github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 09:36:22 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/virtio: add VIRTGPU_PARAM_BLOB_ALIGNMENT to params

Browse Source 
Add VIRTGPU_PARAM_BLOB_ALIGNMENT as a param that can be read with
VIRTGPU_GETPARAM by userspace applications running in the guest to
obtain the host's page size and find out the right alignment to be used
in shared memory allocations.

Signed-off-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patch.msgid.link/20260428194450.518296-4-slp@redhat.com
This commit is contained in:
Sergio Lopez 2026-04-28 21:44:50 +02:00 committed by Dmitry Osipenko
parent 47248e0d82
commit 6bd7e82e26
2 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/virtio/virtgpu_ioctl.c
View File

@ -117,6 +117,11 @@ static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
case VIRTGPU_PARAM_EXPLICIT_DEBUG_NAME:
value = vgdev->has_context_init ? 1 : 0;
break;
case VIRTGPU_PARAM_BLOB_ALIGNMENT:
if (!vgdev->has_blob_alignment)
return -ENOENT;
value = vgdev->blob_alignment;
break;
default:
return -EINVAL;
}

1
include/uapi/drm/virtgpu_drm.h
View File

@ -98,6 +98,7 @@ struct drm_virtgpu_execbuffer {
#define VIRTGPU_PARAM_CONTEXT_INIT 6 /* DRM_VIRTGPU_CONTEXT_INIT */
#define VIRTGPU_PARAM_SUPPORTED_CAPSET_IDs 7 /* Bitmask of supported capability set ids */
#define VIRTGPU_PARAM_EXPLICIT_DEBUG_NAME 8 /* Ability to set debug name from userspace */
#define VIRTGPU_PARAM_BLOB_ALIGNMENT 9 /* Device alignment requirements for blobs */
struct drm_virtgpu_getparam {
__u64 param;