$ virsh qemu-monitor-command cvm1 --pretty \
    '{"execute":"query-command-line-options"}'
{
    "return": [
        {
            "parameters": [
                {
                    "name": "initiator-name",
                    "help": "Initiator iqn name to use when connecting",
                    "type": "string"
                },
                {
                    "name": "header-digest",
                    "help": "HeaderDigest setting. {CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
                    "type": "string"
                },
                {
                    "name": "password",
                    "help": "password for CHAP authentication to target",
                    "type": "string"
                },
                {
                    "name": "user",
                    "help": "username for CHAP authentication to target",
                    "type": "string"
                }
            ],
            "option": "iscsi"
        },
        {
            "parameters": [
                {
                    "name": "non-adaptive",
                    "type": "boolean"
                },
                {
                    "name": "lossy",
                    "type": "boolean"
                },
                {
                    "name": "acl",
                    "type": "boolean"
                },
                {
                    "name": "x509verify",
                    "type": "string"
                },
                {
                    "name": "tls",
                    "type": "boolean"
                },
                {
                    "name": "sasl",
                    "type": "boolean"
                },
                {
                    "name": "lock-key-sync",
                    "type": "boolean"
                },
                {
                    "name": "reverse",
                    "type": "boolean"
                },
                {
                    "name": "password",
                    "type": "boolean"
                },
                {
                    "name": "ipv6",
                    "type": "boolean"
                },
                {
                    "name": "ipv4",
                    "type": "boolean"
                },
                {
                    "name": "to",
                    "type": "number"
                },
                {
                    "name": "connections",
                    "type": "number"
                },
                {
                    "name": "head",
                    "type": "number"
                },
                {
                    "name": "display",
                    "type": "string"
                },
                {
                    "name": "share",
                    "type": "string"
                },
                {
                    "name": "x509",
                    "type": "string"
                },
                {
                    "name": "websocket",
                    "type": "string"
                },
                {
                    "name": "vnc",
                    "type": "string"
                }
            ],
            "option": "vnc"
        },
        {
            "parameters": [
                {
                    "name": "seamless-migration",
                    "type": "boolean"
                },
                {
                    "name": "playback-compression",
                    "type": "boolean"
                },
                {
                    "name": "agent-mouse",
                    "type": "boolean"
                },
                {
                    "name": "streaming-video",
                    "type": "string"
                },
                {
                    "name": "zlib-glz-wan-compression",
                    "type": "string"
                },
                {
                    "name": "jpeg-wan-compression",
                    "type": "string"
                },
                {
                    "name": "image-compression",
                    "type": "string"
                },
                {
                    "name": "plaintext-channel",
                    "type": "string"
                },
                {
                    "name": "tls-channel",
                    "type": "string"
                },
                {
                    "name": "tls-ciphers",
                    "type": "string"
                },
                {
                    "name": "x509-dh-key-file",
                    "type": "string"
                },
                {
                    "name": "x509-cacert-file",
                    "type": "string"
                },
                {
                    "name": "x509-cert-file",
                    "type": "string"
                },
                {
                    "name": "x509-key-password",
                    "type": "string"
                },
                {
                    "name": "x509-key-file",
                    "type": "string"
                },
                {
                    "name": "x509-dir",
                    "type": "string"
                },
                {
                    "name": "sasl",
                    "type": "boolean"
                },
                {
                    "name": "disable-agent-file-xfer",
                    "type": "boolean"
                },
                {
                    "name": "disable-copy-paste",
                    "type": "boolean"
                },
                {
                    "name": "disable-ticketing",
                    "type": "boolean"
                },
                {
                    "name": "password",
                    "type": "string"
                },
                {
                    "name": "ipv6",
                    "type": "boolean"
                },
                {
                    "name": "ipv4",
                    "type": "boolean"
                },
                {
                    "name": "addr",
                    "type": "string"
                },
                {
                    "name": "tls-port",
                    "type": "number"
                },
                {
                    "name": "port",
                    "type": "number"
                }
            ],
            "option": "spice"
        },
        {
            "parameters": [

            ],
            "option": "acpi"
        },
        {
            "parameters": [
                {
                    "name": "sock_fd",
                    "type": "number"
                },
                {
                    "name": "socket",
                    "type": "string"
                },
                {
                    "name": "readonly",
                    "type": "boolean"
                },
                {
                    "name": "writeout",
                    "type": "string"
                },
                {
                    "name": "security_model",
                    "type": "string"
                },
                {
                    "name": "mount_tag",
                    "type": "string"
                },
                {
                    "name": "path",
                    "type": "string"
                },
                {
                    "name": "fsdriver",
                    "type": "string"
                }
            ],
            "option": "virtfs"
        },
        {
            "parameters": [
                {
                    "name": "sock_fd",
                    "type": "number"
                },
                {
                    "name": "socket",
                    "type": "string"
                },
                {
                    "name": "readonly",
                    "type": "boolean"
                },
                {
                    "name": "writeout",
                    "type": "string"
                },
                {
                    "name": "security_model",
                    "type": "string"
                },
                {
                    "name": "path",
                    "type": "string"
                },
                {
                    "name": "fsdriver",
                    "type": "string"
                }
            ],
            "option": "fsdev"
        },
        {
            "parameters": [

            ],
            "option": "smbios"
        },
        {
            "parameters": [
                {
                    "name": "target",
                    "type": "string"
                },
                {
                    "name": "enable",
                    "type": "boolean"
                }
            ],
            "option": "semihosting-config"
        },
        {
            "parameters": [
                {
                    "name": "align",
                    "type": "boolean"
                },
                {
                    "name": "shift",
                    "type": "string"
                }
            ],
            "option": "icount"
        },
        {
            "parameters": [

            ],
            "option": "numa"
        },
        {
            "parameters": [
                {
                    "name": "debug-threads",
                    "help": "When enabled, name the individual threads; defaults off.\nNOTE: The thread names are for debugging and not a\nstable API.",
                    "type": "boolean"
                },
                {
                    "name": "process",
                    "help": "Sets the name of the QEMU process, as shown in top etc",
                    "type": "string"
                },
                {
                    "name": "guest",
                    "help": "Sets the name of the guest.\nThis name will be displayed in the SDL window caption.\nThe name will also be used for the VNC server",
                    "type": "string"
                }
            ],
            "option": "name"
        },
        {
            "parameters": [
                {
                    "name": "timestamp",
                    "type": "boolean"
                }
            ],
            "option": "msg"
        },
        {
            "parameters": [
                {
                    "name": "mlock",
                    "type": "boolean"
                }
            ],
            "option": "realtime"
        },
        {
            "parameters": [

            ],
            "option": "tpmdev"
        },
        {
            "parameters": [

            ],
            "option": "object"
        },
        {
            "parameters": [
                {
                    "name": "opaque",
                    "help": "free-form string used to describe fd",
                    "type": "string"
                },
                {
                    "name": "set",
                    "help": "ID of the fd set to add fd to",
                    "type": "number"
                },
                {
                    "name": "fd",
                    "help": "file descriptor of which a duplicate is added to fd set",
                    "type": "number"
                }
            ],
            "option": "add-fd"
        },
        {
            "parameters": [
                {
                    "name": "enable",
                    "type": "boolean"
                }
            ],
            "option": "sandbox"
        },
        {
            "parameters": [
                {
                    "name": "strict",
                    "type": "boolean"
                },
                {
                    "name": "reboot-timeout",
                    "type": "string"
                },
                {
                    "name": "splash-time",
                    "type": "string"
                },
                {
                    "name": "splash",
                    "type": "string"
                },
                {
                    "name": "menu",
                    "type": "boolean"
                },
                {
                    "name": "once",
                    "type": "string"
                },
                {
                    "name": "order",
                    "type": "string"
                }
            ],
            "option": "boot-opts"
        },
        {
            "parameters": [
                {
                    "name": "maxcpus",
                    "type": "number"
                },
                {
                    "name": "threads",
                    "type": "number"
                },
                {
                    "name": "cores",
                    "type": "number"
                },
                {
                    "name": "sockets",
                    "type": "number"
                },
                {
                    "name": "cpus",
                    "type": "number"
                }
            ],
            "option": "smp-opts"
        },
        {
            "parameters": [
                {
                    "name": "maxmem",
                    "type": "size"
                },
                {
                    "name": "slots",
                    "type": "number"
                },
                {
                    "name": "size",
                    "type": "size"
                }
            ],
            "option": "memory"
        },
        {
            "parameters": [
                {
                    "name": "suppress-vmdesc",
                    "help": "Set on to disable self-describing migration",
                    "type": "boolean"
                },
                {
                    "name": "iommu",
                    "help": "Set on/off to enable/disable Intel IOMMU (VT-d)",
                    "type": "boolean"
                },
                {
                    "name": "firmware",
                    "help": "firmware image",
                    "type": "string"
                },
                {
                    "name": "usb",
                    "help": "Set on/off to enable/disable usb",
                    "type": "boolean"
                },
                {
                    "name": "mem-merge",
                    "help": "enable/disable memory merge support",
                    "type": "boolean"
                },
                {
                    "name": "dump-guest-core",
                    "help": "Include guest memory in  a core dump",
                    "type": "boolean"
                },
                {
                    "name": "dt_compatible",
                    "help": "Overrides the \"compatible\" property of the dt root node",
                    "type": "string"
                },
                {
                    "name": "phandle_start",
                    "help": "The first phandle ID we may generate dynamically",
                    "type": "number"
                },
                {
                    "name": "dumpdtb",
                    "help": "Dump current dtb to a file and quit",
                    "type": "string"
                },
                {
                    "name": "dtb",
                    "help": "Linux kernel device tree file",
                    "type": "string"
                },
                {
                    "name": "append",
                    "help": "Linux kernel command line",
                    "type": "string"
                },
                {
                    "name": "initrd",
                    "help": "Linux initial ramdisk file",
                    "type": "string"
                },
                {
                    "name": "kernel",
                    "help": "Linux kernel image file",
                    "type": "string"
                },
                {
                    "name": "kvm_shadow_mem",
                    "help": "KVM shadow MMU size",
                    "type": "size"
                },
                {
                    "name": "kernel_irqchip",
                    "help": "use KVM in-kernel irqchip",
                    "type": "boolean"
                },
                {
                    "name": "accel",
                    "help": "accelerator list",
                    "type": "string"
                },
                {
                    "name": "type",
                    "help": "emulated machine",
                    "type": "string"
                }
            ],
            "option": "machine"
        },
        {
            "parameters": [
                {
                    "name": "romfile",
                    "type": "string"
                },
                {
                    "name": "bootindex",
                    "type": "number"
                }
            ],
            "option": "option-rom"
        },
        {
            "parameters": [
                {
                    "name": "file",
                    "type": "string"
                },
                {
                    "name": "events",
                    "type": "string"
                }
            ],
            "option": "trace"
        },
        {
            "parameters": [
                {
                    "name": "pretty",
                    "type": "boolean"
                },
                {
                    "name": "default",
                    "type": "boolean"
                },
                {
                    "name": "chardev",
                    "type": "string"
                },
                {
                    "name": "mode",
                    "type": "string"
                }
            ],
            "option": "mon"
        },
        {
            "parameters": [
                {
                    "name": "value",
                    "type": "string"
                },
                {
                    "name": "property",
                    "type": "string"
                },
                {
                    "name": "driver",
                    "type": "string"
                }
            ],
            "option": "global"
        },
        {
            "parameters": [
                {
                    "name": "driftfix",
                    "type": "string"
                },
                {
                    "name": "clock",
                    "type": "string"
                },
                {
                    "name": "base",
                    "type": "string"
                }
            ],
            "option": "rtc"
        },
        {
            "parameters": [

            ],
            "option": "net"
        },
        {
            "parameters": [

            ],
            "option": "netdev"
        },
        {
            "parameters": [

            ],
            "option": "device"
        },
        {
            "parameters": [
                {
                    "name": "chardev",
                    "type": "string"
                },
                {
                    "name": "size",
                    "type": "size"
                },
                {
                    "name": "debug",
                    "type": "number"
                },
                {
                    "name": "name",
                    "type": "string"
                },
                {
                    "name": "signal",
                    "type": "boolean"
                },
                {
                    "name": "mux",
                    "type": "boolean"
                },
                {
                    "name": "rows",
                    "type": "number"
                },
                {
                    "name": "cols",
                    "type": "number"
                },
                {
                    "name": "height",
                    "type": "number"
                },
                {
                    "name": "width",
                    "type": "number"
                },
                {
                    "name": "telnet",
                    "type": "boolean"
                },
                {
                    "name": "reconnect",
                    "type": "number"
                },
                {
                    "name": "delay",
                    "type": "boolean"
                },
                {
                    "name": "server",
                    "type": "boolean"
                },
                {
                    "name": "wait",
                    "type": "boolean"
                },
                {
                    "name": "ipv6",
                    "type": "boolean"
                },
                {
                    "name": "ipv4",
                    "type": "boolean"
                },
                {
                    "name": "to",
                    "type": "number"
                },
                {
                    "name": "localport",
                    "type": "string"
                },
                {
                    "name": "localaddr",
                    "type": "string"
                },
                {
                    "name": "port",
                    "type": "string"
                },
                {
                    "name": "host",
                    "type": "string"
                },
                {
                    "name": "path",
                    "type": "string"
                },
                {
                    "name": "backend",
                    "type": "string"
                }
            ],
            "option": "chardev"
        },
        {
            "parameters": [
                {
                    "name": "copy-on-read",
                    "help": "copy read data from backing file into image file",
                    "type": "boolean"
                },
                {
                    "name": "werror",
                    "help": "write error action",
                    "type": "string"
                },
                {
                    "name": "rerror",
                    "help": "read error action",
                    "type": "string"
                },
                {
                    "name": "read-only",
                    "help": "open drive file as read-only",
                    "type": "boolean"
                },
                {
                    "name": "file",
                    "help": "file name",
                    "type": "string"
                },
                {
                    "name": "serial",
                    "help": "disk serial number",
                    "type": "string"
                },
                {
                    "name": "addr",
                    "help": "pci address (virtio only)",
                    "type": "string"
                },
                {
                    "name": "boot",
                    "help": "(deprecated, ignored)",
                    "type": "boolean"
                },
                {
                    "name": "trans",
                    "help": "chs translation (auto, lba, none)",
                    "type": "string"
                },
                {
                    "name": "secs",
                    "help": "number of sectors (ide disk geometry)",
                    "type": "number"
                },
                {
                    "name": "heads",
                    "help": "number of heads (ide disk geometry)",
                    "type": "number"
                },
                {
                    "name": "cyls",
                    "help": "number of cylinders (ide disk geometry)",
                    "type": "number"
                },
                {
                    "name": "if",
                    "help": "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
                    "type": "string"
                },
                {
                    "name": "media",
                    "help": "media type (disk, cdrom)",
                    "type": "string"
                },
                {
                    "name": "index",
                    "help": "index number",
                    "type": "number"
                },
                {
                    "name": "unit",
                    "help": "unit number (i.e. lun for scsi)",
                    "type": "number"
                },
                {
                    "name": "bus",
                    "help": "bus number",
                    "type": "number"
                },
                {
                    "name": "detect-zeroes",
                    "help": "try to optimize zero writes (off, on, unmap)",
                    "type": "string"
                },
                {
                    "name": "throttling.iops-size",
                    "help": "when limiting by iops max size of an I/O in bytes",
                    "type": "number"
                },
                {
                    "name": "throttling.bps-write-max",
                    "help": "total bytes write burst",
                    "type": "number"
                },
                {
                    "name": "throttling.bps-read-max",
                    "help": "total bytes read burst",
                    "type": "number"
                },
                {
                    "name": "throttling.bps-total-max",
                    "help": "total bytes burst",
                    "type": "number"
                },
                {
                    "name": "throttling.iops-write-max",
                    "help": "I/O operations write burst",
                    "type": "number"
                },
                {
                    "name": "throttling.iops-read-max",
                    "help": "I/O operations read burst",
                    "type": "number"
                },
                {
                    "name": "throttling.iops-total-max",
                    "help": "I/O operations burst",
                    "type": "number"
                },
                {
                    "name": "throttling.bps-write",
                    "help": "limit write bytes per second",
                    "type": "number"
                },
                {
                    "name": "throttling.bps-read",
                    "help": "limit read bytes per second",
                    "type": "number"
                },
                {
                    "name": "throttling.bps-total",
                    "help": "limit total bytes per second",
                    "type": "number"
                },
                {
                    "name": "throttling.iops-write",
                    "help": "limit write operations per second",
                    "type": "number"
                },
                {
                    "name": "throttling.iops-read",
                    "help": "limit read operations per second",
                    "type": "number"
                },
                {
                    "name": "throttling.iops-total",
                    "help": "limit total I/O operations per second",
                    "type": "number"
                },
                {
                    "name": "werror",
                    "help": "write error action",
                    "type": "string"
                },
                {
                    "name": "format",
                    "help": "disk format (raw, qcow2, ...)",
                    "type": "string"
                },
                {
                    "name": "aio",
                    "help": "host AIO implementation (threads, native)",
                    "type": "string"
                },
                {
                    "name": "cache.no-flush",
                    "help": "ignore any flush requests for the device",
                    "type": "boolean"
                },
                {
                    "name": "cache.direct",
                    "help": "enables use of O_DIRECT (bypass the host page cache)",
                    "type": "boolean"
                },
                {
                    "name": "cache.writeback",
                    "help": "enables writeback mode for any caches",
                    "type": "boolean"
                },
                {
                    "name": "discard",
                    "help": "discard operation (ignore/off, unmap/on)",
                    "type": "string"
                },
                {
                    "name": "snapshot",
                    "help": "enable/disable snapshot mode",
                    "type": "boolean"
                }
            ],
            "option": "drive"
        }
    ],
    "id": "libvirt-12"
}