Commit f1a50492 authored by Ricardo Neri's avatar Ricardo Neri Committed by Rafael J. Wysocki
Browse files

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: default avatarRicardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 6bceea7a

drivers/cpufreq/intel_pstate.c

+2 −0
Original line number Diff line number Diff line
@@ -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);