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authorJiang, Yunhong <yunhong.jiang@intel.com>2016-07-21 17:36:40 +0000
committerGerrit Code Review <gerrit@172.30.200.206>2016-07-21 17:36:40 +0000
commit47cb49e9bd088f1ff1b9ddbc36a1a02dd9f2c8f1 (patch)
tree4f320d5398c464aa43b06e8ae3950613692aa40f /kernel/arch/x86/kvm
parent9b50e9b415453b5a1f59a9f27ab64dcccf5abe9f (diff)
parent4304209a4fdfc9b1b8be8f0937ba6a7b7e3557a0 (diff)
Merge "KVM: vmx: fix missed cancellation of TSC deadline timer"
Diffstat (limited to 'kernel/arch/x86/kvm')
-rw-r--r--kernel/arch/x86/kvm/lapic.c48
1 files changed, 24 insertions, 24 deletions
diff --git a/kernel/arch/x86/kvm/lapic.c b/kernel/arch/x86/kvm/lapic.c
index e19426843..3d1b17068 100644
--- a/kernel/arch/x86/kvm/lapic.c
+++ b/kernel/arch/x86/kvm/lapic.c
@@ -1311,27 +1311,35 @@ void kvm_lapic_expired_hv_timer(struct kvm_vcpu *vcpu)
}
EXPORT_SYMBOL_GPL(kvm_lapic_expired_hv_timer);
+static bool start_hv_tscdeadline(struct kvm_lapic *apic)
+{
+ u64 tscdeadline = apic->lapic_timer.tscdeadline;
+
+ if (atomic_read(&apic->lapic_timer.pending) ||
+ kvm_x86_ops->set_hv_timer(apic->vcpu, tscdeadline)) {
+ if (apic->lapic_timer.hv_timer_in_use)
+ cancel_hv_tscdeadline(apic);
+ } else {
+ apic->lapic_timer.hv_timer_in_use = true;
+ hrtimer_cancel(&apic->lapic_timer.timer);
+
+ /* In case the sw timer triggered in the window */
+ if (atomic_read(&apic->lapic_timer.pending))
+ cancel_hv_tscdeadline(apic);
+ }
+ trace_kvm_hv_timer_state(apic->vcpu->vcpu_id,
+ apic->lapic_timer.hv_timer_in_use);
+ return apic->lapic_timer.hv_timer_in_use;
+}
+
void kvm_lapic_switch_to_hv_timer(struct kvm_vcpu *vcpu)
{
struct kvm_lapic *apic = vcpu->arch.apic;
WARN_ON(apic->lapic_timer.hv_timer_in_use);
- if (apic_lvtt_tscdeadline(apic) &&
- !atomic_read(&apic->lapic_timer.pending)) {
- u64 tscdeadline = apic->lapic_timer.tscdeadline;
-
- if (!kvm_x86_ops->set_hv_timer(vcpu, tscdeadline)) {
- apic->lapic_timer.hv_timer_in_use = true;
- hrtimer_cancel(&apic->lapic_timer.timer);
-
- /* In case the sw timer triggered in the window */
- if (atomic_read(&apic->lapic_timer.pending))
- cancel_hv_tscdeadline(apic);
- }
- trace_kvm_hv_timer_state(vcpu->vcpu_id,
- apic->lapic_timer.hv_timer_in_use);
- }
+ if (apic_lvtt_tscdeadline(apic))
+ start_hv_tscdeadline(apic);
}
EXPORT_SYMBOL_GPL(kvm_lapic_switch_to_hv_timer);
@@ -1398,15 +1406,7 @@ static void start_apic_timer(struct kvm_lapic *apic)
ktime_to_ns(ktime_add_ns(now,
apic->lapic_timer.period)));
} else if (apic_lvtt_tscdeadline(apic)) {
- /* lapic timer in tsc deadline mode */
- u64 tscdeadline = apic->lapic_timer.tscdeadline;
-
- if (kvm_x86_ops->set_hv_timer &&
- !kvm_x86_ops->set_hv_timer(apic->vcpu, tscdeadline)) {
- apic->lapic_timer.hv_timer_in_use = true;
- trace_kvm_hv_timer_state(apic->vcpu->vcpu_id,
- apic->lapic_timer.hv_timer_in_use);
- } else
+ if (!(kvm_x86_ops->set_hv_timer && start_hv_tscdeadline(apic)))
start_sw_tscdeadline(apic);
}
}