Messages in this thread Patch in this message | | | From | Rob Clark <> | Subject | [PATCH] drm/virtio: Remove restriction of non-zero blob_flags | Date | Sat, 19 Feb 2022 09:03:01 -0800 |
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From: Rob Clark <robdclark@chromium.org>
With native userspace drivers in guest, a lot of GEM objects need to be neither shared nor mappable. And in fact making everything mappable and/or sharable results in unreasonably high fd usage in host VMM.
Signed-off-by: Rob Clark <robdclark@chromium.org> --- This is for a thing I'm working on, a new virtgpu context type that allows for running native userspace driver in the guest, with a thin shim in the host VMM. In this case, the guest has a lot of GEM buffer objects which need to be neither shared nor mappable.
This supersedes https://patchwork.freedesktop.org/patch/475127/
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index 69f1952f3144..3a8078f2ee27 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -617,8 +617,7 @@ static int verify_blob(struct virtio_gpu_device *vgdev, if (!vgdev->has_resource_blob) return -EINVAL; - if ((rc_blob->blob_flags & ~VIRTGPU_BLOB_FLAG_USE_MASK) || - !rc_blob->blob_flags) + if (rc_blob->blob_flags & ~VIRTGPU_BLOB_FLAG_USE_MASK) return -EINVAL; if (rc_blob->blob_flags & VIRTGPU_BLOB_FLAG_USE_CROSS_DEVICE) { -- 2.34.1
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