[CentOS-virt] Differences between pc and q35

Fri Dec 11 08:01:36 UTC 2015
C.L. Martinez <carlopmart at gmail.com>

On 12/11/2015 07:14 AM, C.L. Martinez wrote:
> Hi all,
>
>   What are the differences between pc and q35?? By default,
> virt-manager+libvirt setups kvm guest machine as a pc-i440fx-rhel7.1.0.
>
> [hicheck at ckvm015 ~]$ /usr/libexec/qemu-kvm -machine ?
> Supported machines are:
> pc                   RHEL 7.1.0 PC (i440FX + PIIX, 1996) (alias of
> pc-i440fx-rhel7.1.0)
> pc-i440fx-rhel7.1.0  RHEL 7.1.0 PC (i440FX + PIIX, 1996) (default)
> 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-7.1.0 PC (Q35 + ICH9, 2009) (alias of
> pc-q35-rhel7.1.0)
> pc-q35-rhel7.1.0     RHEL-7.1.0 PC (Q35 + ICH9, 2009)
> pc-q35-rhel7.0.0     RHEL-7.0.0 PC (Q35 + ICH9, 2009)
> none                 empty machine
>
> But according to this, q35 is more new virtual hardware. Why??

Ok, found it:

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.0_Release_Notes/chap-Red_Hat_Enterprise_Linux-7.0_Release_Notes-Virtualization.html