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Unverified Commit 256211f2 authored by Marcin Nowakowski's avatar Marcin Nowakowski Committed by James Hogan
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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: default avatarMarcin Nowakowski <marcin.nowakowski@mips.com>
Signed-off-by: default avatarJames 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/
parent ab3d8441

arch/mips/include/asm/mipsregs.h

+1 −0
Original line number Diff line number Diff line
@@ -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)

arch/mips/include/uapi/asm/hwcap.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */

arch/mips/kernel/cpu-probe.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

}