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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 <sean.j.christopherson@intel.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	stable@vger.kernel.org
Subject: [PATCH v3 1/3] KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled
Date: Fri, 31 Jul 2020 11:12:19 +0800	[thread overview]
Message-ID: <1596165141-28874-1-git-send-email-wanpengli@tencent.com> (raw)

From: Wanpeng Li <wanpengli@tencent.com>

Prevent setting the tscdeadline timer if the lapic is hw disabled.

Fixes: bce87cce88 (KVM: x86: consolidate different ways to test for in-kernel LAPIC)
Cc: <stable@vger.kernel.org>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
v1 -> v2:
 * add Fixes tag and cc stable

 arch/x86/kvm/lapic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 5bf72fc..4ce2ddd 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2195,7 +2195,7 @@ void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data)
 {
 	struct kvm_lapic *apic = vcpu->arch.apic;
 
-	if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) ||
+	if (!kvm_apic_present(vcpu) || apic_lvtt_oneshot(apic) ||
 			apic_lvtt_period(apic))
 		return;
 
-- 
2.7.4


             reply	other threads:[~2020-07-31  3:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-31  3:12 Wanpeng Li [this message]
2020-07-31  3:12 ` [PATCH v3 2/3] KVM: LAPIC: Set the TDCR settable bits Wanpeng Li
2020-07-31  3:12 ` [PATCH v3 3/3] KVM: SVM: Fix disable pause loop exit/pause filtering capability on SVM Wanpeng Li
2020-07-31  7:21   ` Paolo Bonzini
2020-07-31  9:44     ` Wanpeng Li
2020-07-31  7:18 ` [PATCH v3 1/3] KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled Paolo Bonzini

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