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Re: [Xen-devel] bi-modal backends - fronend mode detection


  • To: Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Fri, 03 Nov 2006 20:43:09 +0000
  • Delivery-date: Fri, 03 Nov 2006 12:43:51 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acb/iKvS6iqtbGt7EduUiwAX8io7RQ==
  • Thread-topic: [Xen-devel] bi-modal backends - fronend mode detection

On 3/11/06 15:16, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> Does anyone have a good suggestion how to have the backends (for
> which I just created bi-modal functionality, so they can [on x86 for
> now] support both 32-bit and 64-bit domUs) learn the mode of the
> connecting frontends.
> 
> (Backends using blkif and tpmif need this, pci and networking seem
> to be unaffected.)

Maybe using a new hypercall makes sense, to discover what Xen thinks is the
mode of VCPU0. We'll need something similar for HVM guests in the long term,
so making the decision at domain-build time doesn't really work.

 -- Keir



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