diff options
Diffstat (limited to 'arch/mips/include/asm/cpu-features.h')
| -rw-r--r-- | arch/mips/include/asm/cpu-features.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h index 701e525641b8..6998a9796499 100644 --- a/arch/mips/include/asm/cpu-features.h +++ b/arch/mips/include/asm/cpu-features.h @@ -591,6 +591,19 @@ #endif /* CONFIG_MIPS_MT_SMP */ /* + * We only enable MMID support for configurations which natively support 64 bit + * atomics because getting good performance from the allocator relies upon + * efficient atomic64_*() functions. + */ +#ifndef cpu_has_mmid +# ifdef CONFIG_GENERIC_ATOMIC64 +# define cpu_has_mmid 0 +# else +# define cpu_has_mmid __isa_ge_and_opt(6, MIPS_CPU_MMID) +# endif +#endif + +/* * Guest capabilities */ #ifndef cpu_guest_has_conf1 |