qemu/docs/interop/vhost-user.json
Akihiko Odaki bc6a3565c8 configure: Improve OpenGL dependency detections
This has the following visible changes:

- GBM is required only for OpenGL dma-buf.
- X11 is explicitly required by gtk-egl.
- EGL is now mandatory for the OpenGL displays.

The last one needs some detailed description. Before this change,
EGL was tested only for OpenGL dma-buf with the check of
EGL_MESA_image_dma_buf_export. However, all of the OpenGL
displays depend on EGL and EGL_MESA_image_dma_buf_export is always
defined by epoxy's EGL interface.
Therefore, it makes more sense to always check the presence of EGL
and say the OpenGL displays are available along with OpenGL dma-buf
if it is present.

Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Message-Id: <20210223060307.87736-1-akihiko.odaki@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2021-03-04 09:35:30 +01:00

268 lines
6.3 KiB
Python

# -*- Mode: Python -*-
# vim: filetype=python
#
# Copyright (C) 2018 Red Hat, Inc.
#
# Authors:
# Marc-André Lureau <marcandre.lureau@redhat.com>
#
# This work is licensed under the terms of the GNU GPL, version 2 or
# later. See the COPYING file in the top-level directory.
##
# = vhost user backend discovery & capabilities
##
##
# @VHostUserBackendType:
#
# List the various vhost user backend types.
#
# @9p: 9p virtio console
# @balloon: virtio balloon
# @block: virtio block
# @caif: virtio caif
# @console: virtio console
# @crypto: virtio crypto
# @gpu: virtio gpu
# @input: virtio input
# @net: virtio net
# @rng: virtio rng
# @rpmsg: virtio remote processor messaging
# @rproc-serial: virtio remoteproc serial link
# @scsi: virtio scsi
# @vsock: virtio vsock transport
# @fs: virtio fs (since 4.2)
#
# Since: 4.0
##
{
'enum': 'VHostUserBackendType',
'data': [
'9p',
'balloon',
'block',
'caif',
'console',
'crypto',
'gpu',
'input',
'net',
'rng',
'rpmsg',
'rproc-serial',
'scsi',
'vsock',
'fs'
]
}
##
# @VHostUserBackendBlockFeature:
#
# List of vhost user "block" features.
#
# @read-only: The --read-only command line option is supported.
# @blk-file: The --blk-file command line option is supported.
#
# Since: 5.0
##
{
'enum': 'VHostUserBackendBlockFeature',
'data': [ 'read-only', 'blk-file' ]
}
##
# @VHostUserBackendCapabilitiesBlock:
#
# Capabilities reported by vhost user "block" backends
#
# @features: list of supported features.
#
# Since: 5.0
##
{
'struct': 'VHostUserBackendCapabilitiesBlock',
'data': {
'features': [ 'VHostUserBackendBlockFeature' ]
}
}
##
# @VHostUserBackendInputFeature:
#
# List of vhost user "input" features.
#
# @evdev-path: The --evdev-path command line option is supported.
# @no-grab: The --no-grab command line option is supported.
#
# Since: 4.0
##
{
'enum': 'VHostUserBackendInputFeature',
'data': [ 'evdev-path', 'no-grab' ]
}
##
# @VHostUserBackendCapabilitiesInput:
#
# Capabilities reported by vhost user "input" backends
#
# @features: list of supported features.
#
# Since: 4.0
##
{
'struct': 'VHostUserBackendCapabilitiesInput',
'data': {
'features': [ 'VHostUserBackendInputFeature' ]
}
}
##
# @VHostUserBackendGPUFeature:
#
# List of vhost user "gpu" features.
#
# @render-node: The --render-node command line option is supported.
# @virgl: The --virgl command line option is supported.
#
# Since: 4.0
##
{
'enum': 'VHostUserBackendGPUFeature',
'data': [ 'render-node', 'virgl' ]
}
##
# @VHostUserBackendCapabilitiesGPU:
#
# Capabilities reported by vhost user "gpu" backends.
#
# @features: list of supported features.
#
# Since: 4.0
##
{
'struct': 'VHostUserBackendCapabilitiesGPU',
'data': {
'features': [ 'VHostUserBackendGPUFeature' ]
}
}
##
# @VHostUserBackendCapabilities:
#
# Capabilities reported by vhost user backends.
#
# @type: The vhost user backend type.
#
# Since: 4.0
##
{
'union': 'VHostUserBackendCapabilities',
'base': { 'type': 'VHostUserBackendType' },
'discriminator': 'type',
'data': {
'input': 'VHostUserBackendCapabilitiesInput',
'gpu': 'VHostUserBackendCapabilitiesGPU'
}
}
##
# @VhostUserBackend:
#
# Describes a vhost user backend to management software.
#
# It is possible for multiple @VhostUserBackend elements to match the
# search criteria of management software. Applications thus need rules
# to pick one of the many matches, and users need the ability to
# override distro defaults.
#
# It is recommended to create vhost user backend JSON files (each
# containing a single @VhostUserBackend root element) with a
# double-digit prefix, for example "50-qemu-gpu.json",
# "50-crosvm-gpu.json", etc, so they can be sorted in predictable
# order. The backend JSON files should be searched for in three
# directories:
#
# - /usr/share/qemu/vhost-user -- populated by distro-provided
# packages (XDG_DATA_DIRS covers
# /usr/share by default),
#
# - /etc/qemu/vhost-user -- exclusively for sysadmins' local additions,
#
# - $XDG_CONFIG_HOME/qemu/vhost-user -- exclusively for per-user local
# additions (XDG_CONFIG_HOME
# defaults to $HOME/.config).
#
# Top-down, the list of directories goes from general to specific.
#
# Management software should build a list of files from all three
# locations, then sort the list by filename (i.e., basename
# component). Management software should choose the first JSON file on
# the sorted list that matches the search criteria. If a more specific
# directory has a file with same name as a less specific directory,
# then the file in the more specific directory takes effect. If the
# more specific file is zero length, it hides the less specific one.
#
# For example, if a distro ships
#
# - /usr/share/qemu/vhost-user/50-qemu-gpu.json
#
# - /usr/share/qemu/vhost-user/50-crosvm-gpu.json
#
# then the sysadmin can prevent the default QEMU GPU being used at all with
#
# $ touch /etc/qemu/vhost-user/50-qemu-gpu.json
#
# The sysadmin can replace/alter the distro default QEMU GPU with
#
# $ vim /etc/qemu/vhost-user/50-qemu-gpu.json
#
# or they can provide a parallel QEMU GPU with higher priority
#
# $ vim /etc/qemu/vhost-user/10-qemu-gpu.json
#
# or they can provide a parallel QEMU GPU with lower priority
#
# $ vim /etc/qemu/vhost-user/99-qemu-gpu.json
#
# @type: The vhost user backend type.
#
# @description: Provides a human-readable description of the backend.
# Management software may or may not display @description.
#
# @binary: Absolute path to the backend binary.
#
# @tags: An optional list of auxiliary strings associated with the
# backend for which @description is not appropriate, due to the
# latter's possible exposure to the end-user. @tags serves
# development and debugging purposes only, and management
# software shall explicitly ignore it.
#
# Since: 4.0
#
# Example:
#
# {
# "description": "QEMU vhost-user-gpu",
# "type": "gpu",
# "binary": "/usr/libexec/qemu/vhost-user-gpu",
# "tags": [
# "CONFIG_OPENGL=y",
# "CONFIG_GBM=y"
# ]
# }
#
##
{
'struct' : 'VhostUserBackend',
'data' : {
'description': 'str',
'type': 'VHostUserBackendType',
'binary': 'str',
'*tags': [ 'str' ]
}
}