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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>,
	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 2/2] KVM: LAPIC: reset TMCCT during vCPU reset
Date: Thu,  3 Jun 2021 02:00:41 -0700	[thread overview]
Message-ID: <1622710841-76604-2-git-send-email-wanpengli@tencent.com> (raw)
In-Reply-To: <1622710841-76604-1-git-send-email-wanpengli@tencent.com>

From: Wanpeng Li <wanpengli@tencent.com>

The value of current counter register after reset is 0 for both Intel 
and AMD, let's do it in kvm.

Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
 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 20dd2ae..9ba539b 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2352,6 +2352,7 @@ void kvm_lapic_reset(struct kvm_vcpu *vcpu, bool init_event)
 	kvm_lapic_set_reg(apic, APIC_ICR2, 0);
 	kvm_lapic_set_reg(apic, APIC_TDCR, 0);
 	kvm_lapic_set_reg(apic, APIC_TMICT, 0);
+	kvm_lapic_set_reg(apic, APIC_TMCCT, 0);
 	for (i = 0; i < 8; i++) {
 		kvm_lapic_set_reg(apic, APIC_IRR + 0x10 * i, 0);
 		kvm_lapic_set_reg(apic, APIC_ISR + 0x10 * i, 0);
-- 
2.7.4


  reply	other threads:[~2021-06-03  9:02 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-03  9:00 [PATCH 1/2] KVM: LAPIC: write 0 to TMICT should also cancel vmx-preemption timer Wanpeng Li
2021-06-03  9:00 ` Wanpeng Li [this message]
2021-06-03 12:27   ` [PATCH 2/2] KVM: LAPIC: reset TMCCT during vCPU reset Jim Mattson
2021-06-03 15:34     ` Sean Christopherson
2021-06-08  0:31       ` Wanpeng Li
2021-06-03 15:20 ` [PATCH 1/2] KVM: LAPIC: write 0 to TMICT should also cancel vmx-preemption timer Sean Christopherson
2021-06-04  0:36   ` Wanpeng Li
2021-06-04 15:37     ` Sean Christopherson
2021-06-08  0:30       ` Wanpeng Li
2021-06-03 23:02 ` David Matlack
2021-06-04  0:32   ` Wanpeng Li
2021-06-04 15:59     ` David Matlack

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