Merge branches 'intel_pstate-fix' and 'cpufreq-x86-fix'

* intel_pstate-fix: cpufreq: intel_pstate: report correct CPU frequencies during trace * cpufreq-x86-fix: cpufreq: x86: Disable interrupts during MSRs reading
mariux64 · Aug 17, 2017 · 8179962 · 8179962
3 parents ef95484 + c587c79 + 8e2f3bc
commit 8179962
Show file tree

Hide file tree

Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/arch/x86/kernel/cpu/aperfmperf.c b/arch/x86/kernel/cpu/aperfmperf.c
@@ -40,13 +40,16 @@ static void aperfmperf_snapshot_khz(void *dummy)
 	struct aperfmperf_sample *s = this_cpu_ptr(&samples);
 	ktime_t now = ktime_get();
 	s64 time_delta = ktime_ms_delta(now, s->time);
+	unsigned long flags;
 
 	/* Don't bother re-computing within the cache threshold time. */
 	if (time_delta < APERFMPERF_CACHE_THRESHOLD_MS)
 		return;
 
+	local_irq_save(flags);
 	rdmsrl(MSR_IA32_APERF, aperf);
 	rdmsrl(MSR_IA32_MPERF, mperf);
+	local_irq_restore(flags);
 
 	aperf_delta = aperf - s->aperf;
 	mperf_delta = mperf - s->mperf;

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
@@ -1613,8 +1613,7 @@ static inline bool intel_pstate_sample(struct cpudata *cpu, u64 time)
 
 static inline int32_t get_avg_frequency(struct cpudata *cpu)
 {
-	return mul_ext_fp(cpu->sample.core_avg_perf,
-			  cpu->pstate.max_pstate_physical * cpu->pstate.scaling);
+	return mul_ext_fp(cpu->sample.core_avg_perf, cpu_khz);
 }
 
 static inline int32_t get_avg_pstate(struct cpudata *cpu)