But there are only few examples of such options without explicit list. After some googling in bing and duckduckgo I gave up and decided to create my own.
Simple one-liner to find all strings starting with 'hw_' in Nova repo:
$ egrep [\'\"]hw_[a-zA-Z_0-9]+[\'\"] -rho |sed s/[\"\']//g|sort -u
Here are results for Juno:
- hw_cdrom_bus
- hw_cpu_cores
- hw_cpu_max_cores
- hw_cpu_max_sockets
- hw_cpu_max_threads
- hw_cpu_sockets
- hw_cpu_threads
- hw_disk_bus
- hw_disk_discard
- hw_machine_type
- hw_numa_nodes
- hw_qemu_guest_agent
- hw_rng_model
- hw_scsi_model
- hw_serial_port_count
- hw_veb
- hw_video_model
- hw_video_ram
- hw_vif_model
- hw_watchdog_action
