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thermal: 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: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Srinivas Pandruvada 2021-08-19 19:40:05 -07:00 committed by Rafael J. Wysocki
parent 43dde64bb1
commit 950809cd6c
2 changed files with 9 additions and 1 deletions
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7
drivers/thermal/intel/therm_throt.c
View File

@ -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);

3
drivers/thermal/intel/thermal_interrupt.h
View File

@ -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 */