devices: virtio: Initial implementation of virtio-video device

This CL adds a fundamental part of the virtio video device, which will
be shared between the encoder and the decoder.
Both devices uses the virtio-video protocol proposed as RFC v3 [1,2].
The corresponding driver code is at CL:2060327 and its children CLs.

The actual decoding and encoding logic will be implemented in different
CLs.

[1]: mail: https://markmail.org/thread/wxdne5re7aaugbjg
[2]: PDF: https://drive.google.com/file/d/1jOsS2WdVhL4PpcWLO8Zukq5J0fXDiWn-/view

BUG=b:147465619, b:140082257
TEST=cargo check --features=video-decoder,video-encoder
TEST=ARCVM started with --video-decoder --video-encoder

Cq-Depend: chromium:2203997
Change-Id: I01999eea218ba0f3aaed1558ca2311a57d0c6819
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1973973
Reviewed-by: Keiichi Watanabe <keiichiw@chromium.org>
Tested-by: Keiichi Watanabe <keiichiw@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Keiichi Watanabe <keiichiw@chromium.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/seccomp/x86_64/video_device.policy b/seccomp/x86_64/video_device.policy
new file mode 100644
index 0000000..fdc5935
--- /dev/null
+++ b/seccomp/x86_64/video_device.policy
@@ -0,0 +1,24 @@
+# Copyright 2020 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+@include /usr/share/policy/crosvm/common_device.policy
+
+# Syscalls specific to video devices.
+clock_getres: 1
+connect: 1
+fcntl: arg1 == F_GETFL || arg1 == F_SETFL || arg1 == F_DUPFD_CLOEXEC || arg1 == F_GETFD || arg1 == F_SETFD
+getdents: 1
+getegid: 1
+geteuid: 1
+getgid: 1
+getresgid: 1
+getresuid: 1
+getsockname: 1
+getuid: 1
+# ioctl: arg1 == DRM_IOCTL_*
+ioctl: arg1 & 0x6400
+openat: 1
+setpriority: 1
+socket: arg0 == AF_UNIX
+stat: 1