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From: Wanpeng Li <kernellwp@gmail.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>
Subject: [PATCH v3 3/4] KVM: LAPIC: Ignore timer migration when lapic timer is injected by posted-interrupt
Date: Tue, 11 Jun 2019 20:17:08 +0800	[thread overview]
Message-ID: <1560255429-7105-4-git-send-email-wanpengli@tencent.com> (raw)
In-Reply-To: <1560255429-7105-1-git-send-email-wanpengli@tencent.com>

From: Wanpeng Li <wanpengli@tencent.com>

When lapic timer is injected by posted-interrupt, the emulated timer is
offload to the housekeeping cpu. The timer interrupt will be delivered
properly, no need to migrate timer.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
 arch/x86/kvm/lapic.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 020599f..c21bab2 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2532,7 +2532,8 @@ void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu)
 {
 	struct hrtimer *timer;
 
-	if (!lapic_in_kernel(vcpu))
+	if (!lapic_in_kernel(vcpu) ||
+		posted_interrupt_inject_timer_enabled(vcpu))
 		return;
 
 	timer = &vcpu->arch.apic->lapic_timer.timer;
-- 
2.7.4


  parent reply	other threads:[~2019-06-11 12:17 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-11 12:17 [PATCH v3 0/4] KVM: LAPIC: Implement Exitless Timer Wanpeng Li
2019-06-11 12:17 ` [PATCH v3 1/4] KVM: LAPIC: Make lapic timer unpinned when timer is injected by pi Wanpeng Li
2019-06-11 20:39   ` Marcelo Tosatti
2019-06-12  0:45     ` Wanpeng Li
2019-06-12 16:15       ` Marcelo Tosatti
2019-06-11 12:17 ` [PATCH v3 2/4] KVM: LAPIC: lapic timer interrupt is injected by posted interrupt Wanpeng Li
2019-06-11 20:18   ` Marcelo Tosatti
2019-06-12  1:48     ` Wanpeng Li
2019-06-12 15:22       ` Radim Krčmář
2019-06-12 21:51         ` Marcelo Tosatti
2019-06-11 12:17 ` Wanpeng Li [this message]
2019-06-11 12:17 ` [PATCH v3 4/4] KVM: LAPIC: add advance timer support to pi_inject_timer Wanpeng Li
2019-06-13  7:59 ` [PATCH v3 0/4] KVM: LAPIC: Implement Exitless Timer Maxim Levitsky
2019-06-13  8:25   ` Wanpeng Li
2019-06-13  9:49     ` Maxim Levitsky

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