This adds a new command to QMP: query-device-slots. It will allow
management software to query possible slots where devices can be
plugged.
This implementation of the command will return:
* Multiple PCI slots per bus, in the case of PCI buses;
* One slot per bus in the case of the other buses;
* One slot for each entry from query-hotpluggable-cpus.
In the example below, I am not sure if the PCIe ports are all
supposed to report all slots, but I didn't find any existing
field in PCIBus that would help me figure out the actual number
of slots in a given PCI bus.
Git tree
--------
This patch needs the previous query-machines series I am working
on. The full tree can be found on the git tree at:
git://github.com/ehabkost/qemu-hacks.git work/query-machines-bus-info
Example output
--------------
The following output was returned by QEMU when running it as:
$ qemu-system-x86_64 -machine q35 \
-readconfig docs/q35-chipset.cfg \
-smp 4,maxcpus=8,sockets=2,cores=2,threads=2
{
"return": [
{
"available": false,
"devices": [
"/machine/unattached/device[30]",
"/machine/unattached/device[29]",
"/machine/unattached/device[28]",
"/machine/unattached/device[27]",
"/machine/unattached/device[26]",
"/machine/unattached/device[25]",
"/machine/unattached/device[24]",
"/machine/unattached/device[23]"
],
"accepted-device-types": [
"i2c-slave"
],
"props": {
"bus": "/machine/unattached/device[22]/i2c"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"ide-device"
],
"props": {
"bus": "/machine/unattached/device[20]/ide.4"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"ide-device"
],
"props": {
"bus": "/machine/unattached/device[20]/ide.5"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"ide-device"
],
"props": {
"bus": "/machine/unattached/device[20]/ide.0"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"ide-device"
],
"props": {
"bus": "/machine/unattached/device[20]/ide.1"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": false,
"devices": [
"/machine/unattached/device[21]"
],
"accepted-device-types": [
"ide-device"
],
"props": {
"bus": "/machine/unattached/device[20]/ide.2"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"ide-device"
],
"props": {
"bus": "/machine/unattached/device[20]/ide.3"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": false,
"devices": [
"/machine/unattached/device[8]",
"/machine/q35/ioapic",
"/machine/q35",
"/machine/fw_cfg",
"/machine/unattached/device[1]"
],
"accepted-device-types": [
"sys-bus-device"
],
"props": {
"bus": "/machine/unattached/sysbus"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": false,
"devices": [
"/machine/unattached/device[19]",
"/machine/unattached/device[18]",
"/machine/unattached/device[17]",
"/machine/unattached/device[16]",
"/machine/unattached/device[15]",
"/machine/unattached/device[14]",
"/machine/unattached/device[13]",
"/machine/unattached/device[12]",
"/machine/unattached/device[11]",
"/machine/unattached/device[10]",
"/machine/unattached/device[9]",
"/machine/unattached/device[7]",
"/machine/unattached/device[6]"
],
"accepted-device-types": [
"isa-device"
],
"props": {
"bus": "/machine/unattached/device[5]/isa.0"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": false,
"devices": [
"/machine/q35/mch"
],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 0
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/unattached/device[31]"
],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 8
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/unattached/device[32]"
],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 16
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 24
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 32
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 40
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 48
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 56
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 64
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 72
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 80
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 88
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 96
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 104
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 112
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 120
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 128
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 136
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 144
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 152
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 160
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 168
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 176
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 184
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 192
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 200
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/peripheral/ich9-uhci-4"
],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 208
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/peripheral/ich9-hda-audio"
],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 216
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/peripheral/ich9-pcie-port-1"
],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 224
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/peripheral/ich9-uhci-1"
],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 232
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/peripheral/ich9-pci-bridge"
],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 240
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/unattached/device[5]"
],
"accepted-device-types": [
"legacy-pci-device",
"pci-express-device"
],
"props": {
"bus": "/machine/q35/pcie.0",
"addr": 248
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 0
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 8
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 16
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 24
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 32
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 40
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 48
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 56
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 64
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 72
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 80
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 88
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 96
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 104
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 112
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 120
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 128
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 136
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 144
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 152
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 160
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 168
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 176
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 184
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 192
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 200
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1",
"addr": 208
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
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},
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"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 24
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 32
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 40
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 48
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 56
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 64
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 72
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 80
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 88
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 96
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 104
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 112
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 120
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 128
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 136
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 144
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 152
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 160
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 168
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 176
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 184
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 192
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 200
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 208
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 216
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 224
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 232
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 240
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"pci-express-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pcie-port-4/ich9-pcie-port-4",
"addr": 248
},
"hotpluggable": true,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 0
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 8
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 16
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 24
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 32
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 40
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 48
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 56
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 64
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 72
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 80
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 88
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 96
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 104
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 112
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 120
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 128
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 136
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 144
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 152
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 160
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 168
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 176
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 184
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 192
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 200
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 208
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 216
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 224
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 232
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 240
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"legacy-pci-device"
],
"props": {
"bus": "/machine/peripheral/ich9-pci-bridge/ich9-pci-bridge",
"addr": 248
},
"hotpluggable": false,
"type": "pci",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"usb-device"
],
"props": {
"bus": "/machine/peripheral/ich9-ehci-1/ich9-ehci-1.0"
},
"hotpluggable": true,
"type": "generic"
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"usb-device"
],
"props": {
"bus": "/machine/peripheral/ich9-ehci-2/ich9-ehci-2.0"
},
"hotpluggable": true,
"type": "generic"
},
{
"available": false,
"devices": [],
"accepted-device-types": [
"hda-codec"
],
"props": {
"bus": "/machine/peripheral/ich9-hda-audio/ich9-hda-audio.0"
},
"hotpluggable": false,
"type": "generic"
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"qemu64-x86_64-cpu"
],
"props": {
"socket-id": 1,
"core-id": 1,
"thread-id": 1
},
"hotpluggable": true,
"type": "cpu",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"qemu64-x86_64-cpu"
],
"props": {
"socket-id": 1,
"core-id": 1,
"thread-id": 0
},
"hotpluggable": true,
"type": "cpu",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"qemu64-x86_64-cpu"
],
"props": {
"socket-id": 1,
"core-id": 0,
"thread-id": 1
},
"hotpluggable": true,
"type": "cpu",
"max-devices": 1
},
{
"available": true,
"devices": [],
"accepted-device-types": [
"qemu64-x86_64-cpu"
],
"props": {
"socket-id": 1,
"core-id": 0,
"thread-id": 0
},
"hotpluggable": true,
"type": "cpu",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/unattached/device[4]"
],
"accepted-device-types": [
"qemu64-x86_64-cpu"
],
"props": {
"socket-id": 0,
"core-id": 1,
"thread-id": 1
},
"hotpluggable": true,
"type": "cpu",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/unattached/device[3]"
],
"accepted-device-types": [
"qemu64-x86_64-cpu"
],
"props": {
"socket-id": 0,
"core-id": 1,
"thread-id": 0
},
"hotpluggable": true,
"type": "cpu",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/unattached/device[2]"
],
"accepted-device-types": [
"qemu64-x86_64-cpu"
],
"props": {
"socket-id": 0,
"core-id": 0,
"thread-id": 1
},
"hotpluggable": true,
"type": "cpu",
"max-devices": 1
},
{
"available": false,
"devices": [
"/machine/unattached/device[0]"
],
"accepted-device-types": [
"qemu64-x86_64-cpu"
],
"props": {
"socket-id": 0,
"core-id": 0,
"thread-id": 0
},
"hotpluggable": true,
"type": "cpu",
"max-devices": 1
}
]
}
Signed-off-by: Eduardo Habkost <ehabkost@xxxxxxxxxx>
---
qapi-schema.json | 114 +++++++++++++++++++++++++++++++++++++++++++++++++
include/hw/qdev-core.h | 6 +++
hw/core/bus.c | 49 +++++++++++++++++++++
hw/pci/pci.c | 106 +++++++++++++++++++++++++++++++++------------
qdev-monitor.c | 86 ++++++++++++++++++++++++++++++++++---
5 files changed, 328 insertions(+), 33 deletions(-)
diff --git a/qapi-schema.json b/qapi-schema.json
index d48ff3f..484d91e 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3166,6 +3166,120 @@
{ 'command': 'closefd', 'data': {'fdname': 'str'} }
##
+# @DeviceSlotType:
+#
+# Type of device slot
+#
+# @generic: Generic device slot, with no bus-specific information
+# @pci: PCI device slot
+# @cpu: CPU device slot
+##
+{ 'enum': 'DeviceSlotType',
+ 'data': ['generic', 'pci', 'cpu'] }
+
+##
+# @DeviceSlotInfo:
+#
+# Information on a slot where devices can be plugged. Some buses
+# are represented as a single slot that can support multiple devices,
+# and some buses have multiple slots that are identified by arguments
+# to @device_add.
+#
+# @bus: ID of the bus object where the device can be plugged. Optional,
+# as some devices don't need a bus to be plugged (e.g. CPUs).
+# Can be copied to the "bus" argument to @device_add.
+#
+# @type: type of device slot.
+#
+# @accepted-device-types: List of device types accepted by the slot.
+# Any device plugged to the slot should implement
+# one of the accepted device types.
+#
+# @max-devices: #optional maximum number of devices that can be plugged
+# to the slot.
+#
+# @devices: List of QOM paths for devices that are already plugged.
+#
+# @available: If false, the slot is not available for plugging any device.
+# This value can change at runtime if condition changes
+# (e.g. if the device becomes full, or if the machine
+# was already initialized and the slot doesn't support
+# hotplug).
+#
+# @hotpluggable: If true, the slot accepts hotplugged devices.
+#
+# DeviceSlotInfo structs always have a @props member, whose members
+# can be directly copied to the arguments to @device_add.
+##
+{ 'union': 'DeviceSlotInfo',
+ 'base': { 'type': 'DeviceSlotType',
+ 'accepted-device-types': [ 'str' ],
+ '*max-devices': 'int', 'devices': [ 'str' ],
+ 'available': 'bool', 'hotpluggable': 'bool' },
+ 'discriminator': 'type',
+ 'data': { 'generic': 'GenericSlotInfo',
+ 'pci': 'PCISlotInfo',
+ 'cpu': 'CPUSlotInfo' } }
+
+##
+# @GenericSlotProperties:
+##
+{ 'struct': 'GenericSlotProperties',
+ 'data': { 'bus': 'str' } }
+
+
+##
+# @GenericSlotInfo:
+#
+# Generic slot information, with no bus-specific information
+##
+{ 'struct': 'GenericSlotInfo',
+ 'data': { 'props': 'GenericSlotProperties' } }
+
+##
+# @PCIDeviceSlotProperties:
+#
+# Properties that can be set when plugging a PCI device.
+#
+# @addr: "addr" argument to @device_add.
+#
+#FIXME: replace @addr with slot and function properties.
+##
+{ 'struct': 'PCIDeviceSlotProperties',
+ 'data': { 'bus': 'str', 'addr': 'int' } }
+
+##
+# @PCISlotInfo:
+#
+# Information on a PCI device slot.
+#
+# @props: The @device_add arguments that can be used when plugging
+# the device.
+##
+{ 'struct': 'PCISlotInfo',
+ 'data': { 'props': 'PCIDeviceSlotProperties' } }
+
+##
+# @CPUSlotInfo:
+#
+# Information on a CPU device slot.
+#
+# @props: The @device_add arguments that can be used when plugging
+# the device.
+##
+{ 'struct': 'CPUSlotInfo',
+ 'data': { 'props': 'CpuInstanceProperties' } }
+
+##
+# @query-device-slots:
+#
+# Return the list of possible slots for plugging devices using
+# @device_add.
+##
+{ 'command': 'query-device-slots',
+ 'returns': [ 'DeviceSlotInfo' ] }
+
+##
# @MachineBusInfo
#
# Information about a bus present on a machine.
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index a7f9ac4..7a87234 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -214,6 +214,10 @@ struct BusClass {
* but on some cases bus instances may override it.
*/
const char *device_type;
+
+ /*TOD: write doc */
+ DeviceSlotInfoList *(*enumerate_slots)(BusState *bus, Error **errp);
+
};
typedef struct BusChild {
@@ -412,4 +416,6 @@ static inline bool qbus_is_hotpluggable(BusState *bus)
void device_listener_register(DeviceListener *listener);
void device_listener_unregister(DeviceListener *listener);
+bool qbus_is_full(BusState *bus);
+
#endif
diff --git a/hw/core/bus.c b/hw/core/bus.c
index d2bf717..58b5c3d 100644
--- a/hw/core/bus.c
+++ b/hw/core/bus.c
@@ -21,6 +21,7 @@
#include "qemu-common.h"
#include "hw/qdev.h"
#include "qapi/error.h"
+#include "qapi/clone-visitor.h"
#include "qapi-visit.h"
static void qbus_set_hotplug_handler_internal(BusState *bus, Object *handler,
@@ -225,12 +226,60 @@ static void bus_get_device_type(Object *obj, Visitor *v,
visit_type_strList(v, NULL, &bus->accepted_device_types, errp);
}
+bool qbus_is_full(BusState *bus)
+{
+ BusClass *bus_class = BUS_GET_CLASS(bus);
+ return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
+}
+
+/* Generic slot enumeration function: will return a single slot
+ * for the bus, with max_devices set to BusClass::max_dev, if set.
+ */
+static DeviceSlotInfoList *bus_generic_enumerate_slots(BusState *bus, Error **errp)
+{
+ Error *local_err = NULL;
+ BusClass *bc = BUS_GET_CLASS(bus);
+ strList **devlist;
+ BusChild *kid;
+ DeviceSlotInfoList *r = g_new0(DeviceSlotInfoList, 1);
+
+ r->value = g_new0(DeviceSlotInfo, 1);
+ r->value->type = DEVICE_SLOT_TYPE_GENERIC;
+ r->value->has_max_devices = bc->max_dev > 0;
+ r->value->max_devices = bc->max_dev;
+ r->value->accepted_device_types = QAPI_CLONE(strList, bus->accepted_device_types);
+ r->value->u.generic.props = g_new0(GenericSlotProperties, 1);
+ r->value->u.generic.props->bus = object_get_canonical_path(OBJECT(bus));
+
+ devlist = &r->value->devices;
+ QTAILQ_FOREACH(kid, &bus->children, sibling) {
+ DeviceState *dev = kid->child;
+ strList *item = g_new0(strList, 1);
+ item->value = object_get_canonical_path(OBJECT(dev));
+ *devlist = item;
+ devlist = &item->next;
+ }
+ r->value->hotpluggable = qbus_is_hotpluggable(bus);
+
+ /* Conditions that make a bus unavailable:
+ * - Bus already full
+ * - Hotplug when the bus is not hotpluggable
+ */
+ r->value->available =
+ !(qbus_is_full(bus) ||
+ (qdev_hotplug && !qbus_is_hotpluggable(bus)));
+
+ error_propagate(errp, local_err);
+ return r;
+}
+
static void bus_class_init(ObjectClass *class, void *data)
{
BusClass *bc = BUS_CLASS(class);
class->unparent = bus_unparent;
bc->get_fw_dev_path = default_bus_get_fw_dev_path;
+ bc->enumerate_slots = bus_generic_enumerate_slots;
object_class_property_add(class, "accepted-device-types", "strList",
bus_get_device_type, NULL, NULL, NULL,
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 2eac71a..9bcc116 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -41,6 +41,7 @@
#include "hw/hotplug.h"
#include "hw/boards.h"
#include "qemu/cutils.h"
+#include "qapi/clone-visitor.h"
//#define DEBUG_PCI
#ifdef DEBUG_PCI
@@ -141,6 +142,8 @@ static uint16_t pcibus_numa_node(PCIBus *bus)
return NUMA_NODE_UNASSIGNED;
}
+static DeviceSlotInfoList *pci_bus_enumerate_slots(BusState *bus, Error **errp);
+
static void pci_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *k = BUS_CLASS(klass);
@@ -156,6 +159,7 @@ static void pci_bus_class_init(ObjectClass *klass, void *data)
* but overrides BusClass::device_type to INTERFACE_PCIE_DEVICE
*/
k->device_type = INTERFACE_LEGACY_PCI_DEVICE;
+ k->enumerate_slots = pci_bus_enumerate_slots;
pbc->is_root = pcibus_is_root;
pbc->bus_num = pcibus_num;
@@ -967,6 +971,81 @@ uint16_t pci_requester_id(PCIDevice *dev)
return pci_req_id_cache_extract(&dev->requester_id_cache);
}
+static bool pci_bus_has_pcie_upstream_port(PCIBus *bus)
+{
+ PCIDevice *parent_dev = pci_bridge_get_device(bus);
+
+ /* Device associated with an upstream port.
+ * As there are several types of these, it's easier to check the
+ * parent device: upstream ports are always connected to
+ * root or downstream ports.
+ */
+ return parent_dev &&
+ pci_is_express(parent_dev) &&
+ parent_dev->exp.exp_cap &&
+ (pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_ROOT_PORT ||
+ pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_DOWNSTREAM);
+}
+
+static PCIDevice *pci_bus_get_function_0(PCIBus *bus, int devfn)
+{
+ if(pci_bus_has_pcie_upstream_port(bus)) {
+ /* With an upstream PCIe port, we only support 1 device at slot 0 */
+ return bus->devices[0];
+ } else {
+ /* Other bus types might support multiple devices at slots 0-31 */
+ return bus->devices[PCI_DEVFN(PCI_SLOT(devfn), 0)];
+ }
+}
+
+PCIDevice *pci_get_function_0(PCIDevice *pci_dev)
+{
+ return pci_bus_get_function_0(pci_dev->bus, pci_dev->devfn);
+}
+
+static DeviceSlotInfoList *pci_bus_enumerate_slots(BusState *bus, Error **errp)
+{
+ PCIBus *pb = PCI_BUS(bus);
+ int devfn;
+ DeviceSlotInfoList *r = NULL;
+ DeviceSlotInfoList **next = &r;
+
+ for(devfn = pb->devfn_min; devfn < ARRAY_SIZE(pb->devices);
+ devfn += PCI_FUNC_MAX) {
+ DeviceSlotInfoList *i = g_new0(DeviceSlotInfoList, 1);
+ i->value = g_new0(DeviceSlotInfo, 1);
+ i->value->type = DEVICE_SLOT_TYPE_PCI;
+ i->value->has_max_devices = true;
+ i->value->max_devices = 1;
+ i->value->u.pci.props = g_new0(PCIDeviceSlotProperties, 1);
+ i->value->u.pci.props->bus = object_get_canonical_path(OBJECT(bus));
+ i->value->u.pci.props->addr = devfn;
+ /*TODO: add info about accepting only bridges on extra PCI root buses */
+ i->value->accepted_device_types = QAPI_CLONE(strList, bus->accepted_device_types);
+ if (pb->devices[devfn]) {
+ i->value->devices = g_new0(strList, 1);
+ i->value->devices->value =
+ object_get_canonical_path(OBJECT(pb->devices[devfn]));
+ }
+
+ i->value->hotpluggable = qbus_is_hotpluggable(bus);
+ /* Conditions that make a devfn unavailable:
+ * - Hotplug when function 0 is already occupied
+ * - devfn already occupied by a device
+ * - Hotplug when the bus is not hotpluggable
+ */
+ i->value->available =
+ !((qdev_hotplug && pci_bus_get_function_0(pb, devfn)) ||
+ (pb->devices[devfn]) ||
+ (qdev_hotplug && !qbus_is_hotpluggable(bus)));
+
+ *next = i;
+ next = &i->next;
+ }
+
+ return r;
+}
+
/* -1 for devfn means auto assign */
static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
const char *name, int devfn,
@@ -2607,33 +2686,6 @@ void pci_bus_get_w64_range(PCIBus *bus, Range *range)
pci_for_each_device_under_bus(bus, pci_dev_get_w64, range);
}
-static bool pcie_has_upstream_port(PCIDevice *dev)
-{
- PCIDevice *parent_dev = pci_bridge_get_device(dev->bus);
-
- /* Device associated with an upstream port.
- * As there are several types of these, it's easier to check the
- * parent device: upstream ports are always connected to
- * root or downstream ports.
- */
- return parent_dev &&
- pci_is_express(parent_dev) &&
- parent_dev->exp.exp_cap &&
- (pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_ROOT_PORT ||
- pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_DOWNSTREAM);
-}
-
-PCIDevice *pci_get_function_0(PCIDevice *pci_dev)
-{
- if(pcie_has_upstream_port(pci_dev)) {
- /* With an upstream PCIe port, we only support 1 device at slot 0 */
- return pci_dev->bus->devices[0];
- } else {
- /* Other bus types might support multiple devices at slots 0-31 */
- return pci_dev->bus->devices[PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 0)];
- }
-}
-
MSIMessage pci_get_msi_message(PCIDevice *dev, int vector)
{
MSIMessage msg;
diff --git a/qdev-monitor.c b/qdev-monitor.c
index c73410c..b4071c4 100644
--- a/qdev-monitor.c
+++ b/qdev-monitor.c
@@ -29,6 +29,8 @@
#include "qemu/error-report.h"
#include "qemu/help_option.h"
#include "sysemu/block-backend.h"
+#include "qapi/clone-visitor.h"
+#include "hw/boards.h"
/*
* Aliases were a bad idea from the start. Let's keep them
@@ -399,12 +401,6 @@ static DeviceState *qbus_find_dev(BusState *bus, char *elem)
return NULL;
}
-static inline bool qbus_is_full(BusState *bus)
-{
- BusClass *bus_class = BUS_GET_CLASS(bus);
- return bus_class->max_dev && bus->max_index >= bus_class->max_dev;
-}
-
/*
* Search the tree rooted at @bus for a bus.
* If @name, search for a bus with that name. Note that bus names
@@ -631,6 +627,84 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
return dev;
}
+typedef struct SlotListState {
+ DeviceSlotInfoList *result;
+ DeviceSlotInfoList **next;
+ Error *err;
+} SlotListState;
+
+static int walk_bus(Object *obj, void *opaque)
+{
+ SlotListState *s = opaque;
+ if (object_dynamic_cast(obj, TYPE_BUS)) {
+ BusState *bus = BUS(obj);
+ BusClass *bc = BUS_GET_CLASS(bus);
+ DeviceSlotInfoList *l = bc->enumerate_slots(bus, &s->err);
+ *s->next = l;
+ for (; l; l = l->next) {
+ s->next = &l->next;
+ }
+ if (s->err) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+DeviceSlotInfoList *qmp_query_device_slots(Error **errp)
+{
+ SlotListState s = { };
+ MachineState *ms = MACHINE(qdev_get_machine());
+ MachineClass *mc = MACHINE_GET_CLASS(ms);
+
+ s.next = &s.result;
+
+ /* We build the device slot list from two sources:
+ * 1) Calling the BusClass::enumerate_slots() method on all buses;
+ * 2) The return value of MachineClass::query_hotpluggable_cpus()
+ */
+
+
+ object_child_foreach_recursive(qdev_get_machine(), walk_bus, &s);
+ if (s.err) {
+ goto out;
+ }
+
+ if (mc->query_hotpluggable_cpus) {
+ HotpluggableCPUList *hcl = mc->query_hotpluggable_cpus(ms);
+ HotpluggableCPUList *i;
+
+ for (i = hcl; i; i = i->next) {
+ DeviceSlotInfoList *r = g_new0(DeviceSlotInfoList, 1);
+ HotpluggableCPU *hc = i->value;
+ r->value = g_new0(DeviceSlotInfo, 1);
+ r->value->type = DEVICE_SLOT_TYPE_CPU;
+ r->value->accepted_device_types = g_new0(strList, 1);
+ r->value->accepted_device_types->value = g_strdup(hc->type);
+ r->value->has_max_devices = true;
+ r->value->max_devices = 1;
+ r->value->available = !hc->has_qom_path;
+ /*TODO: should it be always true? */
+ r->value->hotpluggable = true;
+
+ if (hc->has_qom_path) {
+ r->value->devices = g_new0(strList, 1);
+ r->value->devices->value = g_strdup(hc->qom_path);
+ }
+ r->value->u.cpu.props = QAPI_CLONE(CpuInstanceProperties,
+ hc->props);
+ *s.next = r;
+ s.next = & r->next;
+ }
+
+ qapi_free_HotpluggableCPUList(hcl);
+ }
+
+out:
+ error_propagate(errp, s.err);
+ return s.result;
+}
+
#define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
static void qbus_print(Monitor *mon, BusState *bus, int indent);
--
2.7.4
--
Eduardo
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