From: Honglei Huang <[email protected]> Add DRM ioctl flags and a userptr address field so userspace can request a blob backed by an existing process mapping.
UAPI changes: - Add guest-only VIRTGPU_BLOB_FLAG_USE_USERPTR and VIRTGPU_BLOB_FLAG_USERPTR_RDONLY flags - Add a userptr field to drm_virtgpu_resource_create_blob These flags select guest pin behavior in the ioctl. They are not part of the virtio CREATE_BLOB wire ABI. Signed-off-by: Honglei Huang <[email protected]> --- include/uapi/drm/virtgpu_drm.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/uapi/drm/virtgpu_drm.h b/include/uapi/drm/virtgpu_drm.h index 95587e12ae..6171b4e230 100644 --- a/include/uapi/drm/virtgpu_drm.h +++ b/include/uapi/drm/virtgpu_drm.h @@ -186,6 +186,9 @@ struct drm_virtgpu_resource_create_blob { #define VIRTGPU_BLOB_FLAG_USE_MAPPABLE 0x0001 #define VIRTGPU_BLOB_FLAG_USE_SHAREABLE 0x0002 #define VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE 0x0004 +/* Guest-only flags */ +#define VIRTGPU_BLOB_FLAG_USE_USERPTR 0x0008 +#define VIRTGPU_BLOB_FLAG_USERPTR_RDONLY 0x0010 /* zero is invalid blob_mem */ __u32 blob_mem; __u32 blob_flags; @@ -205,6 +208,13 @@ struct drm_virtgpu_resource_create_blob { #define DRM_VIRTGPU_BLOB_FLAG_HINT_DEFER_MAPPING 0x0001 __u32 blob_hints; __u32 pad2; + + /* + * userptr: guest userspace memory address for VIRTGPU_BLOB_FLAG_USE_USERPTR. + * Must be 0 if VIRTGPU_BLOB_FLAG_USE_USERPTR is not set. + * The driver will pin the user pages and allow the host to access them. + */ + __u64 userptr; }; #define VIRTGPU_CONTEXT_PARAM_CAPSET_ID 0x0001 -- 2.34.1
