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KVM: x86: Force kvm_rebooting=true during emergency reboot/crash

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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.

Reviewed-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20230721201859.2307736-18-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2023-07-21 13:18:57 -07:00
parent 76ab816108
commit 6ae44e012f
2 changed files with 4 additions and 0 deletions
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2
arch/x86/kvm/svm/svm.c
View File

@ -605,6 +605,8 @@ fault:
static void svm_emergency_disable(void)
{
kvm_rebooting = true;
kvm_cpu_svm_disable();
}

2
arch/x86/kvm/vmx/vmx.c
View File

@ -752,6 +752,8 @@ 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);