From: Ricardo Neri Date: Sat, 19 Apr 2025 02:55:04 +0000 (-0700) Subject: cpufreq: intel_pstate: Populate the cpu_capacity sysfs entries X-Git-Tag: v6.16-rc1~109^2~1^2~15 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=f1a50492f5bdb024a5eb4d1de6798369dbf93418;p=linux-block.git 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 --- 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);