KVM: s390: Add operation exception interception handler
This commit introduces code that handles operation exception
interceptions. With this handler we can emulate instructions by using
illegal opcodes.
Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index 2e6b54e..09c13db 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -349,6 +349,15 @@
return -EOPNOTSUPP;
}
+static int handle_operexc(struct kvm_vcpu *vcpu)
+{
+ vcpu->stat.exit_operation_exception++;
+ trace_kvm_s390_handle_operexc(vcpu, vcpu->arch.sie_block->ipa,
+ vcpu->arch.sie_block->ipb);
+
+ return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
+}
+
int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
{
if (kvm_is_ucontrol(vcpu->kvm))
@@ -370,6 +379,8 @@
return handle_validity(vcpu);
case 0x28:
return handle_stop(vcpu);
+ case 0x2c:
+ return handle_operexc(vcpu);
case 0x38:
return handle_partial_execution(vcpu);
default: