это кстати от гипервизора зависит, посмотреть все досутные можно через qemu:
# qemu-system-x86_64 --machine help
Supported machines are:
pc-i440fx-2.9 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.8 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.7 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.6 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.5 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.4 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.3 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.2 Standard PC (i440FX + PIIX, 1996)
pc Standard PC (i440FX + PIIX, 1996) (alias of pc-i440fx-2.11)
pc-i440fx-2.11 Standard PC (i440FX + PIIX, 1996) (default)
pc-i440fx-2.10 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.1 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.0 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.7 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.6 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.5 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.4 Standard PC (i440FX + PIIX, 1996)
pc-1.3 Standard PC (i440FX + PIIX, 1996)
pc-1.2 Standard PC (i440FX + PIIX, 1996)
pc-1.1 Standard PC (i440FX + PIIX, 1996)
pc-1.0 Standard PC (i440FX + PIIX, 1996)
pc-0.15 Standard PC (i440FX + PIIX, 1996)
pc-0.14 Standard PC (i440FX + PIIX, 1996)
pc-0.13 Standard PC (i440FX + PIIX, 1996)
pc-0.12 Standard PC (i440FX + PIIX, 1996)
pc-0.11 Standard PC (i440FX + PIIX, 1996)
pc-0.10 Standard PC (i440FX + PIIX, 1996)
pc-q35-2.9 Standard PC (Q35 + ICH9, 2009)
pc-q35-2.8 Standard PC (Q35 + ICH9, 2009)
pc-q35-2.7 Standard PC (Q35 + ICH9, 2009)
pc-q35-2.6 Standard PC (Q35 + ICH9, 2009)
pc-q35-2.5 Standard PC (Q35 + ICH9, 2009)
pc-q35-2.4 Standard PC (Q35 + ICH9, 2009)
q35 Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-2.11)
pc-q35-2.11 Standard PC (Q35 + ICH9, 2009)
pc-q35-2.10 Standard PC (Q35 + ICH9, 2009)
isapc ISA-only PC
none empty machine