$ qemu-system-x86_64 -machine help
Supported machines are:
pc-0.13 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.0 Standard PC (i440FX + PIIX, 1996)
pc-1.0-qemu-kvm Standard PC (i440FX + PIIX, 1996) (alias of pc-1.0)
pc-1.0 Standard PC (i440FX + PIIX, 1996)
pc-q35-1.7 Standard PC (Q35 + ICH9, 2009)
pc-1.1 Standard PC (i440FX + PIIX, 1996)
q35 Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-2.0)
pc-q35-2.0 Standard PC (Q35 + ICH9, 2009)
pc-i440fx-1.4 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.5 Standard PC (i440FX + PIIX, 1996)
pc-0.14 Standard PC (i440FX + PIIX, 1996)
pc-0.15 Standard PC (i440FX + PIIX, 1996)
xenfv Xen Fully-virtualized PC
pc-q35-1.4 Standard PC (Q35 + ICH9, 2009)
isapc ISA-only PC
pc-0.10 Standard PC (i440FX + PIIX, 1996)
pc Ubuntu 14.04 PC (i440FX + PIIX, 1996) (alias of pc-i440fx-trusty)
pc-i440fx-trusty Ubuntu 14.04 PC (i440FX + PIIX, 1996) (default)
pc-1.2 Standard PC (i440FX + PIIX, 1996)
pc-0.11 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.7 Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.5-saucy Standard PC (i440FX + PIIX, 1996) (alias of pc-i440fx-1.5-qemu-kvm)
pc-i440fx-1.5-qemu-kvm Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.6 Standard PC (i440FX + PIIX, 1996)
none empty machine
xenpv Xen Para-virtualized PC
pc-q35-1.5 Standard PC (Q35 + ICH9, 2009)
pc-1.0-precise Standard PC (i440FX + PIIX, 1996) (alias of pc-1.0-qemu-kvm)
pc-1.0-qemu-kvm Standard PC (i440FX + PIIX, 1996)
pc-q35-1.6 Standard PC (Q35 + ICH9, 2009)
pc-0.12 Standard PC (i440FX + PIIX, 1996)
pc-1.3 Standard PC (i440FX + PIIX, 1996)
centos 7.1 supported machine:
/usr/libexec/qemu-kvm -machine help
Supported machines are:
none empty machine
pc RHEL 7.0.0 PC (i440FX + PIIX, 1996) (alias of pc-i440fx-rhel7.0.0)
pc-i440fx-rhel7.0.0 RHEL 7.0.0 PC (i440FX + PIIX, 1996) (default)
rhel6.5.0 RHEL 6.5.0 PC
rhel6.4.0 RHEL 6.4.0 PC
rhel6.3.0 RHEL 6.3.0 PC
rhel6.2.0 RHEL 6.2.0 PC
rhel6.1.0 RHEL 6.1.0 PC
rhel6.0.0 RHEL 6.0.0 PC