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[v2,2/7] virtio-gpu api: add blob userptr resource

Message ID 20250321080029.1715078-3-honglei1.huang@amd.com (mailing list archive)
State New
Headers show
Series *** Add virtio gpu userptr support *** | expand

Commit Message

Huang, Honglei1 March 21, 2025, 8 a.m. UTC 
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(+)
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Patch

diff --git a/include/uapi/linux/virtio_gpu.h b/include/uapi/linux/virtio_gpu.h
index 331fae983193..4da36a1e62c4 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,
 
@@ -405,6 +410,7 @@  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;