From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: XSAVE save/restore shortcomings
Date: Fri, 06 Sep 2013 17:03:08 +0200
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To: "H. Peter Anvin" <hpa@linux.intel.com>
Cc: KeirFraser <keir@xen.org>, "Nakajima, Jun" <jun.nakajima@intel.com>, "Dugger, Donald D" <donald.d.dugger@intel.com>, Jan Beulich <JBeulich@suse.com>, "Zhang, Yang Z" <yang.z.zhang@intel.com>, xen-devel <xen-devel@lists.xenproject.org>
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Il 06/09/2013 16:44, H. Peter Anvin ha scritto:
> On 09/06/2013 04:57 AM, Paolo Bonzini wrote:
>> [adding H. Peter Anvin... the context is whether the layout of the
>> XSAVE/XRSTOR area is fixed, including the offset of each separate
>> Ext_SAVE_Area].
> 
> It is.
> 
>> So please Intel, pretty please do not modify the XSAVE offsets, and
>> clarify this as soon as possible.
> 
> They will not change.

Great, could Intel document the offsets of the MPX save areas too?  It's
somewhat useful to know them in advance, if one wants to read and set
BNDCFGU and BNDSTATUS.

Paolo