s390/kvm: Interrupt injection bugfix
EXTERNAL_CALL and EMERGENCY type interrupts need to preserve their interrupt
code parameter when being injected from user space.
Signed-off-by: Jason J. Herne <jjherne@us.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index ff1e2f8..c30615e 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -629,11 +629,28 @@
break;
case KVM_S390_SIGP_STOP:
case KVM_S390_RESTART:
- case KVM_S390_INT_EXTERNAL_CALL:
- case KVM_S390_INT_EMERGENCY:
VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
inti->type = s390int->type;
break;
+ case KVM_S390_INT_EXTERNAL_CALL:
+ if (s390int->parm & 0xffff0000) {
+ kfree(inti);
+ return -EINVAL;
+ }
+ VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
+ s390int->parm);
+ inti->type = s390int->type;
+ inti->extcall.code = s390int->parm;
+ break;
+ case KVM_S390_INT_EMERGENCY:
+ if (s390int->parm & 0xffff0000) {
+ kfree(inti);
+ return -EINVAL;
+ }
+ VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm);
+ inti->type = s390int->type;
+ inti->emerg.code = s390int->parm;
+ break;
case KVM_S390_INT_VIRTIO:
case KVM_S390_INT_SERVICE:
default: