Commit 6ae44e01 authored Jul 21, 2023 by Sean Christopherson

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



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>

parent 76ab8161

arch/x86/kvm/svm/svm.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -605,6 +605,8 @@ static inline void kvm_cpu_svm_disable(void)

		static void svm_emergency_disable(void)
		{
		kvm_rebooting = true;

		kvm_cpu_svm_disable();
		}

arch/x86/kvm/vmx/vmx.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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);