Hi all, Sorry to late reply. This is v2 of the implementation of resource_query_layout. This adds a new ioctl to let guest query information of host resource, which is originally from Daniel Stone. We add some changes to support query the correct stride of host resource before it's created, which is to support to blit data from dGPU to virtio iGPU for dGPU prime feature. Changes from v1 to v2: -Squash two patches to a single patch. -A small modification of VIRTIO_GPU_F_RESOURCE_QUERY_LAYOUT Below is description of v1: This add implementation of resource_query_layout to get the information of how the host has actually allocated the buffer. This function is now used to query the stride for guest linear resource for dGPU prime on guest VMs. v1 of kernel side: https: //lore.kernel.org/xen-devel/20231110074027.24862-1-julia.zhang@xxxxxxx/T/#t v1 of qemu side: https: //lore.kernel.org/qemu-devel/20231110074027.24862-1-julia.zhang@xxxxxxx/T/#t Daniel Stone (1): drm/virtio: Implement RESOURCE_GET_LAYOUT ioctl drivers/gpu/drm/virtio/virtgpu_drv.c | 1 + drivers/gpu/drm/virtio/virtgpu_drv.h | 22 ++++++++- drivers/gpu/drm/virtio/virtgpu_ioctl.c | 66 ++++++++++++++++++++++++++ drivers/gpu/drm/virtio/virtgpu_kms.c | 8 +++- drivers/gpu/drm/virtio/virtgpu_vq.c | 63 ++++++++++++++++++++++++ include/uapi/drm/virtgpu_drm.h | 21 ++++++++ include/uapi/linux/virtio_gpu.h | 30 ++++++++++++ 7 files changed, 208 insertions(+), 3 deletions(-) -- 2.34.1
