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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>
This commit is contained in:
Paul Mackerras 2013-09-20 14:52:41 +10:00 committed by Alexander Graf
parent 388cc6e133
commit f3271d4c90
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kvm/book3s_hv.c
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@ -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", printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
vcpu->arch.trap, kvmppc_get_pc(vcpu), vcpu->arch.trap, kvmppc_get_pc(vcpu),
vcpu->arch.shregs.msr); vcpu->arch.shregs.msr);
run->hw.hardware_exit_reason = vcpu->arch.trap;
r = RESUME_HOST; r = RESUME_HOST;
BUG();
break; break;
} }