Commit f3271d4c authored Sep 20, 2013 by Paul Mackerras Committed by Alexander Graf Oct 17, 2013

KVM: PPC: Book3S HV: Don't crash host on unknown guest interrupt



If we come out of a guest with an interrupt that we don't know about,
instead of crashing the host with a BUG(), we now return to userspace
with the exit reason set to KVM_EXIT_UNKNOWN and the trap vector in
the hw.hardware_exit_reason field of the kvm_run structure, as is done
on x86.  Note that run->exit_reason is already set to KVM_EXIT_UNKNOWN
at the beginning of kvmppc_handle_exit().

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>

parent 388cc6e1

arch/powerpc/kvm/book3s_hv.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -709,8 +709,8 @@ static int kvmppc_handle_exit(struct kvm_run run, struct kvm_vcpu vcpu,
		printk(KERN_EMERG "trap=0x%x \| pc=0x%lx \| msr=0x%llx\n",
		vcpu->arch.trap, kvmppc_get_pc(vcpu),
		vcpu->arch.shregs.msr);
		run->hw.hardware_exit_reason = vcpu->arch.trap;
		r = RESUME_HOST;
		BUG();
		break;
		}