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This feature allows for each virtio-gpu 3D context to be created with a "context_init" variable. This variable can specify: - the type of protocol used by the context via the capset id. This is useful for differentiating virgl, gfxstream, and venus protocols by host userspace. - other things in the future, such as the version of the context. In addition, each different context needs one or more timelines, so for example a virgl context's waiting can be independent on a gfxstream context's waiting. VIRTIO_GPU_FLAG_INFO_RING_IDX is introduced to specific to tell the host which per-context command ring (or "hardware queue", distinct from the virtio-queue) the fence should be associated with. The new capability sets (gfxstream, venus etc.) are only defined in the virtio-gpu spec and not defined in the header. Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org> Acked-by: Lingfeng Yang <lfy@google.com> Link: http://patchwork.freedesktop.org/patch/msgid/20210921232024.817-2-gurchetansingh@chromium.org Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.