Re: [Xen-devel] Question about implementation of 32-bit guests o

To:	"Vessey, Bruce A" <Bruce.Vessey@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] Question about implementation of 32-bit guests on 64-bit hypervisor (IDT-related)
From:	Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date:	Fri, 07 Dec 2007 14:14:46 +0000
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On 7/12/07 14:05, "Vessey, Bruce A" <Bruce.Vessey@xxxxxxxxxx> wrote:

> (1)  Which approach does Xen use?  Is it one of the above, or yet
> something else?

32-bit PV guests are run in compatibility mode. 32-bit HVM guests are run in
legacy mode, inside a VMX or SVM container.

> (2)  What are the configuration restrictions, if any, for running 32-bit
> guests on top of the 64-bit hypervisor?

32-bit PV guests are restricted to using the low 128GB of physical memory.
There's not even that restriction for 32-bit HVM guests.

 -- Keir

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Re: [Xen-devel] Question about implementation of 32-bit guests on 64-bit