svn commit: r238755 - head/sys/x86/x86

Peter Grehan grehan at freebsd.org
Fri Jul 27 15:21:34 UTC 2012


>>   CPUID causes an unconditional exit in VT-x/SVM so it would be best to
>> avoid that if possible.
>
> The only place where the use of CPUID in tsc patch seems to be reasonable
> is at the SMP test, since it is too much burden to check SSE2/Intel/AMD
> nuances at the boot time, to be redone later anyway. Would it be a serious
> issue for monitors to get several thousands of CPUID traps at boot only ?

  The SMP tsc test is skipped for VM guests so it should be fine there.

later,

Peter.


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