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virtio-gpu: fix scanout migration post-load

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The current post-loading code for scanout has a FIXME: it doesn't take
the resource region/rect into account. But there is more, when adding
blob migration support in commit f66767f75c, I didn't realize that blob
resources could be used for scanouts. This situationn leads to a crash
during post-load, as they don't have an associated res->image.

virtio_gpu_do_set_scanout() handle all cases, but requires the
associated virtio_gpu_framebuffer, which is currently not saved during
migration.

Add a v2 of "virtio-gpu-one-scanout" with the framebuffer fields, so we
can restore blob scanouts, as well as fixing the existing FIXME.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Sebastian Ott <sebott@redhat.com>
This commit is contained in:
Marc-André Lureau 2024-01-15 16:34:33 +04:00
parent cab47b2105
commit dfcf74fa68
2 changed files with 44 additions and 12 deletions
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include/hw/virtio/virtio-gpu.h
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@ -81,6 +81,7 @@ struct virtio_gpu_scanout {
uint32_t resource_id;
struct virtio_gpu_update_cursor cursor;
QEMUCursor *current_cursor;
struct virtio_gpu_framebuffer fb;
};
struct virtio_gpu_requested_state {