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drm/virtio: Add drm_panic support

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Virtio gpu supports the drm_panic module, which displays a message to
the screen when a kernel panic occurs. It is supported where it has
vmapped shmem BO.

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Signed-off-by: Ryosuke Yasuoka <ryasuoka@redhat.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250206104300.416014-1-ryasuoka@redhat.com
This commit is contained in:
Ryosuke Yasuoka
2025-02-06 19:42:59 +09:00
committed by Dmitry Osipenko
parent 05345cea4f
commit 6f3d9d0dd3
4 changed files with 272 additions and 0 deletions
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14
drivers/gpu/drm/virtio/virtgpu_gem.c
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@@ -148,6 +148,20 @@ void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
virtio_gpu_notify(vgdev);
}
/* For drm panic */
struct virtio_gpu_object_array *virtio_gpu_panic_array_alloc(void)
{
struct virtio_gpu_object_array *objs;
objs = kmalloc(sizeof(struct virtio_gpu_object_array), GFP_ATOMIC);
if (!objs)
return NULL;
objs->nents = 0;
objs->total = 1;
return objs;
}
struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
{
struct virtio_gpu_object_array *objs;