linux-kernel - Re: [PATCH v2] KVM: nVMX: Fix nested bus lock VM exit

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Message-ID: <YUigOQ6wL/NSXqjO@google.com>
Date:   Mon, 20 Sep 2021 14:52:41 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Chenyi Qiang <chenyi.qiang@...el.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Xiaoyao Li <xiaoyao.li@...el.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] KVM: nVMX: Fix nested bus lock VM exit

On Tue, Sep 14, 2021, Chenyi Qiang wrote:
> Nested bus lock VM exits are not supported yet. If L2 triggers bus lock
> VM exit, it will be directed to L1 VMM, which would cause unexpected
> behavior. Therefore, handle L2's bus lock VM exits in L0 directly.
> 
> Fixes: fe6b6bc802b4 ("KVM: VMX: Enable bus lock VM exit")

Cc: stable@...r.kernel.org

> Signed-off-by: Chenyi Qiang <chenyi.qiang@...el.com>
> 
> ---

Reviewed-by: Sean Christopherson <seanjc@...gle.com>