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 dGPU prime feature. Without correct stride,
dGPU can not blit data to virtio iGPU correctly. 

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 qemu side:
https:
//lore.kernel.org/qemu-devel/20231110074027.24862-1-julia.zhang@amd.com/T/#t

v1 of kernel side:
 https:
//lore.kernel.org/xen-devel/20231110074027.24862-1-julia.zhang@amd.com/T/#t

Daniel Stone (1):
  virgl: Implement resource_query_layout

 hw/display/virtio-gpu-base.c                |  4 +++
 hw/display/virtio-gpu-virgl.c               | 40 +++++++++++++++++++++
 include/hw/virtio/virtio-gpu-bswap.h        |  7 ++++
 include/standard-headers/linux/virtio_gpu.h | 30 ++++++++++++++++
 meson.build                                 |  4 +++
 5 files changed, 85 insertions(+)

-- 
2.34.1