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Re: [Xen-devel] Ubuntu 11.04 (amd64 and i386) under Xen as PV on HVM guests don't load the PV drivers.

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Tue, 27 Mar 2012 15:45:56 +0100
Cc: Mike McClurg <mike.mcclurg@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "stefan.bader@xxxxxxxxxxxxx" <stefan.bader@xxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
Delivery-date: Tue, 27 Mar 2012 14:46:11 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On Mon, 2012-03-26 at 21:59 +0100, Konrad Rzeszutek Wilk wrote:
> And found out that the i386 does not have PAE built in, so the whole Xen
> subsystem is turned off (oops) - that actually looks like a bug b/c I think
> the PV drivers in HVM mode ought to work in non-PAE mode..

It is possible in theory for them to work but in practice
CONFIG_XEN_PVHVM is rather entangled with CONFIG_XEN (which depends on
PAE). It's mostly a case of refactoring + getting the ifdeffery right,
fiddly but doable.

Ian.

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References:
- [Xen-devel] Ubuntu 11.04 (amd64 and i386) under Xen as PV on HVM guests don't load the PV drivers.
  - From: Konrad Rzeszutek Wilk

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