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hc
2024-02-19 1c055e55a242a33e574e48be530e06770a210dcd 
 kernel/arch/arm64/include/asm/hwcap.h
....@@ -1,35 +1,34 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
12 /*
23  * Copyright (C) 2012 ARM Ltd.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
154  */
165 #ifndef __ASM_HWCAP_H
176 #define __ASM_HWCAP_H
187 
198 #include <uapi/asm/hwcap.h>
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+#include <asm/cpufeature.h>
2010 
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+#define COMPAT_HWCAP_SWP	(1 << 0)
2112 #define COMPAT_HWCAP_HALF	(1 << 1)
2213 #define COMPAT_HWCAP_THUMB	(1 << 2)
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+#define COMPAT_HWCAP_26BIT	(1 << 3)
2315 #define COMPAT_HWCAP_FAST_MULT	(1 << 4)
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+#define COMPAT_HWCAP_FPA	(1 << 5)
2417 #define COMPAT_HWCAP_VFP	(1 << 6)
2518 #define COMPAT_HWCAP_EDSP	(1 << 7)
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+#define COMPAT_HWCAP_JAVA	(1 << 8)
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+#define COMPAT_HWCAP_IWMMXT	(1 << 9)
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+#define COMPAT_HWCAP_CRUNCH	(1 << 10)
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+#define COMPAT_HWCAP_THUMBEE	(1 << 11)
2623 #define COMPAT_HWCAP_NEON	(1 << 12)
2724 #define COMPAT_HWCAP_VFPv3	(1 << 13)
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+#define COMPAT_HWCAP_VFPV3D16	(1 << 14)
2826 #define COMPAT_HWCAP_TLS	(1 << 15)
2927 #define COMPAT_HWCAP_VFPv4	(1 << 16)
3028 #define COMPAT_HWCAP_IDIVA	(1 << 17)
3129 #define COMPAT_HWCAP_IDIVT	(1 << 18)
3230 #define COMPAT_HWCAP_IDIV	(COMPAT_HWCAP_IDIVA|COMPAT_HWCAP_IDIVT)
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+#define COMPAT_HWCAP_VFPD32	(1 << 19)
3332 #define COMPAT_HWCAP_LPAE	(1 << 20)
3433 #define COMPAT_HWCAP_EVTSTRM	(1 << 21)
3534 
....@@ -40,11 +39,82 @@
4039 #define COMPAT_HWCAP2_CRC32	(1 << 4)
4140 
4241 #ifndef __ASSEMBLY__
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+#include <linux/log2.h>
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+
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+/*
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+ * For userspace we represent hwcaps as a collection of HWCAP{,2}_x bitfields
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+ * as described in uapi/asm/hwcap.h. For the kernel we represent hwcaps as
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+ * natural numbers (in a single range of size MAX_CPU_FEATURES) defined here
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+ * with prefix KERNEL_HWCAP_ mapped to their HWCAP{,2}_x counterpart.
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+ *
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+ * Hwcaps should be set and tested within the kernel via the
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+ * cpu_{set,have}_named_feature(feature) where feature is the unique suffix
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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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+
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+#define __khwcap2_feature(x)		(const_ilog2(HWCAP2_ ## x) + 32)
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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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+
43112 /*
44113  * This yields a mask that user programs can use to figure out what
45114  * instruction set this cpu supports.
46115  */
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-#define ELF_HWCAP		(elf_hwcap)
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+#define ELF_HWCAP		cpu_get_elf_hwcap()
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+#define ELF_HWCAP2		cpu_get_elf_hwcap2()
48118 
49119 #ifdef CONFIG_COMPAT
50120 #define COMPAT_ELF_HWCAP	(compat_elf_hwcap)
....@@ -60,6 +130,5 @@
60130 #endif
61131 };
62132 
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-extern unsigned long elf_hwcap;
64133 #endif
65134 #endif