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    Subject[PATCH v2 17/18] KVM: x86: Force kvm_rebooting=true during emergency reboot/crash
    From
    Set kvm_rebooting when virtualization is disabled in an emergency so that
    KVM eats faults on virtualization instructions even if kvm_reboot() isn't
    reached.

    Signed-off-by: Sean Christopherson <seanjc@google.com>
    ---
    arch/x86/kvm/svm/svm.c | 2 ++
    arch/x86/kvm/vmx/vmx.c | 2 ++
    2 files changed, 4 insertions(+)

    diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
    index 2db03991dcdf..30f7840151be 100644
    --- a/arch/x86/kvm/svm/svm.c
    +++ b/arch/x86/kvm/svm/svm.c
    @@ -608,6 +608,8 @@ static inline void kvm_cpu_svm_disable(void)

    static void svm_emergency_disable(void)
    {
    + kvm_rebooting = true;
    +
    kvm_cpu_svm_disable();
    }

    diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
    index 374e3ddbd476..8626010f5d54 100644
    --- a/arch/x86/kvm/vmx/vmx.c
    +++ b/arch/x86/kvm/vmx/vmx.c
    @@ -770,6 +770,8 @@ static void vmx_emergency_disable(void)
    int cpu = raw_smp_processor_id();
    struct loaded_vmcs *v;

    + kvm_rebooting = true;
    +
    list_for_each_entry(v, &per_cpu(loaded_vmcss_on_cpu, cpu),
    loaded_vmcss_on_cpu_link)
    vmcs_clear(v->vmcs);
    --
    2.40.0.rc1.284.g88254d51c5-goog
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