From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: [PATCH 0/4] XSAVE/XRSTOR fixes and enhancements
Date: Tue, 31 Aug 2010 08:41:30 +0100
Message-ID: <C8A270BA.2162C%keir.fraser@eu.citrix.com>
References: <4C7CB0AE.6050908@intel.com>
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To: Weidong Han <weidong.han@intel.com>
Cc: Tim Deegan <Tim.Deegan@eu.citrix.com>, Jeremy Fitzhardinge <jeremy@goop.org>, Xen-devel <xen-devel@lists.xensource.com>
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On 31/08/2010 08:35, "Weidong Han" <weidong.han@intel.com> wrote:

>> Breaks backward compatibility by changing size of vcpu_guest_context (part
>> of the PV guest ABI). Totally unacceptable -- is this a nasty attempt to get
>>   
> yes, it cannot restore guest saved by old Xen. do you mean we should not
> change size of vcpu_guest_context in future?

Yes, and it's not just a save/restore issue. The PV guest itself handles
vcpu_guest_context when booting secondary vcpus (via VCPUOP_initialise). The
structure layout/size is set in stone.

 -- Keir