[PATCH v2 2/2] KVM: selftests: Test invalid bits in kvm_valid_regs and kvm_dirty_regs on s390x

[Thomas Huth]

Now that we disallow invalid bits in kvm_valid_regs and kvm_dirty_regs
on s390x, too, we should also check this condition in the selftests.
The code has been taken from the x86-version of the sync_regs_test.

Reviewed-by: Janosch Frank <fran...@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntrae...@de.ibm.com>
Reviewed-by: Cornelia Huck <coh...@redhat.com>
Signed-off-by: Thomas Huth <th...@redhat.com>
---
 .../selftests/kvm/s390x/sync_regs_test.c      | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c 
b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
index bbc93094519b..d5290b4ad636 100644
--- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c
+++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c
@@ -85,6 +85,36 @@ int main(int argc, char *argv[])
 
        run = vcpu_state(vm, VCPU_ID);
 
+       /* Request reading invalid register set from VCPU. */
+       run->kvm_valid_regs = INVALID_SYNC_FIELD;
+       rv = _vcpu_run(vm, VCPU_ID);
+       TEST_ASSERT(rv < 0 && errno == EINVAL,
+                   "Invalid kvm_valid_regs did not cause expected KVM_RUN 
error: %d\n",
+                   rv);
+       vcpu_state(vm, VCPU_ID)->kvm_valid_regs = 0;
+
+       run->kvm_valid_regs = INVALID_SYNC_FIELD | TEST_SYNC_FIELDS;
+       rv = _vcpu_run(vm, VCPU_ID);
+       TEST_ASSERT(rv < 0 && errno == EINVAL,
+                   "Invalid kvm_valid_regs did not cause expected KVM_RUN 
error: %d\n",
+                   rv);
+       vcpu_state(vm, VCPU_ID)->kvm_valid_regs = 0;
+
+       /* Request setting invalid register set into VCPU. */
+       run->kvm_dirty_regs = INVALID_SYNC_FIELD;
+       rv = _vcpu_run(vm, VCPU_ID);
+       TEST_ASSERT(rv < 0 && errno == EINVAL,
+                   "Invalid kvm_dirty_regs did not cause expected KVM_RUN 
error: %d\n",
+                   rv);
+       vcpu_state(vm, VCPU_ID)->kvm_dirty_regs = 0;
+
+       run->kvm_dirty_regs = INVALID_SYNC_FIELD | TEST_SYNC_FIELDS;
+       rv = _vcpu_run(vm, VCPU_ID);
+       TEST_ASSERT(rv < 0 && errno == EINVAL,
+                   "Invalid kvm_dirty_regs did not cause expected KVM_RUN 
error: %d\n",
+                   rv);
+       vcpu_state(vm, VCPU_ID)->kvm_dirty_regs = 0;
+
        /* Request and verify all valid register sets. */
        run->kvm_valid_regs = TEST_SYNC_FIELDS;
        rv = _vcpu_run(vm, VCPU_ID);
-- 
2.18.1