linux-kernel - [PATCH 1/9] KVM: x86: nSVM: leave nested mode on vCPU free

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Message-Id: <20221103135736.42295-2-mlevitsk@redhat.com>
Date:   Thu,  3 Nov 2022 15:57:28 +0200
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Shuah Khan <shuah@...nel.org>,
        Yang Zhong <yang.zhong@...el.com>,
        Wei Wang <wei.w.wang@...el.com>,
        Colton Lewis <coltonlewis@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Jim Mattson <jmattson@...gle.com>,
        Chenyi Qiang <chenyi.qiang@...el.com>,
        Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org,
        x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Peter Xu <peterx@...hat.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        linux-kselftest@...r.kernel.org, stable@...r.kernel.org
Subject: [PATCH 1/9] KVM: x86: nSVM: leave nested mode on vCPU free

If the VM was terminated while nested, we free the nested state
while the vCPU still is in nested mode.

Soon a warning will be added for this condition.

Cc: stable@...r.kernel.org
Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>
---
 arch/x86/kvm/svm/svm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index d22a809d923339..e9cec1b692051c 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1440,6 +1440,7 @@ static void svm_vcpu_free(struct kvm_vcpu *vcpu)
 	 */
 	svm_clear_current_vmcb(svm->vmcb);
 
+	svm_leave_nested(vcpu);
 	svm_free_nested(svm);
 
 	sev_free_vcpu(vcpu);
-- 
2.34.3