On Tue, Jan 13, 2009 at 11:27:07AM +0200, Avi Kivity wrote:
> Amit Shah wrote:
>> CPUID functions 4, 0xb and 0xd behave differently for different values of 
>> ECX.
>> Store these values if userspace passes them.
>>   
>
> Userspace has no way of knowing whether the kernel contains this fix or not.
>
> Use the SET_CPUID2 interface instead.

OK; So first attempt to use the SET_CPUID2 interface. If that fails (new
userspace on older kernel), what should we do?

Amit
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