linux-kernel - [PATCH 01/14] KVM: x86: nSVM: restore int_vector in svm_clear

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Message-Id: <20210914154825.104886-2-mlevitsk@redhat.com>
Date:   Tue, 14 Sep 2021 18:48:12 +0300
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     kvm@...r.kernel.org
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Borislav Petkov <bp@...en8.de>, Bandan Das <bsd@...hat.com>,
        linux-kernel@...r.kernel.org (open list),
        Joerg Roedel <joro@...tes.org>, Ingo Molnar <mingo@...hat.com>,
        Wei Huang <wei.huang2@....com>,
        Sean Christopherson <seanjc@...gle.com>,
        linux-kselftest@...r.kernel.org (open list:KERNEL SELFTEST FRAMEWORK),
        Maxim Levitsky <mlevitsk@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Jim Mattson <jmattson@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
        Shuah Khan <shuah@...nel.org>,
        Wanpeng Li <wanpengli@...cent.com>
Subject: [PATCH 01/14] KVM: x86: nSVM: restore int_vector in svm_clear_vintr

In svm_clear_vintr we try to restore the virtual interrupt
injection that might be pending, but we fail to restore
the interrupt vector.

Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>
---
 arch/x86/kvm/svm/svm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 05e8d4d27969..b2e710a3fff6 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1566,6 +1566,8 @@ static void svm_clear_vintr(struct vcpu_svm *svm)
 
 		svm->vmcb->control.int_ctl |= svm->nested.ctl.int_ctl &
 			V_IRQ_INJECTION_BITS_MASK;
+
+		svm->vmcb->control.int_vector = svm->nested.ctl.int_vector;
 	}
 
 	vmcb_mark_dirty(svm->vmcb, VMCB_INTR);
-- 
2.26.3