diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2016-02-03 03:15:21 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-05-13 14:01:47 +0200 |
| commit | f270d881fa552c9c21c37417af2bf95da9a74347 (patch) | |
| tree | 288743db1dfc7eb10d8a4bf0b590afbf539ca941 /arch/mips | |
| parent | 98c1c5078deba1feb9c040eb7708a299e41a8d84 (diff) | |
MIPS: Detect MIPSr6 Virtual Processor support
MIPSr6 introduces support for "Virtual Processors", which are
conceptually similar to VPEs from the now-deprecated MT ASE. Detect
whether the system supports VPs using the VP bit in Config5, adding
cpu_has_vp for use by later patches.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: Joshua Kinard <kumba@gentoo.org>
Cc: Steven J. Hill <sjhill@realitydiluted.com>
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12327/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/cpu-features.h | 4 | ||||
| -rw-r--r-- | arch/mips/include/asm/cpu.h | 1 | ||||
| -rw-r--r-- | arch/mips/include/asm/mipsregs.h | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 2 |
4 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h index eeec8c8e2da2..57cdc5be9545 100644 --- a/arch/mips/include/asm/cpu-features.h +++ b/arch/mips/include/asm/cpu-features.h @@ -311,6 +311,10 @@ #define cpu_has_mipsmt (cpu_data[0].ases & MIPS_ASE_MIPSMT) #endif +#ifndef cpu_has_vp +#define cpu_has_vp (cpu_data[0].options & MIPS_CPU_VP) +#endif + #ifndef cpu_has_userlocal #define cpu_has_userlocal (cpu_data[0].options & MIPS_CPU_ULRI) #endif diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h index 7bea0f3bf9ee..631aa10fdebe 100644 --- a/arch/mips/include/asm/cpu.h +++ b/arch/mips/include/asm/cpu.h @@ -390,6 +390,7 @@ enum cpu_type_enum { #define MIPS_CPU_FTLB 0x20000000000ull /* CPU has Fixed-page-size TLB */ #define MIPS_CPU_NAN_LEGACY 0x40000000000ull /* Legacy NaN implemented */ #define MIPS_CPU_NAN_2008 0x80000000000ull /* 2008 NaN implemented */ +#define MIPS_CPU_VP 0x100000000000ull /* MIPSr6 Virtual Processors (multi-threading) */ /* * CPU ASE encodings diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h index 3ad19ad04d8a..ca251f6fea8e 100644 --- a/arch/mips/include/asm/mipsregs.h +++ b/arch/mips/include/asm/mipsregs.h @@ -623,6 +623,7 @@ #define MIPS_CONF5_MRP (_ULCAST_(1) << 3) #define MIPS_CONF5_LLB (_ULCAST_(1) << 4) #define MIPS_CONF5_MVH (_ULCAST_(1) << 5) +#define MIPS_CONF5_VP (_ULCAST_(1) << 7) #define MIPS_CONF5_FRE (_ULCAST_(1) << 8) #define MIPS_CONF5_UFE (_ULCAST_(1) << 9) #define MIPS_CONF5_MSAEN (_ULCAST_(1) << 27) diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 9ad6157e23de..e0cfa3b85bca 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -796,6 +796,8 @@ static inline unsigned int decode_config5(struct cpuinfo_mips *c) if (config5 & MIPS_CONF5_MVH) c->options |= MIPS_CPU_XPA; #endif + if (cpu_has_mips_r6 && (config5 & MIPS_CONF5_VP)) + c->options |= MIPS_CPU_VP; return config5 & MIPS_CONF_M; } |