drm/virtio: Add support for saving and restoring virtio_gpu_objects

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When the host KVM/QEMU resumes from hibernation, it loses all graphics
resources previously submitted by the guest OS, as the QEMU process is
terminated during the suspend-resume cycle. This leads to invalid resource
errors when the guest OS attempts to interact with the host using those
resources after resumption.

To resolve this, the virtio-gpu driver now tracks all active virtio_gpu_objects
and provides a mechanism to restore them by re-submitting the objects to QEMU
when needed (e.g., during resume from hibernation).

Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
Cc: Nirmoy Das <nirmoyd@nvidia.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patch.msgid.link/20260526192814.179673-3-dongwon.kim@intel.com
[dmitry.osipenko@collabora.com: remove extra blank line]
[dmitry.osipenko@collabora.com: move err msg to virtio_gpu_object_restore_all]

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This commit is contained in:

Dongwon Kim 2026-05-26 12:28:13 -07:00 • committed by Dmitry Osipenko

parent cad6a879a7

commit 54a9700482

5 changed files with 137 additions and 0 deletions

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15

drivers/gpu/drm/virtio/virtgpu_drv.h

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3

drivers/gpu/drm/virtio/virtgpu_kms.c

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73

drivers/gpu/drm/virtio/virtgpu_object.c

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43

drivers/gpu/drm/virtio/virtgpu_prime.c

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3

drivers/gpu/drm/virtio/virtgpu_vram.c

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