Re: [RFC] x86: xsave/xrstor support, ucontext_t extensions

From: Chris Wright
Date: Thu May 22 2008 - 17:34:18 EST

* H. Peter Anvin (hpa@xxxxxxxxx) wrote:
> Suresh Siddha wrote:
>> hpa, What is the virtualization problem? Are you referring to perf problem?
>> As you noted, regular non-rt signal handlers won't need this cpuid check. It's
>> needed only for those who manually look at non-rt signal frames and interpret it.
>> And also, they can do this check only once and not everytime.
> No, relying on CPUID and vdso both have implications for virtualization.

hmm, what implications? cpuid is dealt with already.
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