---

yaml
---
r: 172287
b: refs/heads/master
c: 0cca790
h: refs/heads/master
i:
  172285: bb8e751
  172283: a61b06a
  172279: 83e4124
  172271: 8cfcc8e
  172255: be21e14
  172223: 812ea17
  172159: f17d70a
  172031: 34ad129
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b820cc0ca20fdcf8014d8e57421cf29095e39392
+refs/heads/master: 0cca790753bf0cab4b070801a46df8e1297c17f6

trunk/arch/x86/kvm/x86.c

@@ -1326,6 +1326,8 @@ long kvm_arch_dev_ioctl(struct file *filp,
 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 {
 	kvm_x86_ops->vcpu_load(vcpu, cpu);
+	if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0))
+		per_cpu(cpu_tsc_khz, cpu) = cpufreq_quick_get(cpu);
 	kvm_request_guest_time_update(vcpu);
 }
 
@@ -3063,9 +3065,6 @@ static void bounce_off(void *info)
 	/* nothing */
 }
 
-static unsigned int  ref_freq;
-static unsigned long tsc_khz_ref;
-
 static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
 				     void *data)
 {
@@ -3074,14 +3073,11 @@ static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long va
 	struct kvm_vcpu *vcpu;
 	int i, send_ipi = 0;
 
-	if (!ref_freq)
-		ref_freq = freq->old;
-
 	if (val == CPUFREQ_PRECHANGE && freq->old > freq->new)
 		return 0;
 	if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new)
 		return 0;
-	per_cpu(cpu_tsc_khz, freq->cpu) = cpufreq_scale(tsc_khz_ref, ref_freq, freq->new);
+	per_cpu(cpu_tsc_khz, freq->cpu) = freq->new;
 
 	spin_lock(&kvm_lock);
 	list_for_each_entry(kvm, &vm_list, vm_list) {
@@ -3122,12 +3118,14 @@ static void kvm_timer_init(void)
 {
 	int cpu;
 
-	for_each_possible_cpu(cpu)
-		per_cpu(cpu_tsc_khz, cpu) = tsc_khz;
 	if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
-		tsc_khz_ref = tsc_khz;
 		cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,
 					  CPUFREQ_TRANSITION_NOTIFIER);
+		for_each_online_cpu(cpu)
+			per_cpu(cpu_tsc_khz, cpu) = cpufreq_get(cpu);
+	} else {
+		for_each_possible_cpu(cpu)
+			per_cpu(cpu_tsc_khz, cpu) = tsc_khz;
 	}
 }
 
@@ -4700,6 +4698,14 @@ int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
 
 int kvm_arch_hardware_enable(void *garbage)
 {
+	/*
+	 * Since this may be called from a hotplug notifcation,
+	 * we can't get the CPU frequency directly.
+	 */
+	if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
+		int cpu = raw_smp_processor_id();
+		per_cpu(cpu_tsc_khz, cpu) = 0;
+	}
 	return kvm_x86_ops->hardware_enable(garbage);
 }