[libvirt] [RFC] qmp: query-device-slots command

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": [], "accepted-device-types": [ "pci-express-device" ], "props": { "bus": "/machine/peripheral/ich9-pcie-port-1/ich9-pcie-port-1", "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-1/ich9-pcie-port-1", "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-1/ich9-pcie-port-1", "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-1/ich9-pcie-port-1", "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-1/ich9-pcie-port-1", "addr": 248 }, "hotpluggable": true, "type": "pci", "max-devices": 1 }, { "available": true, "devices": [], "accepted-device-types": [ "pci-express-device" ], "props": { "bus": "/machine/peripheral/ich9-pcie-port-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "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-2/ich9-pcie-port-2", "addr": 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"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(a)redhat.com&gt; --- 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