hmp-commands-info.hx | 70 +++ hw/9pfs/virtio-9p-device.c | 2 +- hw/block/vhost-user-blk.c | 9 +- hw/block/virtio-blk.c | 31 +- hw/char/virtio-serial-bus.c | 14 +- hw/display/vhost-user-gpu.c | 7 + hw/display/virtio-gpu-base.c | 20 +- hw/input/vhost-user-input.c | 7 + hw/input/virtio-input.c | 13 +- hw/net/virtio-net.c | 58 ++- hw/scsi/vhost-scsi.c | 8 + hw/scsi/virtio-scsi.c | 20 +- hw/virtio/meson.build | 2 + hw/virtio/vhost-user-fs.c | 20 +- hw/virtio/vhost-user-i2c.c | 7 +- hw/virtio/vhost-user-rng.c | 9 +- hw/virtio/vhost-user-vsock.c | 2 +- hw/virtio/vhost-vsock-common.c | 22 +- hw/virtio/vhost-vsock.c | 2 +- hw/virtio/vhost.c | 4 +- hw/virtio/virtio-balloon.c | 17 +- hw/virtio/virtio-crypto.c | 22 +- hw/virtio/virtio-iommu.c | 17 +- hw/virtio/virtio-mem.c | 14 +- hw/virtio/virtio-pmem.c | 3 +- hw/virtio/virtio-rng.c | 2 +- hw/virtio/virtio-stub.c | 42 ++ hw/virtio/virtio.c | 742 ++++++++++++++++++++++++++++- include/hw/virtio/vhost-vsock-common.h | 2 +- include/hw/virtio/vhost.h | 3 + include/hw/virtio/virtio-gpu.h | 3 +- include/hw/virtio/virtio.h | 26 +- include/monitor/hmp.h | 5 + monitor/hmp-cmds.c | 311 ++++++++++++ qapi/meson.build | 1 + qapi/qapi-schema.json | 1 + qapi/virtio.json | 841 +++++++++++++++++++++++++++++++++ tests/qtest/qmp-cmd-test.c | 1 + 38 files changed, 2335 insertions(+), 45 deletions(-) create mode 100644 hw/virtio/virtio-stub.c create mode 100644 qapi/virtio.json
This series introduces new QMP/HMP commands to dump the status of a
virtio device at different levels.
[Jonah: Rebasing from previous patchset from Dec. 9 (v10). Original patches
are by Laurnet Vivier from May 2020.
Rebase from v10 to v11 mainly includes a check when querying or gathering
any information about a virtio device. This check queries the QOM composition
tree to make sure that the device (a) exists and (b) is realized before
attempting to get any more information from it. This is done to get some
kind of synchronicity between @virtio_list and the QOM composition tree.]
1. List available virtio devices in the machine
HMP Form:
info virtio
Example:
(qemu) info virtio
/machine/peripheral/vsock0/virtio-backend [vhost-vsock]
/machine/peripheral/crypto0/virtio-backend [virtio-crypto]
/machine/peripheral-anon/device[2]/virtio-backend [virtio-scsi]
/machine/peripheral-anon/device[1]/virtio-backend [virtio-net]
/machine/peripheral-anon/device[0]/virtio-backend [virtio-serial]
QMP Form:
{ 'command': 'x-query-virtio',
'returns': ['VirtioInfo'],
'features': [ 'unstable' ] }
Example:
-> { "execute": "x-query-virtio" }
<- { "return": [
{
"path": "/machine/peripheral/vsock0/virtio-backend",
"name": "vhost-vsock"
},
{
"path": "/machine/peripheral/crypto0/virtio-backend",
"name": "virtio-crypto"
},
{
"path": "/machine/peripheral-anon/device[2]/virtio-backend",
"name": "virtio-scsi"
},
{
"path": "/machine/peripheral-anon/device[1]/virtio-backend",
"name": "virtio-net"
},
{
"path": "/machine/peripheral-anon/device[0]/virtio-backend",
"name": "virtio-serial"
}
]
}
2. Display status of a given virtio device
HMP Form:
info virtio-status <path>
Example:
(qemu) info virtio-status /machine/peripheral/vsock0/virtio-backend
/machine/peripheral/vsock0/virtio-backend:
device_name: vhost-vsock (vhost)
device_id: 19
vhost_started: true
bus_name: (null)
broken: false
disabled: false
disable_legacy_check: false
started: true
use_started: true
start_on_kick: false
use_guest_notifier_mask: true
vm_running: true
num_vqs: 3
queue_sel: 2
isr: 0
endianness: little
status: ACKNOWLEDGE, DRIVER, FEATURES_OK, DRIVER_OK
Guest features: EVENT_IDX, INDIRECT_DESC, VERSION_1
Host features: PROTOCOL_FEATURES, EVENT_IDX, INDIRECT_DESC, VERSION_1, ANY_LAYOUT,
NOTIFY_ON_EMPTY
Backend features:
VHost:
nvqs: 2
vq_index: 0
max_queues: 0
n_mem_sections: 4
n_tmp_sections: 4
backend_cap: 0
log_enabled: false
log_size: 0
Features: EVENT_IDX, INDIRECT_DESC, VERSION_1, ANY_LAYOUT, NOTIFY_ON_EMPTY
LOG_ALL
Acked features: EVENT_IDX, INDIRECT_DESC, VERSION_1
Backend features:
Protocol features:
QMP Form:
{ 'command': 'x-query-virtio-status',
'data': { 'path': 'str' },
'returns': 'VirtioStatus',
'features': [ 'unstable' ] }
Example:
-> { "execute": "x-query-virtio-status",
"arguments": { "path": "/machine/peripheral/vsock0/virtio-backend" }
}
<- { "return": {
"device-endian": "little",
"bus-name": "",
"disable-legacy-check": false,
"name": "vhost-vsock",
"started": true,
"device-id": 19,
"vhost-dev": {
"n-tmp-sections": 4,
"n-mem-sections": 4,
"max-queues": 0,
"backend-cap": 0,
"log-size": 0,
"backend-features": {
"transports": [],
"dev-features": []
},
"nvqs": 2,
"protocol-features": {
"protocols": []
},
"vq-index": 0,
"log-enabled": false,
"acked-features": {
"transports": ["EVENT_IDX", "INDIRECT_DESC", "VERSION_1"],
"dev-features": []
},
"features": {
"transports": ["EVENT_IDX", "INDIRECT_DESC", "VERSION_1", "ANY_LAYOUT",
"NOTIFY_ON_EMPTY"],
"dev-features": ["LOG_ALL"]
}
},
"backend-features": {
"transports": [],
"dev-features": []
},
"start-on-kick": false,
"isr": 0,
"broken": false,
"status": {
"statuses": ["ACKNOWLEDGE", "DRIVER", "FEATURES_OK", "DRIVER_OK"]
},
"num-vqs": 3,
"guest-features": {
"transports": ["EVENT_IDX", "INDIRECT_DESC", "VERSION_1"],
"dev-features": []
},
"host-features": {
"transports": ["PROTOCOL_FEATURES", "EVENT_IDX", "INDIRECT_DESC", "VERSION_1",
"ANY_LAYOUT", "NOTIFY_ON_EMPTY"],
"dev-features": []
},
"use-guest-notifier-mask": true,
"vm-running": true,
"queue-sel": 2,
"disabled": false,
"vhost-started": true,
"use-started": true
}
}
3. Display status of a given virtio queue
HMP Form:
info virtio-queue-status <path> <queue>
Example:
(qemu) info virtio-queue-status /machine/peripheral-anon/device[1]/virtio-backend 2
/machine/peripheral-anon/device[1]/virtio-backend:
device_name: virtio-net
queue_index: 2
inuse: 0
used_idx: 27
signalled_used: 27
signalled_used_valid: true
VRing:
num: 64
num_default: 64
align: 4096
desc: 0x00000001342b5000
avail: 0x00000001342b5400
used: 0x00000001342b54c0
QMP Form:
{ 'command': 'x-query-virtio-queue-status',
'data': { 'path': 'str', 'queue': 'uint16' },
'returns': 'VirtQueueStatus',
'features': [ 'unstable' ] }
Example:
-> { "execute": "x-query-virtio-queue-status",
"arguments": { "path": "/machine/peripheral-anon/device[1]/virtio-backend",
"queue": 2 }
}
<- { "return": {
"signalled-used": 27,
"inuse": 0,
"vring-align": 4096,
"vring-desc": 5170221056,
"signalled-used-valid": true,
"vring-num-default": 64,
"vring-avail": 5170222080,
"queue-index": 2,
"vring-used": 5170222272,
"used-idx": 27,
"name": "virtio-net",
"vring-num": 64 }
}
4. Display status of a given vhost queue
HMP Form:
info virtio-vhost-queue-status <path> <queue>
Example:
(qemu) info virtio-vhost-queue-status /machine/peripheral-anon/device[1]/virtio-backend 1
/machine/peripheral-anon/device[1]/virtio-backend:
device_name: virtio-net (vhost)
kick: 0
call: 0
VRing:
num: 256
desc: 0x00007f31c032c000
desc_phys: 0x00000001340c6000
desc_size: 4096
avail: 0x00007f31c032d000
avail_phys: 0x00000001340c7000
avail_size: 518
used: 0x00007f31c032d240
used_phys: 0x00000001340c7240
used_size: 2054
QMP Form:
{ 'command': 'x-query-virtio-vhost-queue-status',
'data': { 'path': 'str', 'queue': 'uint16' },
'returns': 'VirtVhostQueueStatus',
'features': [ 'unstable' ] }
Example:
-> { "execute": "x-query-virtio-vhost-queue-status",
"arguments": { "path": "/machine/peripheral-anon/device[1]/virtio-backend",
"queue": 1 }
}
<- { "return": {
"avail-phys": 5168197632,
"used-phys": 5168198208,
"avail-size": 518,
"desc-size": 4096,
"used-size": 2054,
"desc": 139851654676480,
"num": 256,
"name": "virtio-net",
"call": 0,
"avail": 139851654680576,
"desc-phys": 5168193536,
"used": 139851654681152,
"kick": 0 }
}
5. Display an element of a given virtio queue
HMP Form:
info virtio-queue-element <path> <queue> [index]
Example:
Dump the information of the head element of the third queue of virtio-scsi:
(qemu) info virtio-queue-element /machine/peripheral-anon/device[2]/virtio-backend 2
/machine/peripheral-anon/device[2]/virtio-backend:
device_name: virtio-scsi
index: 125
desc:
descs: addr 0xa4f90f1d0653b5fc len 1862028160 (used, avail, next)
avail:
flags: 0
idx: 2936
ring: 125
used:
flags: 0
idx: 2936
QMP Form:
{ 'command': 'x-query-virtio-queue-element',
'data': { 'path': 'str', 'queue': 'uint16', '*index': 'uint16' },
'returns': 'VirtioQueueElement',
'features': [ 'unstable' ] }
Example:
-> { "execute": "x-query-virtio-queue-element",
"arguments": { "path": "/machine/peripheral-anon/device[2]/virtio-backend",
"queue": 2 }
}
<- { "return": {
"index": 125,
"name": "virtio-scsi",
"descs": [
{ "flags": ["used", "avail", "next"],
"len": 1862028160,
"addr": 11887549308755752444 }
],
"avail": {
"idx": 2936,
"flags": 0,
"ring": 125
},
"used": {
"idx": 2936,
"flags": 0
}
}
}
v11: minor reformatting in virtio.json
added synchronicity check when querying virtio devices
v10: rebased for upstream (Qemu 7.0)
reformat virtio.json for better consistency
removed all enums from virtio.json; replaced with string literals
removed @ndescs from VirtioQueueElement
removed examples in hmp-commands-info.hx (to fix 'inconsistent
literal block quoting' error from Sphinx)
v9: rebased for upstream (Qemu 6.3)
change QMP command prefixes from 'x-debug-virtio' to
'x-query-virtio'
add 'unstable' feature to all 'x-query-virtio' prefixed
QMP commands
fix odd indentation for qapi/virtio.json
device features support for virtio-mem
move HMP sub-commands under 'virtio' top level to 'info'
top level
v8: add assert in virtio_id_to_name() to make sure we're
not returning NULL
minor documentation additions to qapi/virtio.json
add virtio introspection support for vhost-user-rng
v7: rebased for upstream (Qemu 6.2)
add ability to map between numberic device ID and
string device ID (name) for virtio devices
add get_vhost() callback function for VirtIODevices
expose more fields of VirtIODevice
expose fields of vhost devices
decode vhost user protocol features
decode VirtIODevice configuration statuses
vhost support for displaying virtio queue statuses
vhost support for displaying vhost queue statuses
expose driver and device areas when introspecting a
virtio queue element
changed patch attribution
v6: rebased for upstream (Qemu 6.1)
add all virtio/vhost types in same order as
include/standard-headers/linux/virtio_ids.h
use QAPI_LIST_PREPEND in qmp_x_debug_query_virtio rather than open
coding
v5: rebased for upstream
add device name, used index, and relative indicies to virtio queue-status
HMP command
add device name to virtio queue-status QMP command
add new virtio device features
v4: re-send series as v3 didn't reach qemu-devel
v3: use qapi_free_VirtioInfoList() on the head of the list, not on the tail.
Prefix the QMP commands with 'x-debug-'
v2: introduce VirtioType enum
use an enum for the endianness
change field names to stick to naming convertions (s/_/-/)
add a patch to decode feature bits
don't check if the queue is empty to allow display of old elements
use enum for desc flags
manage indirect desc
decode device features in the HMP command
Jonah Palmer (2):
virtio: drop name parameter for virtio_init()
virtio: add vhost support for virtio devices
Laurent Vivier (6):
qmp: add QMP command x-query-virtio
qmp: add QMP command x-query-virtio-status
qmp: decode feature & status bits in virtio-status
qmp: add QMP commands for virtio/vhost queue-status
qmp: add QMP command x-query-virtio-queue-element
hmp: add virtio commands
hmp-commands-info.hx | 70 +++
hw/9pfs/virtio-9p-device.c | 2 +-
hw/block/vhost-user-blk.c | 9 +-
hw/block/virtio-blk.c | 31 +-
hw/char/virtio-serial-bus.c | 14 +-
hw/display/vhost-user-gpu.c | 7 +
hw/display/virtio-gpu-base.c | 20 +-
hw/input/vhost-user-input.c | 7 +
hw/input/virtio-input.c | 13 +-
hw/net/virtio-net.c | 58 ++-
hw/scsi/vhost-scsi.c | 8 +
hw/scsi/virtio-scsi.c | 20 +-
hw/virtio/meson.build | 2 +
hw/virtio/vhost-user-fs.c | 20 +-
hw/virtio/vhost-user-i2c.c | 7 +-
hw/virtio/vhost-user-rng.c | 9 +-
hw/virtio/vhost-user-vsock.c | 2 +-
hw/virtio/vhost-vsock-common.c | 22 +-
hw/virtio/vhost-vsock.c | 2 +-
hw/virtio/vhost.c | 4 +-
hw/virtio/virtio-balloon.c | 17 +-
hw/virtio/virtio-crypto.c | 22 +-
hw/virtio/virtio-iommu.c | 17 +-
hw/virtio/virtio-mem.c | 14 +-
hw/virtio/virtio-pmem.c | 3 +-
hw/virtio/virtio-rng.c | 2 +-
hw/virtio/virtio-stub.c | 42 ++
hw/virtio/virtio.c | 742 ++++++++++++++++++++++++++++-
include/hw/virtio/vhost-vsock-common.h | 2 +-
include/hw/virtio/vhost.h | 3 +
include/hw/virtio/virtio-gpu.h | 3 +-
include/hw/virtio/virtio.h | 26 +-
include/monitor/hmp.h | 5 +
monitor/hmp-cmds.c | 311 ++++++++++++
qapi/meson.build | 1 +
qapi/qapi-schema.json | 1 +
qapi/virtio.json | 841 +++++++++++++++++++++++++++++++++
tests/qtest/qmp-cmd-test.c | 1 +
38 files changed, 2335 insertions(+), 45 deletions(-)
create mode 100644 hw/virtio/virtio-stub.c
create mode 100644 qapi/virtio.json
--
1.8.3.1
On Thu, Jan 20, 2022 at 06:29:20AM -0500, Jonah Palmer wrote:
> This series introduces new QMP/HMP commands to dump the status of a
> virtio device at different levels.
I dropped this patchset due to various build failures.
Pls take a look at Peter's comments on the pull request
to see some of these.
> [Jonah: Rebasing from previous patchset from Dec. 9 (v10). Original patches
> are by Laurnet Vivier from May 2020.
>
> Rebase from v10 to v11 mainly includes a check when querying or gathering
> any information about a virtio device. This check queries the QOM composition
> tree to make sure that the device (a) exists and (b) is realized before
> attempting to get any more information from it. This is done to get some
> kind of synchronicity between @virtio_list and the QOM composition tree.]
>
> 1. List available virtio devices in the machine
>
> HMP Form:
>
> info virtio
>
> Example:
>
> (qemu) info virtio
> /machine/peripheral/vsock0/virtio-backend [vhost-vsock]
> /machine/peripheral/crypto0/virtio-backend [virtio-crypto]
> /machine/peripheral-anon/device[2]/virtio-backend [virtio-scsi]
> /machine/peripheral-anon/device[1]/virtio-backend [virtio-net]
> /machine/peripheral-anon/device[0]/virtio-backend [virtio-serial]
>
> QMP Form:
>
> { 'command': 'x-query-virtio',
> 'returns': ['VirtioInfo'],
> 'features': [ 'unstable' ] }
>
> Example:
>
> -> { "execute": "x-query-virtio" }
> <- { "return": [
> {
> "path": "/machine/peripheral/vsock0/virtio-backend",
> "name": "vhost-vsock"
> },
> {
> "path": "/machine/peripheral/crypto0/virtio-backend",
> "name": "virtio-crypto"
> },
> {
> "path": "/machine/peripheral-anon/device[2]/virtio-backend",
> "name": "virtio-scsi"
> },
> {
> "path": "/machine/peripheral-anon/device[1]/virtio-backend",
> "name": "virtio-net"
> },
> {
> "path": "/machine/peripheral-anon/device[0]/virtio-backend",
> "name": "virtio-serial"
> }
> ]
> }
>
> 2. Display status of a given virtio device
>
> HMP Form:
>
> info virtio-status <path>
>
> Example:
>
> (qemu) info virtio-status /machine/peripheral/vsock0/virtio-backend
> /machine/peripheral/vsock0/virtio-backend:
> device_name: vhost-vsock (vhost)
> device_id: 19
> vhost_started: true
> bus_name: (null)
> broken: false
> disabled: false
> disable_legacy_check: false
> started: true
> use_started: true
> start_on_kick: false
> use_guest_notifier_mask: true
> vm_running: true
> num_vqs: 3
> queue_sel: 2
> isr: 0
> endianness: little
> status: ACKNOWLEDGE, DRIVER, FEATURES_OK, DRIVER_OK
> Guest features: EVENT_IDX, INDIRECT_DESC, VERSION_1
> Host features: PROTOCOL_FEATURES, EVENT_IDX, INDIRECT_DESC, VERSION_1, ANY_LAYOUT,
> NOTIFY_ON_EMPTY
> Backend features:
> VHost:
> nvqs: 2
> vq_index: 0
> max_queues: 0
> n_mem_sections: 4
> n_tmp_sections: 4
> backend_cap: 0
> log_enabled: false
> log_size: 0
> Features: EVENT_IDX, INDIRECT_DESC, VERSION_1, ANY_LAYOUT, NOTIFY_ON_EMPTY
> LOG_ALL
> Acked features: EVENT_IDX, INDIRECT_DESC, VERSION_1
> Backend features:
> Protocol features:
>
> QMP Form:
>
> { 'command': 'x-query-virtio-status',
> 'data': { 'path': 'str' },
> 'returns': 'VirtioStatus',
> 'features': [ 'unstable' ] }
>
> Example:
>
> -> { "execute": "x-query-virtio-status",
> "arguments": { "path": "/machine/peripheral/vsock0/virtio-backend" }
> }
> <- { "return": {
> "device-endian": "little",
> "bus-name": "",
> "disable-legacy-check": false,
> "name": "vhost-vsock",
> "started": true,
> "device-id": 19,
> "vhost-dev": {
> "n-tmp-sections": 4,
> "n-mem-sections": 4,
> "max-queues": 0,
> "backend-cap": 0,
> "log-size": 0,
> "backend-features": {
> "transports": [],
> "dev-features": []
> },
> "nvqs": 2,
> "protocol-features": {
> "protocols": []
> },
> "vq-index": 0,
> "log-enabled": false,
> "acked-features": {
> "transports": ["EVENT_IDX", "INDIRECT_DESC", "VERSION_1"],
> "dev-features": []
> },
> "features": {
> "transports": ["EVENT_IDX", "INDIRECT_DESC", "VERSION_1", "ANY_LAYOUT",
> "NOTIFY_ON_EMPTY"],
> "dev-features": ["LOG_ALL"]
> }
> },
> "backend-features": {
> "transports": [],
> "dev-features": []
> },
> "start-on-kick": false,
> "isr": 0,
> "broken": false,
> "status": {
> "statuses": ["ACKNOWLEDGE", "DRIVER", "FEATURES_OK", "DRIVER_OK"]
> },
> "num-vqs": 3,
> "guest-features": {
> "transports": ["EVENT_IDX", "INDIRECT_DESC", "VERSION_1"],
> "dev-features": []
> },
> "host-features": {
> "transports": ["PROTOCOL_FEATURES", "EVENT_IDX", "INDIRECT_DESC", "VERSION_1",
> "ANY_LAYOUT", "NOTIFY_ON_EMPTY"],
> "dev-features": []
> },
> "use-guest-notifier-mask": true,
> "vm-running": true,
> "queue-sel": 2,
> "disabled": false,
> "vhost-started": true,
> "use-started": true
> }
> }
>
>
> 3. Display status of a given virtio queue
>
> HMP Form:
>
> info virtio-queue-status <path> <queue>
>
> Example:
>
> (qemu) info virtio-queue-status /machine/peripheral-anon/device[1]/virtio-backend 2
> /machine/peripheral-anon/device[1]/virtio-backend:
> device_name: virtio-net
> queue_index: 2
> inuse: 0
> used_idx: 27
> signalled_used: 27
> signalled_used_valid: true
> VRing:
> num: 64
> num_default: 64
> align: 4096
> desc: 0x00000001342b5000
> avail: 0x00000001342b5400
> used: 0x00000001342b54c0
>
> QMP Form:
>
> { 'command': 'x-query-virtio-queue-status',
> 'data': { 'path': 'str', 'queue': 'uint16' },
> 'returns': 'VirtQueueStatus',
> 'features': [ 'unstable' ] }
>
> Example:
>
> -> { "execute": "x-query-virtio-queue-status",
> "arguments": { "path": "/machine/peripheral-anon/device[1]/virtio-backend",
> "queue": 2 }
> }
> <- { "return": {
> "signalled-used": 27,
> "inuse": 0,
> "vring-align": 4096,
> "vring-desc": 5170221056,
> "signalled-used-valid": true,
> "vring-num-default": 64,
> "vring-avail": 5170222080,
> "queue-index": 2,
> "vring-used": 5170222272,
> "used-idx": 27,
> "name": "virtio-net",
> "vring-num": 64 }
> }
>
> 4. Display status of a given vhost queue
>
> HMP Form:
>
> info virtio-vhost-queue-status <path> <queue>
>
> Example:
>
> (qemu) info virtio-vhost-queue-status /machine/peripheral-anon/device[1]/virtio-backend 1
> /machine/peripheral-anon/device[1]/virtio-backend:
> device_name: virtio-net (vhost)
> kick: 0
> call: 0
> VRing:
> num: 256
> desc: 0x00007f31c032c000
> desc_phys: 0x00000001340c6000
> desc_size: 4096
> avail: 0x00007f31c032d000
> avail_phys: 0x00000001340c7000
> avail_size: 518
> used: 0x00007f31c032d240
> used_phys: 0x00000001340c7240
> used_size: 2054
>
> QMP Form:
>
> { 'command': 'x-query-virtio-vhost-queue-status',
> 'data': { 'path': 'str', 'queue': 'uint16' },
> 'returns': 'VirtVhostQueueStatus',
> 'features': [ 'unstable' ] }
>
> Example:
>
> -> { "execute": "x-query-virtio-vhost-queue-status",
> "arguments": { "path": "/machine/peripheral-anon/device[1]/virtio-backend",
> "queue": 1 }
> }
> <- { "return": {
> "avail-phys": 5168197632,
> "used-phys": 5168198208,
> "avail-size": 518,
> "desc-size": 4096,
> "used-size": 2054,
> "desc": 139851654676480,
> "num": 256,
> "name": "virtio-net",
> "call": 0,
> "avail": 139851654680576,
> "desc-phys": 5168193536,
> "used": 139851654681152,
> "kick": 0 }
> }
>
> 5. Display an element of a given virtio queue
>
> HMP Form:
>
> info virtio-queue-element <path> <queue> [index]
>
> Example:
>
> Dump the information of the head element of the third queue of virtio-scsi:
>
> (qemu) info virtio-queue-element /machine/peripheral-anon/device[2]/virtio-backend 2
> /machine/peripheral-anon/device[2]/virtio-backend:
> device_name: virtio-scsi
> index: 125
> desc:
> descs: addr 0xa4f90f1d0653b5fc len 1862028160 (used, avail, next)
> avail:
> flags: 0
> idx: 2936
> ring: 125
> used:
> flags: 0
> idx: 2936
>
> QMP Form:
>
> { 'command': 'x-query-virtio-queue-element',
> 'data': { 'path': 'str', 'queue': 'uint16', '*index': 'uint16' },
> 'returns': 'VirtioQueueElement',
> 'features': [ 'unstable' ] }
>
> Example:
>
> -> { "execute": "x-query-virtio-queue-element",
> "arguments": { "path": "/machine/peripheral-anon/device[2]/virtio-backend",
> "queue": 2 }
> }
> <- { "return": {
> "index": 125,
> "name": "virtio-scsi",
> "descs": [
> { "flags": ["used", "avail", "next"],
> "len": 1862028160,
> "addr": 11887549308755752444 }
> ],
> "avail": {
> "idx": 2936,
> "flags": 0,
> "ring": 125
> },
> "used": {
> "idx": 2936,
> "flags": 0
> }
> }
> }
>
> v11: minor reformatting in virtio.json
> added synchronicity check when querying virtio devices
>
> v10: rebased for upstream (Qemu 7.0)
> reformat virtio.json for better consistency
> removed all enums from virtio.json; replaced with string literals
> removed @ndescs from VirtioQueueElement
> removed examples in hmp-commands-info.hx (to fix 'inconsistent
> literal block quoting' error from Sphinx)
>
> v9: rebased for upstream (Qemu 6.3)
> change QMP command prefixes from 'x-debug-virtio' to
> 'x-query-virtio'
> add 'unstable' feature to all 'x-query-virtio' prefixed
> QMP commands
> fix odd indentation for qapi/virtio.json
> device features support for virtio-mem
> move HMP sub-commands under 'virtio' top level to 'info'
> top level
>
> v8: add assert in virtio_id_to_name() to make sure we're
> not returning NULL
> minor documentation additions to qapi/virtio.json
> add virtio introspection support for vhost-user-rng
>
> v7: rebased for upstream (Qemu 6.2)
> add ability to map between numberic device ID and
> string device ID (name) for virtio devices
> add get_vhost() callback function for VirtIODevices
> expose more fields of VirtIODevice
> expose fields of vhost devices
> decode vhost user protocol features
> decode VirtIODevice configuration statuses
> vhost support for displaying virtio queue statuses
> vhost support for displaying vhost queue statuses
> expose driver and device areas when introspecting a
> virtio queue element
> changed patch attribution
>
> v6: rebased for upstream (Qemu 6.1)
> add all virtio/vhost types in same order as
> include/standard-headers/linux/virtio_ids.h
> use QAPI_LIST_PREPEND in qmp_x_debug_query_virtio rather than open
> coding
>
> v5: rebased for upstream
> add device name, used index, and relative indicies to virtio queue-status
> HMP command
> add device name to virtio queue-status QMP command
> add new virtio device features
>
> v4: re-send series as v3 didn't reach qemu-devel
>
> v3: use qapi_free_VirtioInfoList() on the head of the list, not on the tail.
> Prefix the QMP commands with 'x-debug-'
>
> v2: introduce VirtioType enum
> use an enum for the endianness
> change field names to stick to naming convertions (s/_/-/)
> add a patch to decode feature bits
> don't check if the queue is empty to allow display of old elements
> use enum for desc flags
> manage indirect desc
> decode device features in the HMP command
>
> Jonah Palmer (2):
> virtio: drop name parameter for virtio_init()
> virtio: add vhost support for virtio devices
>
> Laurent Vivier (6):
> qmp: add QMP command x-query-virtio
> qmp: add QMP command x-query-virtio-status
> qmp: decode feature & status bits in virtio-status
> qmp: add QMP commands for virtio/vhost queue-status
> qmp: add QMP command x-query-virtio-queue-element
> hmp: add virtio commands
>
> hmp-commands-info.hx | 70 +++
> hw/9pfs/virtio-9p-device.c | 2 +-
> hw/block/vhost-user-blk.c | 9 +-
> hw/block/virtio-blk.c | 31 +-
> hw/char/virtio-serial-bus.c | 14 +-
> hw/display/vhost-user-gpu.c | 7 +
> hw/display/virtio-gpu-base.c | 20 +-
> hw/input/vhost-user-input.c | 7 +
> hw/input/virtio-input.c | 13 +-
> hw/net/virtio-net.c | 58 ++-
> hw/scsi/vhost-scsi.c | 8 +
> hw/scsi/virtio-scsi.c | 20 +-
> hw/virtio/meson.build | 2 +
> hw/virtio/vhost-user-fs.c | 20 +-
> hw/virtio/vhost-user-i2c.c | 7 +-
> hw/virtio/vhost-user-rng.c | 9 +-
> hw/virtio/vhost-user-vsock.c | 2 +-
> hw/virtio/vhost-vsock-common.c | 22 +-
> hw/virtio/vhost-vsock.c | 2 +-
> hw/virtio/vhost.c | 4 +-
> hw/virtio/virtio-balloon.c | 17 +-
> hw/virtio/virtio-crypto.c | 22 +-
> hw/virtio/virtio-iommu.c | 17 +-
> hw/virtio/virtio-mem.c | 14 +-
> hw/virtio/virtio-pmem.c | 3 +-
> hw/virtio/virtio-rng.c | 2 +-
> hw/virtio/virtio-stub.c | 42 ++
> hw/virtio/virtio.c | 742 ++++++++++++++++++++++++++++-
> include/hw/virtio/vhost-vsock-common.h | 2 +-
> include/hw/virtio/vhost.h | 3 +
> include/hw/virtio/virtio-gpu.h | 3 +-
> include/hw/virtio/virtio.h | 26 +-
> include/monitor/hmp.h | 5 +
> monitor/hmp-cmds.c | 311 ++++++++++++
> qapi/meson.build | 1 +
> qapi/qapi-schema.json | 1 +
> qapi/virtio.json | 841 +++++++++++++++++++++++++++++++++
> tests/qtest/qmp-cmd-test.c | 1 +
> 38 files changed, 2335 insertions(+), 45 deletions(-)
> create mode 100644 hw/virtio/virtio-stub.c
> create mode 100644 qapi/virtio.json
>
> --
> 1.8.3.1
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