e92666b0ba
For now, "share=off,readonly=on" would always result in us opening the
file R/O and mmap'ing the opened file MAP_PRIVATE R/O -- effectively
turning it into ROM.
Especially for VM templating, "share=off" is a common use case. However,
that use case is impossible with files that lack write permissions,
because "share=off,readonly=on" will not give us writable RAM.
The sole user of ROM via memory-backend-file are R/O NVDIMMs, but as we
have users (Kata Containers) that rely on the existing behavior --
malicious VMs should not be able to consume COW memory for R/O NVDIMMs --
we cannot change the semantics of "share=off,readonly=on"
So let's add a new "rom" property with on/off/auto values. "auto" is
the default and what most people will use: for historical reasons, to not
change the old semantics, it defaults to the value of the "readonly"
property.
For VM templating, one can now use:
-object memory-backend-file,share=off,readonly=on,rom=off,...
But we'll disallow:
-object memory-backend-file,share=on,readonly=on,rom=off,...
because we would otherwise get an error when trying to mmap the R/O file
shared and writable. An explicit error message is cleaner.
We will also disallow for now:
-object memory-backend-file,share=off,readonly=off,rom=on,...
-object memory-backend-file,share=on,readonly=off,rom=on,...
It's not harmful, but also not really required for now.
Alternatives that were abandoned:
* Make "unarmed=on" for the NVDIMM set the memory region container
readonly. We would still see a change of ROM->RAM and possibly run
into memslot limits with vhost-user. Further, there might be use cases
for "unarmed=on" that should still allow writing to that memory
(temporary files, system RAM, ...).
* Add a new "readonly=on/off/auto" parameter for NVDIMMs. Similar issues
as with "unarmed=on".
* Make "readonly" consume "on/off/file" instead of being a 'bool' type.
This would slightly changes the behavior of the "readonly" parameter:
values like true/false (as accepted by a 'bool'type) would no longer be
accepted.
Message-ID: <20230906120503.359863-4-david@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
1074 lines
31 KiB
Python
1074 lines
31 KiB
Python
# -*- Mode: Python -*-
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# vim: filetype=python
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#
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# This work is licensed under the terms of the GNU GPL, version 2 or later.
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# See the COPYING file in the top-level directory.
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{ 'include': 'authz.json' }
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{ 'include': 'block-core.json' }
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{ 'include': 'common.json' }
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{ 'include': 'crypto.json' }
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|
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##
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# = QEMU Object Model (QOM)
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##
|
|
|
|
##
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# @ObjectPropertyInfo:
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#
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# @name: the name of the property
|
|
#
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# @type: the type of the property. This will typically come in one of
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# four forms:
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#
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# 1) A primitive type such as 'u8', 'u16', 'bool', 'str', or
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# 'double'. These types are mapped to the appropriate JSON
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# type.
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#
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# 2) A child type in the form 'child<subtype>' where subtype is a
|
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# qdev device type name. Child properties create the
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# composition tree.
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#
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# 3) A link type in the form 'link<subtype>' where subtype is a
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# qdev device type name. Link properties form the device model
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# graph.
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#
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# @description: if specified, the description of the property.
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|
#
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|
# @default-value: the default value, if any (since 5.0)
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|
#
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|
# Since: 1.2
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|
##
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|
{ 'struct': 'ObjectPropertyInfo',
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|
'data': { 'name': 'str',
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'type': 'str',
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'*description': 'str',
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'*default-value': 'any' } }
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|
|
|
##
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|
# @qom-list:
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|
#
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# This command will list any properties of a object given a path in
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# the object model.
|
|
#
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# @path: the path within the object model. See @qom-get for a
|
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# description of this parameter.
|
|
#
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|
# Returns: a list of @ObjectPropertyInfo that describe the properties
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# of the object.
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#
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|
# Since: 1.2
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#
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# Example:
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|
#
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# -> { "execute": "qom-list",
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# "arguments": { "path": "/chardevs" } }
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|
# <- { "return": [ { "name": "type", "type": "string" },
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# { "name": "parallel0", "type": "child<chardev-vc>" },
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# { "name": "serial0", "type": "child<chardev-vc>" },
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# { "name": "mon0", "type": "child<chardev-stdio>" } ] }
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|
##
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{ 'command': 'qom-list',
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'data': { 'path': 'str' },
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'returns': [ 'ObjectPropertyInfo' ],
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'allow-preconfig': true }
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|
|
|
##
|
|
# @qom-get:
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|
#
|
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# This command will get a property from a object model path and return
|
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# the value.
|
|
#
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|
# @path: The path within the object model. There are two forms of
|
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# supported paths--absolute and partial paths.
|
|
#
|
|
# Absolute paths are derived from the root object and can follow
|
|
# child<> or link<> properties. Since they can follow link<>
|
|
# properties, they can be arbitrarily long. Absolute paths look
|
|
# like absolute filenames and are prefixed with a leading slash.
|
|
#
|
|
# Partial paths look like relative filenames. They do not begin
|
|
# with a prefix. The matching rules for partial paths are subtle
|
|
# but designed to make specifying objects easy. At each level of
|
|
# the composition tree, the partial path is matched as an absolute
|
|
# path. The first match is not returned. At least two matches
|
|
# are searched for. A successful result is only returned if only
|
|
# one match is found. If more than one match is found, a flag is
|
|
# return to indicate that the match was ambiguous.
|
|
#
|
|
# @property: The property name to read
|
|
#
|
|
# Returns: The property value. The type depends on the property type.
|
|
# child<> and link<> properties are returned as #str pathnames.
|
|
# All integer property types (u8, u16, etc) are returned as #int.
|
|
#
|
|
# Since: 1.2
|
|
#
|
|
# Examples:
|
|
#
|
|
# 1. Use absolute path
|
|
#
|
|
# -> { "execute": "qom-get",
|
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# "arguments": { "path": "/machine/unattached/device[0]",
|
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# "property": "hotplugged" } }
|
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# <- { "return": false }
|
|
#
|
|
# 2. Use partial path
|
|
#
|
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# -> { "execute": "qom-get",
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# "arguments": { "path": "unattached/sysbus",
|
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# "property": "type" } }
|
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# <- { "return": "System" }
|
|
##
|
|
{ 'command': 'qom-get',
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'data': { 'path': 'str', 'property': 'str' },
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'returns': 'any',
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'allow-preconfig': true }
|
|
|
|
##
|
|
# @qom-set:
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|
#
|
|
# This command will set a property from a object model path.
|
|
#
|
|
# @path: see @qom-get for a description of this parameter
|
|
#
|
|
# @property: the property name to set
|
|
#
|
|
# @value: a value who's type is appropriate for the property type.
|
|
# See @qom-get for a description of type mapping.
|
|
#
|
|
# Since: 1.2
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "qom-set",
|
|
# "arguments": { "path": "/machine",
|
|
# "property": "graphics",
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|
# "value": false } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'qom-set',
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'data': { 'path': 'str', 'property': 'str', 'value': 'any' },
|
|
'allow-preconfig': true }
|
|
|
|
##
|
|
# @ObjectTypeInfo:
|
|
#
|
|
# This structure describes a search result from @qom-list-types
|
|
#
|
|
# @name: the type name found in the search
|
|
#
|
|
# @abstract: the type is abstract and can't be directly instantiated.
|
|
# Omitted if false. (since 2.10)
|
|
#
|
|
# @parent: Name of parent type, if any (since 2.10)
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|
#
|
|
# Since: 1.1
|
|
##
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|
{ 'struct': 'ObjectTypeInfo',
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|
'data': { 'name': 'str', '*abstract': 'bool', '*parent': 'str' } }
|
|
|
|
##
|
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# @qom-list-types:
|
|
#
|
|
# This command will return a list of types given search parameters
|
|
#
|
|
# @implements: if specified, only return types that implement this
|
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# type name
|
|
#
|
|
# @abstract: if true, include abstract types in the results
|
|
#
|
|
# Returns: a list of @ObjectTypeInfo or an empty list if no results
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# are found
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#
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|
# Since: 1.1
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|
##
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{ 'command': 'qom-list-types',
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|
'data': { '*implements': 'str', '*abstract': 'bool' },
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'returns': [ 'ObjectTypeInfo' ],
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|
'allow-preconfig': true }
|
|
|
|
##
|
|
# @qom-list-properties:
|
|
#
|
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# List properties associated with a QOM object.
|
|
#
|
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# @typename: the type name of an object
|
|
#
|
|
# Note: objects can create properties at runtime, for example to
|
|
# describe links between different devices and/or objects. These
|
|
# properties are not included in the output of this command.
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|
#
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# Returns: a list of ObjectPropertyInfo describing object properties
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|
#
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|
# Since: 2.12
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|
##
|
|
{ 'command': 'qom-list-properties',
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|
'data': { 'typename': 'str'},
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|
'returns': [ 'ObjectPropertyInfo' ],
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|
'allow-preconfig': true }
|
|
|
|
##
|
|
# @CanHostSocketcanProperties:
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|
#
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# Properties for can-host-socketcan objects.
|
|
#
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|
# @if: interface name of the host system CAN bus to connect to
|
|
#
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|
# @canbus: object ID of the can-bus object to connect to the host
|
|
# interface
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#
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|
# Since: 2.12
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|
##
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|
{ 'struct': 'CanHostSocketcanProperties',
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|
'data': { 'if': 'str',
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'canbus': 'str' } }
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|
|
|
##
|
|
# @ColoCompareProperties:
|
|
#
|
|
# Properties for colo-compare objects.
|
|
#
|
|
# @primary_in: name of the character device backend to use for the
|
|
# primary input (incoming packets are redirected to @outdev)
|
|
#
|
|
# @secondary_in: name of the character device backend to use for
|
|
# secondary input (incoming packets are only compared to the input
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# on @primary_in and then dropped)
|
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#
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# @outdev: name of the character device backend to use for output
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|
#
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|
# @iothread: name of the iothread to run in
|
|
#
|
|
# @notify_dev: name of the character device backend to be used to
|
|
# communicate with the remote colo-frame (only for Xen COLO)
|
|
#
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# @compare_timeout: the maximum time to hold a packet from @primary_in
|
|
# for comparison with an incoming packet on @secondary_in in
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|
# milliseconds (default: 3000)
|
|
#
|
|
# @expired_scan_cycle: the interval at which colo-compare checks
|
|
# whether packets from @primary have timed out, in milliseconds
|
|
# (default: 3000)
|
|
#
|
|
# @max_queue_size: the maximum number of packets to keep in the queue
|
|
# for comparing with incoming packets from @secondary_in. If the
|
|
# queue is full and additional packets are received, the
|
|
# additional packets are dropped. (default: 1024)
|
|
#
|
|
# @vnet_hdr_support: if true, vnet header support is enabled
|
|
# (default: false)
|
|
#
|
|
# Since: 2.8
|
|
##
|
|
{ 'struct': 'ColoCompareProperties',
|
|
'data': { 'primary_in': 'str',
|
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'secondary_in': 'str',
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'outdev': 'str',
|
|
'iothread': 'str',
|
|
'*notify_dev': 'str',
|
|
'*compare_timeout': 'uint64',
|
|
'*expired_scan_cycle': 'uint32',
|
|
'*max_queue_size': 'uint32',
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|
'*vnet_hdr_support': 'bool' } }
|
|
|
|
##
|
|
# @CryptodevBackendProperties:
|
|
#
|
|
# Properties for cryptodev-backend and cryptodev-backend-builtin
|
|
# objects.
|
|
#
|
|
# @queues: the number of queues for the cryptodev backend. Ignored
|
|
# for cryptodev-backend and must be 1 for
|
|
# cryptodev-backend-builtin. (default: 1)
|
|
#
|
|
# @throttle-bps: limit total bytes per second (Since 8.0)
|
|
#
|
|
# @throttle-ops: limit total operations per second (Since 8.0)
|
|
#
|
|
# Since: 2.8
|
|
##
|
|
{ 'struct': 'CryptodevBackendProperties',
|
|
'data': { '*queues': 'uint32',
|
|
'*throttle-bps': 'uint64',
|
|
'*throttle-ops': 'uint64' } }
|
|
|
|
##
|
|
# @CryptodevVhostUserProperties:
|
|
#
|
|
# Properties for cryptodev-vhost-user objects.
|
|
#
|
|
# @chardev: the name of a Unix domain socket character device that
|
|
# connects to the vhost-user server
|
|
#
|
|
# Since: 2.12
|
|
##
|
|
{ 'struct': 'CryptodevVhostUserProperties',
|
|
'base': 'CryptodevBackendProperties',
|
|
'data': { 'chardev': 'str' } }
|
|
|
|
##
|
|
# @DBusVMStateProperties:
|
|
#
|
|
# Properties for dbus-vmstate objects.
|
|
#
|
|
# @addr: the name of the DBus bus to connect to
|
|
#
|
|
# @id-list: a comma separated list of DBus IDs of helpers whose data
|
|
# should be included in the VM state on migration
|
|
#
|
|
# Since: 5.0
|
|
##
|
|
{ 'struct': 'DBusVMStateProperties',
|
|
'data': { 'addr': 'str' ,
|
|
'*id-list': 'str' } }
|
|
|
|
##
|
|
# @NetfilterInsert:
|
|
#
|
|
# Indicates where to insert a netfilter relative to a given other
|
|
# filter.
|
|
#
|
|
# @before: insert before the specified filter
|
|
#
|
|
# @behind: insert behind the specified filter
|
|
#
|
|
# Since: 5.0
|
|
##
|
|
{ 'enum': 'NetfilterInsert',
|
|
'data': [ 'before', 'behind' ] }
|
|
|
|
##
|
|
# @NetfilterProperties:
|
|
#
|
|
# Properties for objects of classes derived from netfilter.
|
|
#
|
|
# @netdev: id of the network device backend to filter
|
|
#
|
|
# @queue: indicates which queue(s) to filter (default: all)
|
|
#
|
|
# @status: indicates whether the filter is enabled ("on") or disabled
|
|
# ("off") (default: "on")
|
|
#
|
|
# @position: specifies where the filter should be inserted in the
|
|
# filter list. "head" means the filter is inserted at the head of
|
|
# the filter list, before any existing filters. "tail" means the
|
|
# filter is inserted at the tail of the filter list, behind any
|
|
# existing filters (default). "id=<id>" means the filter is
|
|
# inserted before or behind the filter specified by <id>,
|
|
# depending on the @insert property. (default: "tail")
|
|
#
|
|
# @insert: where to insert the filter relative to the filter given in
|
|
# @position. Ignored if @position is "head" or "tail".
|
|
# (default: behind)
|
|
#
|
|
# Since: 2.5
|
|
##
|
|
{ 'struct': 'NetfilterProperties',
|
|
'data': { 'netdev': 'str',
|
|
'*queue': 'NetFilterDirection',
|
|
'*status': 'str',
|
|
'*position': 'str',
|
|
'*insert': 'NetfilterInsert' } }
|
|
|
|
##
|
|
# @FilterBufferProperties:
|
|
#
|
|
# Properties for filter-buffer objects.
|
|
#
|
|
# @interval: a non-zero interval in microseconds. All packets
|
|
# arriving in the given interval are delayed until the end of the
|
|
# interval.
|
|
#
|
|
# Since: 2.5
|
|
##
|
|
{ 'struct': 'FilterBufferProperties',
|
|
'base': 'NetfilterProperties',
|
|
'data': { 'interval': 'uint32' } }
|
|
|
|
##
|
|
# @FilterDumpProperties:
|
|
#
|
|
# Properties for filter-dump objects.
|
|
#
|
|
# @file: the filename where the dumped packets should be stored
|
|
#
|
|
# @maxlen: maximum number of bytes in a packet that are stored
|
|
# (default: 65536)
|
|
#
|
|
# Since: 2.5
|
|
##
|
|
{ 'struct': 'FilterDumpProperties',
|
|
'base': 'NetfilterProperties',
|
|
'data': { 'file': 'str',
|
|
'*maxlen': 'uint32' } }
|
|
|
|
##
|
|
# @FilterMirrorProperties:
|
|
#
|
|
# Properties for filter-mirror objects.
|
|
#
|
|
# @outdev: the name of a character device backend to which all
|
|
# incoming packets are mirrored
|
|
#
|
|
# @vnet_hdr_support: if true, vnet header support is enabled
|
|
# (default: false)
|
|
#
|
|
# Since: 2.6
|
|
##
|
|
{ 'struct': 'FilterMirrorProperties',
|
|
'base': 'NetfilterProperties',
|
|
'data': { 'outdev': 'str',
|
|
'*vnet_hdr_support': 'bool' } }
|
|
|
|
##
|
|
# @FilterRedirectorProperties:
|
|
#
|
|
# Properties for filter-redirector objects.
|
|
#
|
|
# At least one of @indev or @outdev must be present. If both are
|
|
# present, they must not refer to the same character device backend.
|
|
#
|
|
# @indev: the name of a character device backend from which packets
|
|
# are received and redirected to the filtered network device
|
|
#
|
|
# @outdev: the name of a character device backend to which all
|
|
# incoming packets are redirected
|
|
#
|
|
# @vnet_hdr_support: if true, vnet header support is enabled
|
|
# (default: false)
|
|
#
|
|
# Since: 2.6
|
|
##
|
|
{ 'struct': 'FilterRedirectorProperties',
|
|
'base': 'NetfilterProperties',
|
|
'data': { '*indev': 'str',
|
|
'*outdev': 'str',
|
|
'*vnet_hdr_support': 'bool' } }
|
|
|
|
##
|
|
# @FilterRewriterProperties:
|
|
#
|
|
# Properties for filter-rewriter objects.
|
|
#
|
|
# @vnet_hdr_support: if true, vnet header support is enabled
|
|
# (default: false)
|
|
#
|
|
# Since: 2.8
|
|
##
|
|
{ 'struct': 'FilterRewriterProperties',
|
|
'base': 'NetfilterProperties',
|
|
'data': { '*vnet_hdr_support': 'bool' } }
|
|
|
|
##
|
|
# @InputBarrierProperties:
|
|
#
|
|
# Properties for input-barrier objects.
|
|
#
|
|
# @name: the screen name as declared in the screens section of
|
|
# barrier.conf
|
|
#
|
|
# @server: hostname of the Barrier server (default: "localhost")
|
|
#
|
|
# @port: TCP port of the Barrier server (default: "24800")
|
|
#
|
|
# @x-origin: x coordinate of the leftmost pixel on the guest screen
|
|
# (default: "0")
|
|
#
|
|
# @y-origin: y coordinate of the topmost pixel on the guest screen
|
|
# (default: "0")
|
|
#
|
|
# @width: the width of secondary screen in pixels (default: "1920")
|
|
#
|
|
# @height: the height of secondary screen in pixels (default: "1080")
|
|
#
|
|
# Since: 4.2
|
|
##
|
|
{ 'struct': 'InputBarrierProperties',
|
|
'data': { 'name': 'str',
|
|
'*server': 'str',
|
|
'*port': 'str',
|
|
'*x-origin': 'str',
|
|
'*y-origin': 'str',
|
|
'*width': 'str',
|
|
'*height': 'str' } }
|
|
|
|
##
|
|
# @InputLinuxProperties:
|
|
#
|
|
# Properties for input-linux objects.
|
|
#
|
|
# @evdev: the path of the host evdev device to use
|
|
#
|
|
# @grab_all: if true, grab is toggled for all devices (e.g. both
|
|
# keyboard and mouse) instead of just one device (default: false)
|
|
#
|
|
# @repeat: enables auto-repeat events (default: false)
|
|
#
|
|
# @grab-toggle: the key or key combination that toggles device grab
|
|
# (default: ctrl-ctrl)
|
|
#
|
|
# Since: 2.6
|
|
##
|
|
{ 'struct': 'InputLinuxProperties',
|
|
'data': { 'evdev': 'str',
|
|
'*grab_all': 'bool',
|
|
'*repeat': 'bool',
|
|
'*grab-toggle': 'GrabToggleKeys' } }
|
|
|
|
##
|
|
# @EventLoopBaseProperties:
|
|
#
|
|
# Common properties for event loops
|
|
#
|
|
# @aio-max-batch: maximum number of requests in a batch for the AIO
|
|
# engine, 0 means that the engine will use its default.
|
|
# (default: 0)
|
|
#
|
|
# @thread-pool-min: minimum number of threads reserved in the thread
|
|
# pool (default:0)
|
|
#
|
|
# @thread-pool-max: maximum number of threads the thread pool can
|
|
# contain (default:64)
|
|
#
|
|
# Since: 7.1
|
|
##
|
|
{ 'struct': 'EventLoopBaseProperties',
|
|
'data': { '*aio-max-batch': 'int',
|
|
'*thread-pool-min': 'int',
|
|
'*thread-pool-max': 'int' } }
|
|
|
|
##
|
|
# @IothreadProperties:
|
|
#
|
|
# Properties for iothread objects.
|
|
#
|
|
# @poll-max-ns: the maximum number of nanoseconds to busy wait for
|
|
# events. 0 means polling is disabled (default: 32768 on POSIX
|
|
# hosts, 0 otherwise)
|
|
#
|
|
# @poll-grow: the multiplier used to increase the polling time when
|
|
# the algorithm detects it is missing events due to not polling
|
|
# long enough. 0 selects a default behaviour (default: 0)
|
|
#
|
|
# @poll-shrink: the divisor used to decrease the polling time when the
|
|
# algorithm detects it is spending too long polling without
|
|
# encountering events. 0 selects a default behaviour (default: 0)
|
|
#
|
|
# The @aio-max-batch option is available since 6.1.
|
|
#
|
|
# Since: 2.0
|
|
##
|
|
{ 'struct': 'IothreadProperties',
|
|
'base': 'EventLoopBaseProperties',
|
|
'data': { '*poll-max-ns': 'int',
|
|
'*poll-grow': 'int',
|
|
'*poll-shrink': 'int' } }
|
|
|
|
##
|
|
# @MainLoopProperties:
|
|
#
|
|
# Properties for the main-loop object.
|
|
#
|
|
# Since: 7.1
|
|
##
|
|
{ 'struct': 'MainLoopProperties',
|
|
'base': 'EventLoopBaseProperties',
|
|
'data': {} }
|
|
|
|
##
|
|
# @MemoryBackendProperties:
|
|
#
|
|
# Properties for objects of classes derived from memory-backend.
|
|
#
|
|
# @merge: if true, mark the memory as mergeable (default depends on
|
|
# the machine type)
|
|
#
|
|
# @dump: if true, include the memory in core dumps (default depends on
|
|
# the machine type)
|
|
#
|
|
# @host-nodes: the list of NUMA host nodes to bind the memory to
|
|
#
|
|
# @policy: the NUMA policy (default: 'default')
|
|
#
|
|
# @prealloc: if true, preallocate memory (default: false)
|
|
#
|
|
# @prealloc-threads: number of CPU threads to use for prealloc
|
|
# (default: 1)
|
|
#
|
|
# @prealloc-context: thread context to use for creation of
|
|
# preallocation threads (default: none) (since 7.2)
|
|
#
|
|
# @share: if false, the memory is private to QEMU; if true, it is
|
|
# shared (default: false)
|
|
#
|
|
# @reserve: if true, reserve swap space (or huge pages) if applicable
|
|
# (default: true) (since 6.1)
|
|
#
|
|
# @size: size of the memory region in bytes
|
|
#
|
|
# @x-use-canonical-path-for-ramblock-id: if true, the canonical path
|
|
# is used for ramblock-id. Disable this for 4.0 machine types or
|
|
# older to allow migration with newer QEMU versions.
|
|
# (default: false generally, but true for machine types <= 4.0)
|
|
#
|
|
# Note: prealloc=true and reserve=false cannot be set at the same
|
|
# time. With reserve=true, the behavior depends on the operating
|
|
# system: for example, Linux will not reserve swap space for
|
|
# shared file mappings -- "not applicable". In contrast,
|
|
# reserve=false will bail out if it cannot be configured
|
|
# accordingly.
|
|
#
|
|
# Since: 2.1
|
|
##
|
|
{ 'struct': 'MemoryBackendProperties',
|
|
'data': { '*dump': 'bool',
|
|
'*host-nodes': ['uint16'],
|
|
'*merge': 'bool',
|
|
'*policy': 'HostMemPolicy',
|
|
'*prealloc': 'bool',
|
|
'*prealloc-threads': 'uint32',
|
|
'*prealloc-context': 'str',
|
|
'*share': 'bool',
|
|
'*reserve': 'bool',
|
|
'size': 'size',
|
|
'*x-use-canonical-path-for-ramblock-id': 'bool' } }
|
|
|
|
##
|
|
# @MemoryBackendFileProperties:
|
|
#
|
|
# Properties for memory-backend-file objects.
|
|
#
|
|
# @align: the base address alignment when QEMU mmap(2)s @mem-path.
|
|
# Some backend stores specified by @mem-path require an alignment
|
|
# different than the default one used by QEMU, e.g. the device DAX
|
|
# /dev/dax0.0 requires 2M alignment rather than 4K. In such cases,
|
|
# users can specify the required alignment via this option. 0
|
|
# selects a default alignment (currently the page size).
|
|
# (default: 0)
|
|
#
|
|
# @offset: the offset into the target file that the region starts at.
|
|
# You can use this option to back multiple regions with a single
|
|
# file. Must be a multiple of the page size.
|
|
# (default: 0) (since 8.1)
|
|
#
|
|
# @discard-data: if true, the file contents can be destroyed when QEMU
|
|
# exits, to avoid unnecessarily flushing data to the backing file.
|
|
# Note that @discard-data is only an optimization, and QEMU might
|
|
# not discard file contents if it aborts unexpectedly or is
|
|
# terminated using SIGKILL. (default: false)
|
|
#
|
|
# @mem-path: the path to either a shared memory or huge page
|
|
# filesystem mount
|
|
#
|
|
# @pmem: specifies whether the backing file specified by @mem-path is
|
|
# in host persistent memory that can be accessed using the SNIA
|
|
# NVM programming model (e.g. Intel NVDIMM).
|
|
#
|
|
# @readonly: if true, the backing file is opened read-only; if false,
|
|
# it is opened read-write. (default: false)
|
|
#
|
|
# @rom: whether to create Read Only Memory (ROM) that cannot be modified
|
|
# by the VM. Any write attempts to such ROM will be denied. Most
|
|
# use cases want writable RAM instead of ROM. However, selected use
|
|
# cases, like R/O NVDIMMs, can benefit from ROM. If set to 'on',
|
|
# create ROM; if set to 'off', create writable RAM; if set to
|
|
# 'auto', the value of the @readonly property is used. This
|
|
# property is primarily helpful when we want to have proper RAM in
|
|
# configurations that would traditionally create ROM before this
|
|
# property was introduced: VM templating, where we want to open a
|
|
# file readonly (@readonly set to true) and mark the memory to be
|
|
# private for QEMU (@share set to false). For this use case, we need
|
|
# writable RAM instead of ROM, and want to set this property to 'off'.
|
|
# (default: auto, since 8.2)
|
|
#
|
|
# Since: 2.1
|
|
##
|
|
{ 'struct': 'MemoryBackendFileProperties',
|
|
'base': 'MemoryBackendProperties',
|
|
'data': { '*align': 'size',
|
|
'*offset': 'size',
|
|
'*discard-data': 'bool',
|
|
'mem-path': 'str',
|
|
'*pmem': { 'type': 'bool', 'if': 'CONFIG_LIBPMEM' },
|
|
'*readonly': 'bool',
|
|
'*rom': 'OnOffAuto' } }
|
|
|
|
##
|
|
# @MemoryBackendMemfdProperties:
|
|
#
|
|
# Properties for memory-backend-memfd objects.
|
|
#
|
|
# The @share boolean option is true by default with memfd.
|
|
#
|
|
# @hugetlb: if true, the file to be created resides in the hugetlbfs
|
|
# filesystem (default: false)
|
|
#
|
|
# @hugetlbsize: the hugetlb page size on systems that support multiple
|
|
# hugetlb page sizes (it must be a power of 2 value supported by
|
|
# the system). 0 selects a default page size. This option is
|
|
# ignored if @hugetlb is false. (default: 0)
|
|
#
|
|
# @seal: if true, create a sealed-file, which will block further
|
|
# resizing of the memory (default: true)
|
|
#
|
|
# Since: 2.12
|
|
##
|
|
{ 'struct': 'MemoryBackendMemfdProperties',
|
|
'base': 'MemoryBackendProperties',
|
|
'data': { '*hugetlb': 'bool',
|
|
'*hugetlbsize': 'size',
|
|
'*seal': 'bool' } }
|
|
|
|
##
|
|
# @MemoryBackendEpcProperties:
|
|
#
|
|
# Properties for memory-backend-epc objects.
|
|
#
|
|
# The @share boolean option is true by default with epc
|
|
#
|
|
# The @merge boolean option is false by default with epc
|
|
#
|
|
# The @dump boolean option is false by default with epc
|
|
#
|
|
# Since: 6.2
|
|
##
|
|
{ 'struct': 'MemoryBackendEpcProperties',
|
|
'base': 'MemoryBackendProperties',
|
|
'data': {} }
|
|
|
|
##
|
|
# @PrManagerHelperProperties:
|
|
#
|
|
# Properties for pr-manager-helper objects.
|
|
#
|
|
# @path: the path to a Unix domain socket for connecting to the
|
|
# external helper
|
|
#
|
|
# Since: 2.11
|
|
##
|
|
{ 'struct': 'PrManagerHelperProperties',
|
|
'data': { 'path': 'str' } }
|
|
|
|
##
|
|
# @QtestProperties:
|
|
#
|
|
# Properties for qtest objects.
|
|
#
|
|
# @chardev: the chardev to be used to receive qtest commands on.
|
|
#
|
|
# @log: the path to a log file
|
|
#
|
|
# Since: 6.0
|
|
##
|
|
{ 'struct': 'QtestProperties',
|
|
'data': { 'chardev': 'str',
|
|
'*log': 'str' } }
|
|
|
|
##
|
|
# @RemoteObjectProperties:
|
|
#
|
|
# Properties for x-remote-object objects.
|
|
#
|
|
# @fd: file descriptor name previously passed via 'getfd' command
|
|
#
|
|
# @devid: the id of the device to be associated with the file
|
|
# descriptor
|
|
#
|
|
# Since: 6.0
|
|
##
|
|
{ 'struct': 'RemoteObjectProperties',
|
|
'data': { 'fd': 'str', 'devid': 'str' } }
|
|
|
|
##
|
|
# @VfioUserServerProperties:
|
|
#
|
|
# Properties for x-vfio-user-server objects.
|
|
#
|
|
# @socket: socket to be used by the libvfio-user library
|
|
#
|
|
# @device: the ID of the device to be emulated at the server
|
|
#
|
|
# Since: 7.1
|
|
##
|
|
{ 'struct': 'VfioUserServerProperties',
|
|
'data': { 'socket': 'SocketAddress', 'device': 'str' } }
|
|
|
|
##
|
|
# @RngProperties:
|
|
#
|
|
# Properties for objects of classes derived from rng.
|
|
#
|
|
# @opened: if true, the device is opened immediately when applying
|
|
# this option and will probably fail when processing the next
|
|
# option. Don't use; only provided for compatibility.
|
|
# (default: false)
|
|
#
|
|
# Features:
|
|
#
|
|
# @deprecated: Member @opened is deprecated. Setting true doesn't
|
|
# make sense, and false is already the default.
|
|
#
|
|
# Since: 1.3
|
|
##
|
|
{ 'struct': 'RngProperties',
|
|
'data': { '*opened': { 'type': 'bool', 'features': ['deprecated'] } } }
|
|
|
|
##
|
|
# @RngEgdProperties:
|
|
#
|
|
# Properties for rng-egd objects.
|
|
#
|
|
# @chardev: the name of a character device backend that provides the
|
|
# connection to the RNG daemon
|
|
#
|
|
# Since: 1.3
|
|
##
|
|
{ 'struct': 'RngEgdProperties',
|
|
'base': 'RngProperties',
|
|
'data': { 'chardev': 'str' } }
|
|
|
|
##
|
|
# @RngRandomProperties:
|
|
#
|
|
# Properties for rng-random objects.
|
|
#
|
|
# @filename: the filename of the device on the host to obtain entropy
|
|
# from (default: "/dev/urandom")
|
|
#
|
|
# Since: 1.3
|
|
##
|
|
{ 'struct': 'RngRandomProperties',
|
|
'base': 'RngProperties',
|
|
'data': { '*filename': 'str' } }
|
|
|
|
##
|
|
# @SevGuestProperties:
|
|
#
|
|
# Properties for sev-guest objects.
|
|
#
|
|
# @sev-device: SEV device to use (default: "/dev/sev")
|
|
#
|
|
# @dh-cert-file: guest owners DH certificate (encoded with base64)
|
|
#
|
|
# @session-file: guest owners session parameters (encoded with base64)
|
|
#
|
|
# @policy: SEV policy value (default: 0x1)
|
|
#
|
|
# @handle: SEV firmware handle (default: 0)
|
|
#
|
|
# @cbitpos: C-bit location in page table entry (default: 0)
|
|
#
|
|
# @reduced-phys-bits: number of bits in physical addresses that become
|
|
# unavailable when SEV is enabled
|
|
#
|
|
# @kernel-hashes: if true, add hashes of kernel/initrd/cmdline to a
|
|
# designated guest firmware page for measured boot with -kernel
|
|
# (default: false) (since 6.2)
|
|
#
|
|
# Since: 2.12
|
|
##
|
|
{ 'struct': 'SevGuestProperties',
|
|
'data': { '*sev-device': 'str',
|
|
'*dh-cert-file': 'str',
|
|
'*session-file': 'str',
|
|
'*policy': 'uint32',
|
|
'*handle': 'uint32',
|
|
'*cbitpos': 'uint32',
|
|
'reduced-phys-bits': 'uint32',
|
|
'*kernel-hashes': 'bool' } }
|
|
|
|
##
|
|
# @ThreadContextProperties:
|
|
#
|
|
# Properties for thread context objects.
|
|
#
|
|
# @cpu-affinity: the list of host CPU numbers used as CPU affinity for
|
|
# all threads created in the thread context (default: QEMU main
|
|
# thread CPU affinity)
|
|
#
|
|
# @node-affinity: the list of host node numbers that will be resolved
|
|
# to a list of host CPU numbers used as CPU affinity. This is a
|
|
# shortcut for specifying the list of host CPU numbers belonging
|
|
# to the host nodes manually by setting @cpu-affinity.
|
|
# (default: QEMU main thread affinity)
|
|
#
|
|
# Since: 7.2
|
|
##
|
|
{ 'struct': 'ThreadContextProperties',
|
|
'data': { '*cpu-affinity': ['uint16'],
|
|
'*node-affinity': ['uint16'] } }
|
|
|
|
|
|
##
|
|
# @ObjectType:
|
|
#
|
|
# Features:
|
|
#
|
|
# @unstable: Member @x-remote-object is experimental.
|
|
#
|
|
# Since: 6.0
|
|
##
|
|
{ 'enum': 'ObjectType',
|
|
'data': [
|
|
'authz-list',
|
|
'authz-listfile',
|
|
'authz-pam',
|
|
'authz-simple',
|
|
'can-bus',
|
|
{ 'name': 'can-host-socketcan',
|
|
'if': 'CONFIG_LINUX' },
|
|
'colo-compare',
|
|
'cryptodev-backend',
|
|
'cryptodev-backend-builtin',
|
|
'cryptodev-backend-lkcf',
|
|
{ 'name': 'cryptodev-vhost-user',
|
|
'if': 'CONFIG_VHOST_CRYPTO' },
|
|
'dbus-vmstate',
|
|
'filter-buffer',
|
|
'filter-dump',
|
|
'filter-mirror',
|
|
'filter-redirector',
|
|
'filter-replay',
|
|
'filter-rewriter',
|
|
'input-barrier',
|
|
{ 'name': 'input-linux',
|
|
'if': 'CONFIG_LINUX' },
|
|
'iothread',
|
|
'main-loop',
|
|
{ 'name': 'memory-backend-epc',
|
|
'if': 'CONFIG_LINUX' },
|
|
'memory-backend-file',
|
|
{ 'name': 'memory-backend-memfd',
|
|
'if': 'CONFIG_LINUX' },
|
|
'memory-backend-ram',
|
|
'pef-guest',
|
|
{ 'name': 'pr-manager-helper',
|
|
'if': 'CONFIG_LINUX' },
|
|
'qtest',
|
|
'rng-builtin',
|
|
'rng-egd',
|
|
{ 'name': 'rng-random',
|
|
'if': 'CONFIG_POSIX' },
|
|
'secret',
|
|
{ 'name': 'secret_keyring',
|
|
'if': 'CONFIG_SECRET_KEYRING' },
|
|
'sev-guest',
|
|
'thread-context',
|
|
's390-pv-guest',
|
|
'throttle-group',
|
|
'tls-creds-anon',
|
|
'tls-creds-psk',
|
|
'tls-creds-x509',
|
|
'tls-cipher-suites',
|
|
{ 'name': 'x-remote-object', 'features': [ 'unstable' ] },
|
|
{ 'name': 'x-vfio-user-server', 'features': [ 'unstable' ] }
|
|
] }
|
|
|
|
##
|
|
# @ObjectOptions:
|
|
#
|
|
# Describes the options of a user creatable QOM object.
|
|
#
|
|
# @qom-type: the class name for the object to be created
|
|
#
|
|
# @id: the name of the new object
|
|
#
|
|
# Since: 6.0
|
|
##
|
|
{ 'union': 'ObjectOptions',
|
|
'base': { 'qom-type': 'ObjectType',
|
|
'id': 'str' },
|
|
'discriminator': 'qom-type',
|
|
'data': {
|
|
'authz-list': 'AuthZListProperties',
|
|
'authz-listfile': 'AuthZListFileProperties',
|
|
'authz-pam': 'AuthZPAMProperties',
|
|
'authz-simple': 'AuthZSimpleProperties',
|
|
'can-host-socketcan': { 'type': 'CanHostSocketcanProperties',
|
|
'if': 'CONFIG_LINUX' },
|
|
'colo-compare': 'ColoCompareProperties',
|
|
'cryptodev-backend': 'CryptodevBackendProperties',
|
|
'cryptodev-backend-builtin': 'CryptodevBackendProperties',
|
|
'cryptodev-backend-lkcf': 'CryptodevBackendProperties',
|
|
'cryptodev-vhost-user': { 'type': 'CryptodevVhostUserProperties',
|
|
'if': 'CONFIG_VHOST_CRYPTO' },
|
|
'dbus-vmstate': 'DBusVMStateProperties',
|
|
'filter-buffer': 'FilterBufferProperties',
|
|
'filter-dump': 'FilterDumpProperties',
|
|
'filter-mirror': 'FilterMirrorProperties',
|
|
'filter-redirector': 'FilterRedirectorProperties',
|
|
'filter-replay': 'NetfilterProperties',
|
|
'filter-rewriter': 'FilterRewriterProperties',
|
|
'input-barrier': 'InputBarrierProperties',
|
|
'input-linux': { 'type': 'InputLinuxProperties',
|
|
'if': 'CONFIG_LINUX' },
|
|
'iothread': 'IothreadProperties',
|
|
'main-loop': 'MainLoopProperties',
|
|
'memory-backend-epc': { 'type': 'MemoryBackendEpcProperties',
|
|
'if': 'CONFIG_LINUX' },
|
|
'memory-backend-file': 'MemoryBackendFileProperties',
|
|
'memory-backend-memfd': { 'type': 'MemoryBackendMemfdProperties',
|
|
'if': 'CONFIG_LINUX' },
|
|
'memory-backend-ram': 'MemoryBackendProperties',
|
|
'pr-manager-helper': { 'type': 'PrManagerHelperProperties',
|
|
'if': 'CONFIG_LINUX' },
|
|
'qtest': 'QtestProperties',
|
|
'rng-builtin': 'RngProperties',
|
|
'rng-egd': 'RngEgdProperties',
|
|
'rng-random': { 'type': 'RngRandomProperties',
|
|
'if': 'CONFIG_POSIX' },
|
|
'secret': 'SecretProperties',
|
|
'secret_keyring': { 'type': 'SecretKeyringProperties',
|
|
'if': 'CONFIG_SECRET_KEYRING' },
|
|
'sev-guest': 'SevGuestProperties',
|
|
'thread-context': 'ThreadContextProperties',
|
|
'throttle-group': 'ThrottleGroupProperties',
|
|
'tls-creds-anon': 'TlsCredsAnonProperties',
|
|
'tls-creds-psk': 'TlsCredsPskProperties',
|
|
'tls-creds-x509': 'TlsCredsX509Properties',
|
|
'tls-cipher-suites': 'TlsCredsProperties',
|
|
'x-remote-object': 'RemoteObjectProperties',
|
|
'x-vfio-user-server': 'VfioUserServerProperties'
|
|
} }
|
|
|
|
##
|
|
# @object-add:
|
|
#
|
|
# Create a QOM object.
|
|
#
|
|
# Returns: Nothing on success Error if @qom-type is not a valid class
|
|
# name
|
|
#
|
|
# Since: 2.0
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "object-add",
|
|
# "arguments": { "qom-type": "rng-random", "id": "rng1",
|
|
# "filename": "/dev/hwrng" } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'object-add', 'data': 'ObjectOptions', 'boxed': true,
|
|
'allow-preconfig': true }
|
|
|
|
##
|
|
# @object-del:
|
|
#
|
|
# Remove a QOM object.
|
|
#
|
|
# @id: the name of the QOM object to remove
|
|
#
|
|
# Returns: Nothing on success Error if @id is not a valid id for a QOM
|
|
# object
|
|
#
|
|
# Since: 2.0
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "object-del", "arguments": { "id": "rng1" } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'object-del', 'data': {'id': 'str'},
|
|
'allow-preconfig': true }
|