[RFC PATCH 08/55] KVM: selftests: Cover plane run-state ioctls in planes_test

[David Woodhouse]

From: David Woodhouse <dwmw@xxxxxxxxxxxx>

Assert the initial stopped state of a new plane-1 vCPU, a runnable and
back-to-stopped round trip, and rejection of out-of-range states.

The tools copy of linux/kvm.h picks up the plane run-state ioctl
definitions.

Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Assisted-by: LLM
---
 tools/include/uapi/linux/kvm.h                |  4 ++++
 tools/testing/selftests/kvm/x86/planes_test.c | 22 +++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h
index 586c0d6c168c..8d9f7e6bba19 100644
--- a/tools/include/uapi/linux/kvm.h
+++ b/tools/include/uapi/linux/kvm.h
@@ -1370,6 +1370,10 @@ struct kvm_s390_keyop {
 #define KVM_HAS_DEVICE_ATTR	  _IOW(KVMIO,  0xe3, struct kvm_device_attr)
 
 #define KVM_CREATE_PLANE	  _IO(KVMIO, 0xe4)
+#define KVM_GET_PLANE_RUN_STATE	  _IOR(KVMIO, 0xe5, __u32)
+#define KVM_SET_PLANE_RUN_STATE	  _IOW(KVMIO, 0xe6, __u32)
+#define   KVM_PLANE_RUN_STATE_STOPPED	0
+#define   KVM_PLANE_RUN_STATE_RUNNABLE	1
 
 /*
  * ioctls for vcpu fds
diff --git a/tools/testing/selftests/kvm/x86/planes_test.c b/tools/testing/selftests/kvm/x86/planes_test.c
index 3517175580d3..b28ed4077715 100644
--- a/tools/testing/selftests/kvm/x86/planes_test.c
+++ b/tools/testing/selftests/kvm/x86/planes_test.c
@@ -89,6 +89,28 @@ static void test_plane_lifecycle(void)
 	TEST_ASSERT(vcpu1_fd >= 0,
 		    "KVM_CREATE_VCPU on plane 1 failed: errno %d", errno);
 
+	/* Plane 1 starts stopped; run state is readable and writable. */
+	{
+		u32 state = 0xff;
+
+		kvm_ioctl(vcpu1_fd, KVM_GET_PLANE_RUN_STATE, &state);
+		TEST_ASSERT_EQ(state, KVM_PLANE_RUN_STATE_STOPPED);
+
+		state = KVM_PLANE_RUN_STATE_RUNNABLE;
+		kvm_ioctl(vcpu1_fd, KVM_SET_PLANE_RUN_STATE, &state);
+		state = 0xff;
+		kvm_ioctl(vcpu1_fd, KVM_GET_PLANE_RUN_STATE, &state);
+		TEST_ASSERT_EQ(state, KVM_PLANE_RUN_STATE_RUNNABLE);
+
+		state = KVM_PLANE_RUN_STATE_STOPPED;
+		kvm_ioctl(vcpu1_fd, KVM_SET_PLANE_RUN_STATE, &state);
+
+		state = 2;
+		TEST_ASSERT_EQ(__kvm_ioctl(vcpu1_fd, KVM_SET_PLANE_RUN_STATE,
+					   &state), -1);
+		TEST_ASSERT_EQ(errno, EINVAL);
+	}
+
 	/* Register state is per plane: write plane 1, plane 0 unaffected. */
 	kvm_ioctl(vcpu1_fd, KVM_GET_REGS, &regs1);
 	regs1.rbx = 0x5157ca11;	/* arbitrary marker */
-- 
2.50.1