From f1a50492f5bdb024a5eb4d1de6798369dbf93418 Mon Sep 17 00:00:00 2001 From: Ricardo Neri Date: Fri, 18 Apr 2025 19:55:04 -0700 Subject: [PATCH] cpufreq: intel_pstate: Populate the cpu_capacity sysfs entries Intel hybrid processors have CPUs of different capacity. Populate the interface /sys/devices/system/cpu/cpuN/cpu_capacity. This interface uses the per-CPU variable `cpu_scale`. On x86 this variable has no other use besides feeding the sysfs entries. Initialize it when setting CPU capacity for the scheduler and scale-invariant code. Feed it with arch_scale_cpu_capacity() as it gives capacity normalized to the interval [0, SCHED_CAPACITY_SCALE]. Signed-off-by: Ricardo Neri Signed-off-by: Rafael J. Wysocki --- drivers/cpufreq/intel_pstate.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 25830e5d76e8..531abd637696 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -955,6 +955,8 @@ static void hybrid_set_cpu_capacity(struct cpudata *cpu) cpu->capacity_perf, cpu->pstate.max_pstate_physical); + topology_set_cpu_scale(cpu->cpu, arch_scale_cpu_capacity(cpu->cpu)); + pr_debug("CPU%d: perf = %u, max. perf = %u, base perf = %d\n", cpu->cpu, cpu->capacity_perf, hybrid_max_perf_cpu->capacity_perf, cpu->pstate.max_pstate_physical); -- 2.25.1