Re: [libvirt] Modern CPU models cannot be used with libvirt
On Thu, Dec 15, 2011 at 03:54:15PM +0100, Jiri Denemark wrote:
Hi,
Recently I realized that all modern CPU models defined in
/etc/qemu/target-x86_64.conf are useless when qemu is used through libvirt.
That's because we start qemu with -nodefconfig which results in qemu ignoring
that file with CPU model definitions. We have a very good reason for using
-nodefconfig because we need to control the ABI presented to a guest OS and we
don't want any configuration file that can contain lots of things including
device definitions to be read by qemu. However, we would really like the new
CPU models to be understood by qemu even if used through libvirt. What would
be the best way to solve this?
Ideally libvirt would just write out a config file with the CPU
that was configured in libvirt and pass -readconfig /var/lib/libvirt/qemu/guestcpu.conf
That way libvirt can configure CPU models without regard for
what the particular QEMU version might have in its config.
Daniel
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