[RFC,0/2] Virtio-GPU suspend and resume

Message

Kim, Dongwon April 18, 2025, 11:29 p.m. UTC

From: Dongwon Kim <[e-mail]>

This patch series introduces a freeze and restore mechanism for
the virtio-gpu driver:

First patch adds `virtgpu_freeze` and `virtgpu_restore` functions.
These functions handle the deletion of virtio queues before suspension and
their recreation during the restoration process.

Second patch implements a mechanism for restoring `virtio_gpu_object` instances.
This is necessary because the host (QEMU) deletes all associated resources during
the virtio-gpu reset, which occurs as part of the restoration process.

These changes ensure that the virtio-gpu driver can properly handle suspend and
resume scenarios without resource loss.

Dongwon Kim (2):
  drm/virtio: Freeze and restore hooks to support suspend and resume
  drm/virtio: Implement save and restore for virtio_gpu_objects

 drivers/gpu/drm/virtio/virtgpu_drv.c    | 59 +++++++++++++++++++++-
 drivers/gpu/drm/virtio/virtgpu_drv.h    | 11 +++++
 drivers/gpu/drm/virtio/virtgpu_kms.c    | 24 ++++++---
 drivers/gpu/drm/virtio/virtgpu_object.c | 65 +++++++++++++++++++++++++
 4 files changed, 152 insertions(+), 7 deletions(-)