cpufreq: intel_pstate: disable HWP notifications

Disable HWP Interrupt notification before enabling HWP. Since we don't
have HWP interrupt handling for possible performance interrupts, there
is not much use of enabling HWP interrupts.

Signed-off-by: Srinivas Pandruvada <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index ebe8506ba285c79ca1f2e47374463993052f8110..937667065d31ad15d023e9f22d97f4f92bef92d4 100644 (file)
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -534,6 +534,9 @@ static void __init intel_pstate_sysfs_expose_params(void)
 
 static void intel_pstate_hwp_enable(struct cpudata *cpudata)
 {
+       /* First disable HWP notification interrupt as we don't process them */
+       wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_INTERRUPT, 0x00);
+
        wrmsrl_on_cpu(cpudata->cpu, MSR_PM_ENABLE, 0x1);
 }