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@xxxxxxxxxx> --- arch/mips/include/asm/mipsregs.h | 1 + arch/mips/include/uapi/asm/hwcap.h | 1 + arch/mips/kernel/cpu-probe.c | 3 +++ 3 files changed, 5 insertions(+) diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h index a681092..9db53cc 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 c7484a7..c7d2cb6 100644 --- a/arch/mips/include/uapi/asm/hwcap.h +++ b/arch/mips/include/uapi/asm/hwcap.h @@ -4,5 +4,6 @@ /* 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 cf3fd54..6b07b73 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; } -- 2.7.4
