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Re: [Xen-devel] [PATCH] xen: mask XSAVE in cpuid since we don't allowguests to use it

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Mon, 09 Mar 2009 09:40:45 -0700
Cc: Boris Derzhavets <bderzhavets@xxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Marc - A. Dahlhaus \[ Administration | Westermann GmbH \]" <mad@xxxxxx>
Delivery-date: Mon, 09 Mar 2009 09:41:09 -0700
List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Keir Fraser wrote:

It seems reasonable to mask XSAVE for now though. I don't think it can
usefully be used without some Xen support.

You mean Xen support to deal with a new CPU context structure, orsomething requiring specific guest code, like what's needed to supportsysenter/syscall?


   J

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