On Wed, Sep 27, 2017 at 02:18:35PM +0200, Marcin Nowakowski wrote: > 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> Looks good to me, Reviewed-by: James Hogan <james.hogan@xxxxxxxxxx> Cheers James > --- > 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 > >
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