[root@localhost vm]# /usr/libexec/qemu-kvm -M ?
Supported machines are:
pc RHEL 7.4.0 PC (i440FX + PIIX, 1996) (alias of pc-i440fx-rhel7.4.0)
pc-i440fx-rhel7.4.0 RHEL 7.4.0 PC (i440FX + PIIX, 1996) (default)
pc-i440fx-rhel7.3.0 RHEL 7.3.0 PC (i440FX + PIIX, 1996)
pc-i440fx-rhel7.2.0 RHEL 7.2.0 PC (i440FX + PIIX, 1996)
pc-i440fx-rhel7.1.0 RHEL 7.1.0 PC (i440FX + PIIX, 1996)
pc-i440fx-rhel7.0.0 RHEL 7.0.0 PC (i440FX + PIIX, 1996)
rhel6.6.0 RHEL 6.6.0 PC
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
q35 RHEL-7.4.0 PC (Q35 + ICH9, 2009) (alias of pc-q35-rhel7.4.0)
pc-q35-rhel7.4.0 RHEL-7.4.0 PC (Q35 + ICH9, 2009)
pc-q35-rhel7.3.0 RHEL-7.3.0 PC (Q35 + ICH9, 2009)
none empty machine