diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/include/asm/topology.h | 5 | ||||
-rw-r--r-- | arch/arm64/include/asm/topology.h | 2 | ||||
-rw-r--r-- | arch/arm64/kernel/topology.c | 9 |
3 files changed, 15 insertions, 1 deletions
diff --git a/arch/arm/include/asm/topology.h b/arch/arm/include/asm/topology.h index e0593cf095d0..470299ee2fba 100644 --- a/arch/arm/include/asm/topology.h +++ b/arch/arm/include/asm/topology.h @@ -7,8 +7,13 @@ #include <linux/cpumask.h> #include <linux/arch_topology.h> +/* big.LITTLE switcher is incompatible with frequency invariance */ +#ifndef CONFIG_BL_SWITCHER /* Replace task scheduler's default frequency-invariant accounting */ +#define arch_set_freq_scale topology_set_freq_scale #define arch_scale_freq_capacity topology_get_freq_scale +#define arch_scale_freq_invariant topology_scale_freq_invariant +#endif /* Replace task scheduler's default cpu-invariant accounting */ #define arch_scale_cpu_capacity topology_get_cpu_scale diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h index e042f6527981..11a465243f66 100644 --- a/arch/arm64/include/asm/topology.h +++ b/arch/arm64/include/asm/topology.h @@ -26,7 +26,9 @@ void topology_scale_freq_tick(void); #endif /* CONFIG_ARM64_AMU_EXTN */ /* Replace task scheduler's default frequency-invariant accounting */ +#define arch_set_freq_scale topology_set_freq_scale #define arch_scale_freq_capacity topology_get_freq_scale +#define arch_scale_freq_invariant topology_scale_freq_invariant /* Replace task scheduler's default cpu-invariant accounting */ #define arch_scale_cpu_capacity topology_get_cpu_scale diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c index 0801a0f3c156..4064d39bb66d 100644 --- a/arch/arm64/kernel/topology.c +++ b/arch/arm64/kernel/topology.c @@ -246,6 +246,13 @@ static int __init init_amu_fie(void) static_branch_enable(&amu_fie_key); } + /* + * If the system is not fully invariant after AMU init, disable + * partial use of counters for frequency invariance. + */ + if (!topology_scale_freq_invariant()) + static_branch_disable(&amu_fie_key); + free_valid_mask: free_cpumask_var(valid_cpus); @@ -253,7 +260,7 @@ free_valid_mask: } late_initcall_sync(init_amu_fie); -bool arch_freq_counters_available(struct cpumask *cpus) +bool arch_freq_counters_available(const struct cpumask *cpus) { return amu_freq_invariant() && cpumask_subset(cpus, amu_fie_cpus); |