[PATCH v4 2/5] virtio-gpu api: add blob userptr resource

[Honglei Huang <honglei1.huang@amd.com>]

From: Honglei Huang <Honglei1.Huang@amd.com>

Add a new resource for blob resource, called userptr, used for let
host access guest user space memory, to acquire buffer based userptr
feature in virtio GPU.

- New flag VIRTIO_GPU_BLOB_FLAG_USE_USERPTR used in blob create
to indicate the blob create ioctl is used for create a userptr
blob resource.
- New resource type VIRTIO_GPU_F_RESOURCE_USERPTR is for feature
check and probe.

Signed-off-by: Honglei Huang <Honglei1.Huang@amd.com>
---
 include/uapi/linux/virtio_gpu.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/uapi/linux/virtio_gpu.h b/include/uapi/linux/virtio_gpu.h
index fbd1838d6..bf2d5f137 100644
--- a/include/uapi/linux/virtio_gpu.h
+++ b/include/uapi/linux/virtio_gpu.h
@@ -65,6 +65,11 @@
  */
 #define VIRTIO_GPU_F_CONTEXT_INIT        4
 
+/*
+ * VIRTGPU_BLOB_FLAG_USE_USERPTR
+ */
+#define VIRTIO_GPU_F_RESOURCE_USERPTR    5
+
 enum virtio_gpu_ctrl_type {
 	VIRTIO_GPU_UNDEFINED = 0,
 
@@ -406,6 +411,7 @@ struct virtio_gpu_resource_create_blob {
 #define VIRTIO_GPU_BLOB_FLAG_USE_MAPPABLE     0x0001
 #define VIRTIO_GPU_BLOB_FLAG_USE_SHAREABLE    0x0002
 #define VIRTIO_GPU_BLOB_FLAG_USE_CROSS_DEVICE 0x0004
+#define VIRTIO_GPU_BLOB_FLAG_USE_USERPTR      0x0008
 	/* zero is invalid blob mem */
 	__le32 blob_mem;
 	__le32 blob_flags;
-- 
2.34.1