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vhost-user: add vhost_user_gpu_set_socket()

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Add a new vhost-user message to give a unix socket to a vhost-user
backend for GPU display updates.

Back when I started that work, I added a new GPU channel because the
vhost-user protocol wasn't bidirectional. Since then, there is a
vhost-user-slave channel for the slave to send requests to the master.
We could extend it with GPU messages. However, the GPU protocol is
quite orthogonal to vhost-user, thus I chose to have a new dedicated
channel.

See vhost-user-gpu.rst for the protocol details.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20190524130946.31736-2-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Marc-André Lureau 2019-05-24 15:09:38 +02:00 • committed by Gerd Hoffmann
parent da35f7f1ee
commit bd2e44fee4
8 changed files with 273 additions and 0 deletions
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1
contrib/libvhost-user/libvhost-user.c
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@ -130,6 +130,7 @@ vu_request_to_string(unsigned int req)
REQ(VHOST_USER_POSTCOPY_END),
REQ(VHOST_USER_GET_INFLIGHT_FD),
REQ(VHOST_USER_SET_INFLIGHT_FD),
REQ(VHOST_USER_GPU_SET_SOCKET),
REQ(VHOST_USER_MAX),
};
#undef REQ