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authorWanpeng Li <wanpengli@tencent.com>2019-07-06 09:26:50 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2019-07-17 18:21:22 +0200
commit4d151bf3b89e71490e69defc811579b2bde617e2 (patch)
treef5301385e5640fa6579c5f38dd59e8ff5b835ec1
parentKVM: x86/vPMU: reset pmc->counter to 0 for pmu fixed_counters (diff)
downloadlinux-dev-4d151bf3b89e71490e69defc811579b2bde617e2.tar.xz
linux-dev-4d151bf3b89e71490e69defc811579b2bde617e2.zip
KVM: LAPIC: Make lapic timer unpinned
Commit 61abdbe0bcc2 ("kvm: x86: make lapic hrtimer pinned") pinned the lapic timer to avoid to wait until the next kvm exit for the guest to see KVM_REQ_PENDING_TIMER set. There is another solution to give a kick after setting the KVM_REQ_PENDING_TIMER bit, make lapic timer unpinned will be used in follow up patches. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--arch/x86/kvm/lapic.c8
-rw-r--r--arch/x86/kvm/x86.c6
2 files changed, 5 insertions, 9 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index b7fda1dd3cc8..32b80ecc0ac5 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1567,7 +1567,7 @@ static void start_sw_tscdeadline(struct kvm_lapic *apic)
likely(ns > apic->lapic_timer.timer_advance_ns)) {
expire = ktime_add_ns(now, ns);
expire = ktime_sub_ns(expire, ktimer->timer_advance_ns);
- hrtimer_start(&ktimer->timer, expire, HRTIMER_MODE_ABS_PINNED);
+ hrtimer_start(&ktimer->timer, expire, HRTIMER_MODE_ABS);
} else
apic_timer_expired(apic);
@@ -1659,7 +1659,7 @@ static void start_sw_period(struct kvm_lapic *apic)
hrtimer_start(&apic->lapic_timer.timer,
apic->lapic_timer.target_expiration,
- HRTIMER_MODE_ABS_PINNED);
+ HRTIMER_MODE_ABS);
}
bool kvm_lapic_hv_timer_in_use(struct kvm_vcpu *vcpu)
@@ -2268,7 +2268,7 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu, int timer_advance_ns)
apic->vcpu = vcpu;
hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,
- HRTIMER_MODE_ABS_PINNED);
+ HRTIMER_MODE_ABS);
apic->lapic_timer.timer.function = apic_timer_fn;
if (timer_advance_ns == -1) {
apic->lapic_timer.timer_advance_ns = LAPIC_TIMER_ADVANCE_ADJUST_INIT;
@@ -2458,7 +2458,7 @@ void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu)
timer = &vcpu->arch.apic->lapic_timer.timer;
if (hrtimer_cancel(timer))
- hrtimer_start_expires(timer, HRTIMER_MODE_ABS_PINNED);
+ hrtimer_start_expires(timer, HRTIMER_MODE_ABS);
}
/*
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 9d7b9e6a0939..6ab30c5e1ae0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1456,12 +1456,8 @@ static void update_pvclock_gtod(struct timekeeper *tk)
void kvm_set_pending_timer(struct kvm_vcpu *vcpu)
{
- /*
- * Note: KVM_REQ_PENDING_TIMER is implicitly checked in
- * vcpu_enter_guest. This function is only called from
- * the physical CPU that is running vcpu.
- */
kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
+ kvm_vcpu_kick(vcpu);
}
static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)