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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2021-08-20 05:40:05 +0300
committerDaniel Lezcano <daniel.lezcano@linaro.org>2021-09-09 17:33:20 +0300
commit5950fc44a57ace59f21dccfd792250019348a182 (patch)
tree61706d4b98778f40bbb345ffa7b7ca01b0d83857 /drivers/thermal
parent0284b52e85341e3cd4b70c8b2423fd23b8a003a8 (diff)
downloadlinux-5950fc44a57ace59f21dccfd792250019348a182.tar.xz
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
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/intel/therm_throt.c7
-rw-r--r--drivers/thermal/intel/thermal_interrupt.h3
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/thermal/intel/therm_throt.c b/drivers/thermal/intel/therm_throt.c
index 99abdc03c44c..dab7e8fb1059 100644
--- 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 53f427bb58dc..01e7bed2ffc7 100644
--- 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 */