCAP_CSSC __khwcap2_feature(CSSC)
148-
#define KERNEL_HWCAP_RPRFM __khwcap2_feature(RPRFM)
149-
#define KERNEL_HWCAP_SVE2P1 __khwcap2_feature(SVE2P1)
150-
#define KERNEL_HWCAP_SME2 __khwcap2_feature(SME2)
151-
#define KERNEL_HWCAP_SME2P1 __khwcap2_feature(SME2P1)
152-
#define KERNEL_HWCAP_SME_I16I32 __khwcap2_feature(SME_I16I32)
153-
#define KERNEL_HWCAP_SME_BI32I32 __khwcap2_feature(SME_BI32I32)
154-
#define KERNEL_HWCAP_SME_B16B16 __khwcap2_feature(SME_B16B16)
155-
#define KERNEL_HWCAP_SME_F16F16 __khwcap2_feature(SME_F16F16)
156-
#define KERNEL_HWCAP_MOPS __khwcap2_feature(MOPS)
157-
#define KERNEL_HWCAP_HBC __khwcap2_feature(HBC)
158-
#define KERNEL_HWCAP_SVE_B16B16 __khwcap2_feature(SVE_B16B16)
159-
#define KERNEL_HWCAP_LRCPC3 __khwcap2_feature(LRCPC3)
160-
#define KERNEL_HWCAP_LSE128 __khwcap2_feature(LSE128)
161-
#define KERNEL_HWCAP_FPMR __khwcap2_feature(FPMR)
162-
#define KERNEL_HWCAP_LUT __khwcap2_feature(LUT)
163-
#define KERNEL_HWCAP_FAMINMAX __khwcap2_feature(FAMINMAX)
164-
#define KERNEL_HWCAP_F8CVT __khwcap2_feature(F8CVT)
165-
#define KERNEL_HWCAP_F8FMA __khwcap2_feature(F8FMA)
166-
#define KERNEL_HWCAP_F8DP4 __khwcap2_feature(F8DP4)
167-
#define KERNEL_HWCAP_F8DP2 __khwcap2_feature(F8DP2)
168-
#define KERNEL_HWCAP_F8E4M3 __khwcap2_feature(F8E4M3)
169-
#define KERNEL_HWCAP_F8E5M2 __khwcap2_feature(F8E5M2)
170-
#define KERNEL_HWCAP_SME_LUTV2 __khwcap2_feature(SME_LUTV2)
171-
#define KERNEL_HWCAP_SME_F8F16 __khwcap2_feature(SME_F8F16)
172-
#define KERNEL_HWCAP_SME_F8F32 __khwcap2_feature(SME_F8F32)
173-
#define KERNEL_HWCAP_SME_SF8FMA __khwcap2_feature(SME_SF8FMA)
174-
#define KERNEL_HWCAP_SME_SF8DP4 __khwcap2_feature(SME_SF8DP4)
175-
#define KERNEL_HWCAP_SME_SF8DP2 __khwcap2_feature(SME_SF8DP2)
176-
#define KERNEL_HWCAP_POE __khwcap2_feature(POE)
177-
17864
#define __khwcap3_feature(x) (const_ilog2(HWCAP3_ ## x) + 128)
179-
#define KERNEL_HWCAP_MTE_FAR __khwcap3_feature(MTE_FAR)
180-
#define KERNEL_HWCAP_MTE_STORE_ONLY __khwcap3_feature(MTE_STORE_ONLY)
181-
#define KERNEL_HWCAP_LSFE __khwcap3_feature(LSFE)
182-
#define KERNEL_HWCAP_LS64 __khwcap3_feature(LS64)
65+
66+
#include "asm/kernel-hwcap.h"
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18468
/*
18569
* This yields a mask that user programs can use to figure out what

‎arch/arm64/tools/Makefile‎

Lines changed: 7 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -3,7 +3,7 @@
33
gen := arch/$(ARCH)/include/generated
44
kapi := $(gen)/asm
55

6-
kapisyshdr-y := cpucap-defs.h sysreg-defs.h
6+
kapisyshdr-y := cpucap-defs.h kernel-hwcap.h sysreg-defs.h
77

88
kapi-hdrs-y := $(addprefix $(kapi)/, $(kapisyshdr-y))
99

@@ -18,11 +18,17 @@ kapi: $(kapi-hdrs-y)
1818
quiet_cmd_gen_cpucaps = GEN $@
1919
cmd_gen_cpucaps = mkdir -p $(dir $@); $(AWK) -f $(real-prereqs) > $@
2020

21+
quiet_cmd_gen_kernel_hwcap = GEN $@
22+
cmd_gen_kernel_hwcap = mkdir -p $(dir $@); /bin/sh -e $(real-prereqs) > $@
23+
2124
quiet_cmd_gen_sysreg = GEN $@
2225
cmd_gen_sysreg = mkdir -p $(dir $@); $(AWK) -f $(real-prereqs) > $@
2326

2427
$(kapi)/cpucap-defs.h: $(src)/gen-cpucaps.awk $(src)/cpucaps FORCE
2528
$(call if_changed,gen_cpucaps)
2629

30+
$(kapi)/kernel-hwcap.h: $(src)/gen-kernel-hwcaps.sh $(srctree)/arch/arm64/include/uapi/asm/hwcap.h FORCE
31+
$(call if_changed,gen_kernel_hwcap)
32+
2733
$(kapi)/sysreg-defs.h: $(src)/gen-sysreg.awk $(src)/sysreg FORCE
2834
$(call if_changed,gen_sysreg)

‎arch/arm64/tools/gen-kernel-hwcaps.sh‎

Lines changed: 23 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,23 @@
1+
#!/bin/sh -e
2+
# SPDX-License-Identifier: GPL-2.0
3+
#
4+
# gen-kernel-hwcap.sh - Generate kernel internal hwcap.h definitions
5+
#
6+
# Copyright 2026 Arm, Ltd.
7+
8+
if [ "$1" = "" ]; then
9+
echo "$0: no filename specified"
10+
exit 1
11+
fi
12+
13+
echo "#ifndef __ASM_KERNEL_HWCAPS_H"
14+
echo "#define __ASM_KERNEL_HWCAPS_H"
15+
echo ""
16+
echo "/* Generated file - do not edit */"
17+
echo ""
18+
19+
grep -E '^#define HWCAP[0-9]*_[A-Z0-9_]+' $1 | \
20+
sed 's/.*HWCAP\([0-9]*\)_\([A-Z0-9_]\+\).*/#define KERNEL_HWCAP_\2\t__khwcap\1_feature(\2)/'
21+
22+
echo ""
23+
echo "#endif /* __ASM_KERNEL_HWCAPS_H */"

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