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authorKristen Carlson Accardi <kristen@linux.intel.com>2015-01-29 00:03:27 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-01-30 01:52:17 +0100
commitd01b1f48c5fd95901203bd830458eaf619ed6c47 (patch)
treedf29b42bb4495db5a24940b7a05c9cf888fb2150 /drivers/cpufreq/intel_pstate.c
parentintel_pstate: Add support for SkyLake (diff)
downloadlinux-d01b1f48c5fd95901203bd830458eaf619ed6c47.tar.xz
linux-d01b1f48c5fd95901203bd830458eaf619ed6c47.zip
intel_pstate: expose turbo range to sysfs
This patch adds "turbo_pct" to the intel_pstate sysfs interface. turbo_pct will display the percentage of the total supported pstates that are in the turbo range. This value is independent of whether turbo has been disabled or not. Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/intel_pstate.c')
-rw-r--r--drivers/cpufreq/intel_pstate.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 7d9f822f2031..ed6dd7dac094 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -338,6 +338,22 @@ static void __init intel_pstate_debug_expose_params(void)
return sprintf(buf, "%u\n", limits.object); \
}
+static ssize_t show_turbo_pct(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct cpudata *cpu;
+ int total, no_turbo, turbo_pct;
+ uint32_t turbo_fp;
+
+ cpu = all_cpu_data[0];
+
+ total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1;
+ no_turbo = cpu->pstate.max_pstate - cpu->pstate.min_pstate + 1;
+ turbo_fp = div_fp(int_tofp(no_turbo), int_tofp(total));
+ turbo_pct = 100 - fp_toint(mul_fp(turbo_fp, int_tofp(100)));
+ return sprintf(buf, "%u\n", turbo_pct);
+}
+
static ssize_t show_no_turbo(struct kobject *kobj,
struct attribute *attr, char *buf)
{
@@ -418,11 +434,13 @@ show_one(min_perf_pct, min_perf_pct);
define_one_global_rw(no_turbo);
define_one_global_rw(max_perf_pct);
define_one_global_rw(min_perf_pct);
+define_one_global_ro(turbo_pct);
static struct attribute *intel_pstate_attributes[] = {
&no_turbo.attr,
&max_perf_pct.attr,
&min_perf_pct.attr,
+ &turbo_pct.attr,
NULL
};