Re: [PATCH 0/15] x86/xsaves: Optimize xstate context switch by xsaves/xrstors

[H. Peter Anvin]

On 05/26/2014 01:13 PM, Yu, Fenghua wrote:
> 
> So I don't see we need xsaves/xrstors in user space. But I could be
> wrong.
> 

XSAVES/XRSTORS are privileged.  The user-space equivalents are
XSAVEC/XRSTOR.

	-hpa


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