From: Maxim Levitsky <mlevitsk@redhat.com>
To: kvm@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Sean Christopherson <seanjc@google.com>,
Wanpeng Li <wanpengli@tencent.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Joerg Roedel <joro@8bytes.org>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT
AND 64-BIT)),
x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
Jim Mattson <jmattson@google.com>,
Maxim Levitsky <mlevitsk@redhat.com>
Subject: [PATCH 04/10] KVM: SVM: add warning for mistmatch between AVIC state and AVIC access page state
Date: Wed, 23 Jun 2021 14:29:56 +0300 [thread overview]
Message-ID: <20210623113002.111448-5-mlevitsk@redhat.com> (raw)
In-Reply-To: <20210623113002.111448-1-mlevitsk@redhat.com>
It is never a good idea to enter a guest when the AVIC state doesn't match
the state of the AVIC MMIO memory slot.
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
arch/x86/kvm/svm/svm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 12c06ea28f5c..50405c561394 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3780,6 +3780,9 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
pre_svm_run(vcpu);
+ WARN_ON_ONCE(vcpu->kvm->arch.apic_access_memslot_enabled !=
+ kvm_vcpu_apicv_active(vcpu));
+
sync_lapic_to_cr8(vcpu);
if (unlikely(svm->asid != svm->vmcb->control.asid)) {
--
2.26.3
next prev parent reply other threads:[~2021-06-23 11:30 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-23 11:29 [PATCH 00/10] My AVIC patch queue Maxim Levitsky
2021-06-23 11:29 ` [PATCH 01/10] KVM: x86: extract block/allow guest enteries Maxim Levitsky
2021-06-23 11:29 ` [PATCH 02/10] KVM: x86: APICv: fix race in kvm_request_apicv_update on SVM Maxim Levitsky
2021-06-23 21:50 ` Paolo Bonzini
2021-06-24 8:07 ` Maxim Levitsky
2021-07-07 12:57 ` Maxim Levitsky
2021-07-07 13:58 ` Paolo Bonzini
2021-06-23 11:29 ` [PATCH 03/10] KVM: x86: rename apic_access_page_done to apic_access_memslot_enabled Maxim Levitsky
2021-06-23 21:50 ` Paolo Bonzini
2021-06-23 11:29 ` Maxim Levitsky [this message]
2021-06-23 21:53 ` [PATCH 04/10] KVM: SVM: add warning for mistmatch between AVIC state and AVIC access page state Paolo Bonzini
2021-06-24 8:13 ` Maxim Levitsky
2021-06-23 11:29 ` [PATCH 05/10] KVM: SVM: svm_set_vintr don't warn if AVIC is active but is about to be deactivated Maxim Levitsky
2021-06-23 11:29 ` [PATCH 06/10] KVM: SVM: tweak warning about enabled AVIC on nested entry Maxim Levitsky
2021-06-23 21:52 ` Paolo Bonzini
2021-06-23 11:29 ` [PATCH 07/10] KVM: SVM: use vmcb01 in svm_refresh_apicv_exec_ctrl Maxim Levitsky
2021-06-23 21:54 ` Paolo Bonzini
2021-06-24 8:16 ` Maxim Levitsky
2021-06-23 11:30 ` [PATCH 08/10] KVM: x86: APICv: drop immediate APICv disablement on current vCPU Maxim Levitsky
2021-06-23 11:30 ` [PATCH 09/10] KVM: SVM: call avic_vcpu_load/avic_vcpu_put when enabling/disabling AVIC Maxim Levitsky
2021-06-23 11:30 ` [PATCH 10/10] KVM: x86: hyper-v: Deactivate APICv only when AutoEOI feature is in use Maxim Levitsky
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