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>

diff --git a/tools/testing/selftests/kvm/s390x/ucontrol_test.c b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
index b003abda8495d0a7d25e47641f63dcbeaf280a4a..8f306395696ec4ca91487d44a1a20d5ec51931b2 100644 (file)
--- a/tools/testing/selftests/kvm/s390x/ucontrol_test.c
+++ b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
@@ -783,4 +783,23 @@ 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