Re: [libvirt] [PATCH 2/3 v4] [UPDATED] PowerPC : Add support for launching VMs in 'compat' mode.

Apologies, I accidentally posted the older version. Pls ignore the previously posted patch 2/3. The updated patch is here : >From a98d6787dc4f1d39ae36d78799ecf36018377ec7 Mon Sep 17 00:00:00 2001 From: Prerna Saxena <prerna(a)linux.vnet.ibm.com&gt; Date: Tue, 28 Oct 2014 15:05:59 +0530 Subject: [PATCH 2/3] PowerPC : Add support for launching VMs in 'compat' mode. PowerISA allows processors to run VMs in binary compatibility ("compat") mode supporting an older version of ISA. QEMU has recently added support to explicitly denote a VM running in compatibility mode through commit 6d9412ea & 8dfa3a5e85. Now, a "compat" mode VM can be run by invoking this qemu commandline on a POWER8 host: -cpu host,compat=power7. This patch allows libvirt to extend the "fallback" semantics of cpu model to describe this new mode for PowerKVM guests. As an example: When a user wants to request a power7 vm to run in compatibility mode on a Power8 host, this can be described in XML as follows : <cpu mode='host-model' match='exact'> <model fallback='compat'>power7</model>