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| author | Marcin Nowakowski <marcin.nowakowski@mips.com> | 2018-02-09 22:11:05 +0000 |
|---|---|---|
| committer | James Hogan <jhogan@kernel.org> | 2018-02-19 20:50:35 +0000 |
| commit | 256211f2b0b251e532d1899b115e374feb16fa7a (patch) | |
| tree | 6f47ee172a9a91d405677cf2dff8af919930b799 /arch/mips | |
| parent | ab3d8441290bcd648f487b69ea87cfe5b37d9e02 (diff) | |
| download | linux-256211f2b0b251e532d1899b115e374feb16fa7a.tar.gz linux-256211f2b0b251e532d1899b115e374feb16fa7a.tar.xz | |
MIPS: Add crc instruction support flag to elf_hwcap
Indicate that CRC32 and CRC32C instuctions are supported by the CPU
through elf_hwcap flags.
This will be used by a follow-up commit that introduces crc32(c) crypto
acceleration modules and is required by GENERIC_CPU_AUTOPROBE feature.
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@mips.com>
Signed-off-by: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/18600/
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/mipsregs.h | 1 | ||||
| -rw-r--r-- | arch/mips/include/uapi/asm/hwcap.h | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 3 |
3 files changed, 5 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h index 858752dac337..f65859784a4c 100644 --- a/arch/mips/include/asm/mipsregs.h +++ b/arch/mips/include/asm/mipsregs.h @@ -664,6 +664,7 @@ #define MIPS_CONF5_FRE (_ULCAST_(1) << 8) #define MIPS_CONF5_UFE (_ULCAST_(1) << 9) #define MIPS_CONF5_CA2 (_ULCAST_(1) << 14) +#define MIPS_CONF5_CRCP (_ULCAST_(1) << 18) #define MIPS_CONF5_MSAEN (_ULCAST_(1) << 27) #define MIPS_CONF5_EVA (_ULCAST_(1) << 28) #define MIPS_CONF5_CV (_ULCAST_(1) << 29) diff --git a/arch/mips/include/uapi/asm/hwcap.h b/arch/mips/include/uapi/asm/hwcap.h index 600ad8fd6835..a2aba4b059e6 100644 --- a/arch/mips/include/uapi/asm/hwcap.h +++ b/arch/mips/include/uapi/asm/hwcap.h @@ -5,5 +5,6 @@ /* HWCAP flags */ #define HWCAP_MIPS_R6 (1 << 0) #define HWCAP_MIPS_MSA (1 << 1) +#define HWCAP_MIPS_CRC32 (1 << 2) #endif /* _UAPI_ASM_HWCAP_H */ diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index cf3fd549e16d..6b07b739f914 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -848,6 +848,9 @@ static inline unsigned int decode_config5(struct cpuinfo_mips *c) if (config5 & MIPS_CONF5_CA2) c->ases |= MIPS_ASE_MIPS16E2; + if (config5 & MIPS_CONF5_CRCP) + elf_hwcap |= HWCAP_MIPS_CRC32; + return config5 & MIPS_CONF_M; } |