Re: [PATCH 3/3] Eliminate read_cr3 on TLB flush

Avi Kivity
2007-05-31T07:50:39Z

Anthony Liguori wrote:
>>>
>>>
>> For KVM, it should be okay as well. But we can replace two CR4 accesses
>> with just one hypercall.
>>
>>
>
> I was thinking the same thing :-)
>
> I was actually thinking about adding a hypercall to set/clear a bit in a
> control register. The thought here is that it would be useful not just
> for the global bit but also for CR0.TS although we would need another
> paravirt_op hook for stts.
>

Are global tlb flushes frequent enough to warrant optimization?

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