ACPI: CPPC: add sysfs entry for guaranteed performance

Expose the CPPC guaranteed performance as reported by the platform through
GuaranteedPerformanceRegister.

The current value is already read in cppc_get_perf_caps() and stored in
struct cppc_perf_caps (to be used by the intel_pstate driver), so only the
attribute itself needs to be defined.

Signed-off-by: Petr Tesařík <ptesarik@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index 1d857978f5f40753f0bafd591123b0db588df8da..9976bb57356e670d25a400e7a9de44230b49461c 100644 (file)
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -160,6 +160,7 @@ show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, highest_perf);
 show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_perf);
 show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, nominal_perf);
 show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_nonlinear_perf);
+show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, guaranteed_perf);
 show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_freq);
 show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, nominal_freq);
 
@@ -196,6 +197,7 @@ static struct attribute *cppc_attrs[] = {
        &highest_perf.attr,
        &lowest_perf.attr,
        &lowest_nonlinear_perf.attr,
+       &guaranteed_perf.attr,
        &nominal_perf.attr,
        &nominal_freq.attr,
        &lowest_freq.attr,