arch/arm64/include/asm/hwcap.h

   1 /*
   2  * Copyright (C) 2012 ARM Ltd.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 #ifndef __ASM_HWCAP_H
  17 #define __ASM_HWCAP_H
  18
  19 #include <uapi/asm/hwcap.h>
  20 #include <asm/cpufeature.h>
  21
  22 #define COMPAT_HWCAP_HALF       (1 << 1)
  23 #define COMPAT_HWCAP_THUMB      (1 << 2)
  24 #define COMPAT_HWCAP_FAST_MULT  (1 << 4)
  25 #define COMPAT_HWCAP_VFP        (1 << 6)
  26 #define COMPAT_HWCAP_EDSP       (1 << 7)
  27 #define COMPAT_HWCAP_NEON       (1 << 12)
  28 #define COMPAT_HWCAP_VFPv3      (1 << 13)
  29 #define COMPAT_HWCAP_TLS        (1 << 15)
  30 #define COMPAT_HWCAP_VFPv4      (1 << 16)
  31 #define COMPAT_HWCAP_IDIVA      (1 << 17)
  32 #define COMPAT_HWCAP_IDIVT      (1 << 18)
  33 #define COMPAT_HWCAP_IDIV       (COMPAT_HWCAP_IDIVA|COMPAT_HWCAP_IDIVT)
  34 #define COMPAT_HWCAP_LPAE       (1 << 20)
  35 #define COMPAT_HWCAP_EVTSTRM    (1 << 21)
  36
  37 #define COMPAT_HWCAP2_AES       (1 << 0)
  38 #define COMPAT_HWCAP2_PMULL     (1 << 1)
  39 #define COMPAT_HWCAP2_SHA1      (1 << 2)
  40 #define COMPAT_HWCAP2_SHA2      (1 << 3)
  41 #define COMPAT_HWCAP2_CRC32     (1 << 4)
  42
  43 #ifndef __ASSEMBLY__
  44 #include <linux/log2.h>
  45
  46 /*
  47  * For userspace we represent hwcaps as a collection of HWCAP{,2}_x bitfields
  48  * as described in uapi/asm/hwcap.h. For the kernel we represent hwcaps as
  49  * natural numbers (in a single range of size MAX_CPU_FEATURES) defined here
  50  * with prefix KERNEL_HWCAP_ mapped to their HWCAP{,2}_x counterpart.
  51  *
  52  * Hwcaps should be set and tested within the kernel via the
  53  * cpu_{set,have}_named_feature(feature) where feature is the unique suffix
  54  * of KERNEL_HWCAP_{feature}.
  55  */
  56 #define __khwcap_feature(x)             const_ilog2(HWCAP_ ## x)
  57 #define KERNEL_HWCAP_FP                 __khwcap_feature(FP)
  58 #define KERNEL_HWCAP_ASIMD              __khwcap_feature(ASIMD)
  59 #define KERNEL_HWCAP_EVTSTRM            __khwcap_feature(EVTSTRM)
  60 #define KERNEL_HWCAP_AES                __khwcap_feature(AES)
  61 #define KERNEL_HWCAP_PMULL              __khwcap_feature(PMULL)
  62 #define KERNEL_HWCAP_SHA1               __khwcap_feature(SHA1)
  63 #define KERNEL_HWCAP_SHA2               __khwcap_feature(SHA2)
  64 #define KERNEL_HWCAP_CRC32              __khwcap_feature(CRC32)
  65 #define KERNEL_HWCAP_ATOMICS            __khwcap_feature(ATOMICS)
  66 #define KERNEL_HWCAP_FPHP               __khwcap_feature(FPHP)
  67 #define KERNEL_HWCAP_ASIMDHP            __khwcap_feature(ASIMDHP)
  68 #define KERNEL_HWCAP_CPUID              __khwcap_feature(CPUID)
  69 #define KERNEL_HWCAP_ASIMDRDM           __khwcap_feature(ASIMDRDM)
  70 #define KERNEL_HWCAP_JSCVT              __khwcap_feature(JSCVT)
  71 #define KERNEL_HWCAP_FCMA               __khwcap_feature(FCMA)
  72 #define KERNEL_HWCAP_LRCPC              __khwcap_feature(LRCPC)
  73 #define KERNEL_HWCAP_DCPOP              __khwcap_feature(DCPOP)
  74 #define KERNEL_HWCAP_SHA3               __khwcap_feature(SHA3)
  75 #define KERNEL_HWCAP_SM3                __khwcap_feature(SM3)
  76 #define KERNEL_HWCAP_SM4                __khwcap_feature(SM4)
  77 #define KERNEL_HWCAP_ASIMDDP            __khwcap_feature(ASIMDDP)
  78 #define KERNEL_HWCAP_SHA512             __khwcap_feature(SHA512)
  79 #define KERNEL_HWCAP_SVE                __khwcap_feature(SVE)
  80 #define KERNEL_HWCAP_ASIMDFHM           __khwcap_feature(ASIMDFHM)
  81 #define KERNEL_HWCAP_DIT                __khwcap_feature(DIT)
  82 #define KERNEL_HWCAP_USCAT              __khwcap_feature(USCAT)
  83 #define KERNEL_HWCAP_ILRCPC             __khwcap_feature(ILRCPC)
  84 #define KERNEL_HWCAP_FLAGM              __khwcap_feature(FLAGM)
  85 #define KERNEL_HWCAP_SSBS               __khwcap_feature(SSBS)
  86 #define KERNEL_HWCAP_SB                 __khwcap_feature(SB)
  87 #define KERNEL_HWCAP_PACA               __khwcap_feature(PACA)
  88 #define KERNEL_HWCAP_PACG               __khwcap_feature(PACG)
  89
  90 #define __khwcap2_feature(x)            (const_ilog2(HWCAP2_ ## x) + 32)
  91 #define KERNEL_HWCAP_DCPODP             __khwcap2_feature(DCPODP)
  92 #define KERNEL_HWCAP_SVE2               __khwcap2_feature(SVE2)
  93 #define KERNEL_HWCAP_SVEAES             __khwcap2_feature(SVEAES)
  94 #define KERNEL_HWCAP_SVEPMULL           __khwcap2_feature(SVEPMULL)
  95 #define KERNEL_HWCAP_SVEBITPERM         __khwcap2_feature(SVEBITPERM)
  96 #define KERNEL_HWCAP_SVESHA3            __khwcap2_feature(SVESHA3)
  97 #define KERNEL_HWCAP_SVESM4             __khwcap2_feature(SVESM4)
  98
  99 /*
 100  * This yields a mask that user programs can use to figure out what
 101  * instruction set this cpu supports.
 102  */
 103 #define ELF_HWCAP               cpu_get_elf_hwcap()
 104 #define ELF_HWCAP2              cpu_get_elf_hwcap2()
 105
 106 #ifdef CONFIG_COMPAT
 107 #define COMPAT_ELF_HWCAP        (compat_elf_hwcap)
 108 #define COMPAT_ELF_HWCAP2       (compat_elf_hwcap2)
 109 extern unsigned int compat_elf_hwcap, compat_elf_hwcap2;
 110 #endif
 111
 112 enum {
 113         CAP_HWCAP = 1,
 114 #ifdef CONFIG_COMPAT
 115         CAP_COMPAT_HWCAP,
 116         CAP_COMPAT_HWCAP2,
 117 #endif
 118 };
 119
 120 #endif
 121 #endif