@@ -418,12 +418,22 @@ static void amd_pstate_boost_init(struct amd_cpudata *cpudata)
amd_pstate_driver.boost_enabled = true;
}
+static void amd_perf_ctl_reset(unsigned int cpu)
+{
+ wrmsrl_on_cpu(cpu, MSR_AMD_PERF_CTL, 0);
+}
+
static int amd_pstate_cpu_init(struct cpufreq_policy *policy)
{
int min_freq, max_freq, nominal_freq, lowest_nonlinear_freq, ret;
struct device *dev;
struct amd_cpudata *cpudata;
+ /*
+ * Resetting PERF_CTL_MSR will put the CPU in P0 frequency,
+ * which is ideal for initialization process.
+ */
+ amd_perf_ctl_reset(policy->cpu);
dev = get_cpu_device(policy->cpu);
if (!dev)
return -ENODEV;