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[Xen-devel] Re: [PATCH] FPU LWP 5/8: add a mask option to xsave() and xr

To: "Wei Huang" <wei.huang2@xxxxxxx>
Subject: [Xen-devel] Re: [PATCH] FPU LWP 5/8: add a mask option to xsave() and xrstor()
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Thu, 05 May 2011 08:09:24 +0100
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, KeirFraser <keir@xxxxxxx>
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>>> On 04.05.11 at 18:03, Wei Huang <wei.huang2@xxxxxxx> wrote:
> Hi Jan,
> 
> That is a good point. So far there isn't a way to decide which bits are 
> guarded by CR0.TS. I will bring it up to our design team. I guess LWP 
> will the only exception for a long while. Is the first approach 
> sufficient/acceptable to you for now?
> 
> #define XSTATE_LAZY (XSTATE_ALL & ~XSTATE_NONLAZY)

Yes.

Jan


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