KVM: s390: selftests: Add ucontrol gis routing test

JIRA: https://issues.redhat.com/browse/RHEL-113440

commit b1da33b
Author: Christoph Schlameuss <schlameuss@linux.ibm.com>
Date:   Mon Dec 16 10:21:38 2024 +0100

    KVM: s390: selftests: Add ucontrol gis routing test

    Add a selftests for the interrupt routing configuration when using
    ucontrol VMs.

    Calling the test may trigger a null pointer dereferences on kernels not
    containing the fixes in this patch series.

    Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
    Tested-by: Hariharan Mari <hari55@linux.ibm.com>
    Reviewed-by: Hariharan Mari <hari55@linux.ibm.com>
    Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
    Link: https://lore.kernel.org/r/20241216092140.329196-5-schlameuss@linux.ibm.com
    Message-ID: <20241216092140.329196-5-schlameuss@linux.ibm.com>
    Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

Signed-off-by: Thomas Huth <thuth@redhat.com>

Author: huth

tools/testing/selftests/kvm/s390/ucontrol_test.c

@@ -775,4 +775,23 @@ TEST_F(uc_kvm, uc_flic_attrs)
 	close(cd.fd);
 }
 
+TEST_F(uc_kvm, uc_set_gsi_routing)
+{
+	struct kvm_irq_routing *routing = kvm_gsi_routing_create();
+	struct kvm_irq_routing_entry ue = {
+		.type = KVM_IRQ_ROUTING_S390_ADAPTER,
+		.gsi = 1,
+		.u.adapter = (struct kvm_irq_routing_s390_adapter) {
+			.ind_addr = 0,
+		},
+	};
+	int rc;
+
+	routing->entries[0] = ue;
+	routing->nr = 1;
+	rc = ioctl(self->vm_fd, KVM_SET_GSI_ROUTING, routing);
+	ASSERT_EQ(-1, rc) TH_LOG("err %s (%i)", strerror(errno), errno);
+	ASSERT_EQ(EINVAL, errno) TH_LOG("err %s (%i)", strerror(errno), errno);
+}
+
 TEST_HARNESS_MAIN