diff options
Diffstat (limited to 'arch/mips/kernel/cpu-probe.c')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 064ab389e964..5ca4fefb1344 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -732,6 +732,7 @@ static inline unsigned int decode_config4(struct cpuinfo_mips *c) unsigned int newcf4; unsigned int mmuextdef; unsigned int ftlb_page = MIPS_CONF4_FTLBPAGESIZE; + unsigned long asid_mask; config4 = read_c0_config4(); @@ -792,6 +793,18 @@ static inline unsigned int decode_config4(struct cpuinfo_mips *c) c->kscratch_mask = (config4 >> 16) & 0xff; + asid_mask = MIPS_ENTRYHI_ASID; + if (config4 & MIPS_CONF4_AE) + asid_mask |= MIPS_ENTRYHI_ASIDX; + set_cpu_asid_mask(c, asid_mask); + + /* + * Warn if the computed ASID mask doesn't match the mask the kernel + * is built for. This may indicate either a serious problem or an + * easy optimisation opportunity, but either way should be addressed. + */ + WARN_ON(asid_mask != cpu_asid_mask(c)); + return config4 & MIPS_CONF_M; } |