From: Wanpeng Li <kernellwp@gmail.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>
Subject: [PATCH v2] KVM: LAPIC: Advancing the timer expiration on guest initiated write
Date: Thu, 4 Mar 2021 08:35:18 +0800 [thread overview]
Message-ID: <1614818118-965-1-git-send-email-wanpengli@tencent.com> (raw)
From: Wanpeng Li <wanpengli@tencent.com>
Advancing the timer expiration should only be necessary on guest initiated
writes. When we cancel the timer and clear .pending during state restore,
clear expired_tscdeadline as well.
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
v1 -> v2:
* update patch description
arch/x86/kvm/lapic.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 45d40bf..f2b6e79 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2595,6 +2595,7 @@ int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s)
apic_update_ppr(apic);
hrtimer_cancel(&apic->lapic_timer.timer);
+ apic->lapic_timer.expired_tscdeadline = 0;
apic_update_lvtt(apic);
apic_manage_nmi_watchdog(apic, kvm_lapic_get_reg(apic, APIC_LVT0));
update_divide_count(apic);
--
2.7.4
next reply other threads:[~2021-03-04 1:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 0:35 Wanpeng Li [this message]
2021-03-11 3:08 ` [PATCH v2] KVM: LAPIC: Advancing the timer expiration on guest initiated write Wanpeng Li
2021-03-12 18:12 ` Paolo Bonzini
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