Re: Status of SMP?

Nakajima, Jun
2007-03-14T21:09:17Z

Avi Kivity wrote:
> Gregory Haskins wrote:
>> Hi all,
>> So what is the status of SMP support and is someone working on
>> this? I have some ideas about how to implement this and can spend
>> some time with it if it would be helpful. I just dont want to
>> duplicate efforts.
>>
>
> SMP is planned, though of course help is appreciated. I'd like to
> start on an NPT capable processor so that there's no need to worry
> about the mmu and bootstrap/ipi simultaneously.
>
> If you have ideas, please share them!

The key is the virtual MMU; getting bootstrap/IPI working is
straightforward. Without NPT or EPT, we need to have an SMP-capable
shadow pagetable code. I think one of the most efficient ways is to
re-use the code from Xen. The current one is the third generation of the
shadow page table, and it works well.

Jun
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Intel Open Source Technology Center