thermal/drivers/intel: Allow processing of HWP interrupt

Add a weak function to process HWP (Hardware P-states) notifications and
move updating HWP_STATUS MSR to this function.

This allows HWP interrupts to be processed by the intel_pstate driver in
HWP mode by overriding the implementation.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210820024006.2347720-1-srinivas.pandruvada@linux.intel.com

diff --git a/drivers/thermal/intel/therm_throt.c b/drivers/thermal/intel/therm_throt.c
index 99abdc0..dab7e8f 100644 (file)
--- a/drivers/thermal/intel/therm_throt.c
+++ b/drivers/thermal/intel/therm_throt.c
@@ -569,13 +569,18 @@ static void notify_thresholds(__u64 msr_val)
                platform_thermal_notify(msr_val);
 }
 
+void __weak notify_hwp_interrupt(void)
+{
+       wrmsrl_safe(MSR_HWP_STATUS, 0);
+}
+
 /* Thermal transition interrupt handler */
 void intel_thermal_interrupt(void)
 {
        __u64 msr_val;
 
        if (static_cpu_has(X86_FEATURE_HWP))
-               wrmsrl_safe(MSR_HWP_STATUS, 0);
+               notify_hwp_interrupt();
 
        rdmsrl(MSR_IA32_THERM_STATUS, msr_val);
 

diff --git a/drivers/thermal/intel/thermal_interrupt.h b/drivers/thermal/intel/thermal_interrupt.h
index 53f427b..01e7bed 100644 (file)
--- a/drivers/thermal/intel/thermal_interrupt.h
+++ b/drivers/thermal/intel/thermal_interrupt.h
@@ -12,4 +12,7 @@ extern int (*platform_thermal_notify)(__u64 msr_val);
  * callback has rate control */
 extern bool (*platform_thermal_package_rate_control)(void);
 
+/* Handle HWP interrupt */
+extern void notify_hwp_interrupt(void);
+
 #endif /* _INTEL_THERMAL_INTERRUPT_H */