KVM: SVM: Defer nmi processing until switch to host state is complete



If we stgi() too soon, nmis can reach the processor even though interrupts
are disabled, catching it in a half-switched state.  Delay the stgi() until
we're done switching.

Signed-off-by: Avi Kivity <avi@qumranet.com>

parent 70433389

drivers/kvm/svm.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -1585,10 +1585,6 @@ static void svm_vcpu_run(struct kvm_vcpu vcpu, struct kvm_run kvm_run)
		#endif
		: "cc", "memory" );

		local_irq_disable();

		stgi();

		if ((svm->vmcb->save.dr7 & 0xff))
		load_db_regs(svm->host_db_regs);

		@@ -1605,6 +1601,10 @@ static void svm_vcpu_run(struct kvm_vcpu vcpu, struct kvm_run kvm_run)

		reload_tss(vcpu);

		local_irq_disable();

		stgi();

		svm->next_rip = 0;
		}