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| author | Wanpeng Li <wanpengli@tencent.com> | 2019-07-06 09:26:50 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-07-17 18:21:22 +0200 |
| commit | 4d151bf3b89e71490e69defc811579b2bde617e2 (patch) | |
| tree | f5301385e5640fa6579c5f38dd59e8ff5b835ec1 /arch | |
| parent | 4d1a082da968ff0c9d7b69a7ec44e6be6fc6e213 (diff) | |
| download | linux-4d151bf3b89e71490e69defc811579b2bde617e2.tar.gz linux-4d151bf3b89e71490e69defc811579b2bde617e2.tar.bz2 linux-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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 8 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 |
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) |