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Re: [Xen-devel] [PATCH RFC 2/4] x86/dom0: prevent PVH Dom0 from mapping read-only the IO APIC area

To: <roger.pau@xxxxxxxxxx>
From: "Jan Beulich" <jbeulich@xxxxxxxx>
Date: Fri, 30 Jun 2017 05:31:36 -0600
Cc: andrew.cooper3@xxxxxxxxxx, boris.ostrovsky@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 30 Jun 2017 11:31:44 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

>>> Roger Pau Monne <roger.pau@xxxxxxxxxx> 04/24/17 1:52 PM >>>
>This is emulated by Xen and must not be mapped into PVH Dom0 p2m.

Yes, but this reminds of of the reason we permit the r/o mapping in PV
Dom0, and I wonder how well the emulated variant is going to work with
ACPI methods accessing the IO-APICs. Let's hope there's not going to
be any problems.

Jan


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