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From Simon Weller <>
Subject Re: Enabling Virtio for Windows guests on KVM
Date Mon, 14 Jan 2013 13:07:15 GMT

We ran into this a few months ago and didn't want to use the 'Other PV' option either, so
I created a couple of really simple patches to provide a Windows 2008 R2 Virtio OS template.
You can apply these these on top of the 4.0 source, and then recompile the rpms or debs. 

Patches are attached. 

- Si 

----- Original Message -----

From: "Chris Sears" <> 
Sent: Sunday, January 13, 2013 8:58:28 PM 
Subject: Enabling Virtio for Windows guests on KVM 


A question came up a couple days ago on the users list about provisioning 
Windows VMs with Virtio enabled on KVM: 

The workaround mentioned was to set the OS Type to "Other PV". This seems 
non-optimal. Is there a better solution? Or is this a bug/enhancement? 

Looking around at the source, isGuestPVEnabled() seems to have a hard coded 
list of guest OS which will get virtio provisioned by default. No Windows 
OS's are in the list, presumably because the virtio drivers don't ship 
natively with Windows. Is there some other way to control what type of 
virtual NIC and disk controller hardware gets provisioned on a per-VM or 
per-template basis? 


- Chris 

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