Re: KVM on IBM PowerEN processor

[Kun Wang <kun.kwang@gmail.com>]

于 2011-8-30 22:15, Stuart Yoder 写道:
> On Tue, Aug 30, 2011 at 4:45 AM, Alexander Graf<agraf@suse.de>  wrote:
>> Hi Kun,
>>
>> On 08/29/2011 11:31 AM, Kun Wang wrote:
>>> Hi, everyone,
>>>
>>> This is Kun Wang from IBM Research China. I and my team have been working
>>> on IBM PowerEN processor in recent years, including its simulation,
>>> lib/runtime optimization and etc. Now we start the work to enable KVM on
>>> PowerEN processor. Since the A2 core of PowerEN follows Power ISA v2.06
>>> (more specifically, book3e and 64-bit), I believe 99% of our work will
>>> stick to the ISA, and hence can be leveraged by others.
>>>
>>> As the new one to this KVM world, I and my team definitely need your help.
>>> Looking forward to talking and working with you guys in the future.
>> Welcome to the PowerPC KVM world! I'm looking very much forward to working
>> with you there. Please always CC kvm@vger.kernel.org for emails you send to
>> kvm-ppc@vger, unless you think of it as completely off-generic-kvm
>> discussions. I like the idea of having more clever people involved in the
>> PPC KVM process and by CC'ing kvm@vger, we get more exposure.
>>
>> The Freescale e500 cores are basically BookE 2.06 compliant with a few
>> specialties here and there. Have you looked at their code? Sure, it's 32-bit
>> as is now but there is definitely work going on at Freescale to get it
>> 64-bit too.
>>
>> Maybe it makes sense to take the current code as a starting point and slowly
>> move towards an architecture that is more generic. Maybe it makes sense to
>> start from scratch and actually design something flexible that splits guest
>> and host TLB code, so we could potentially run cross-book KVM in the future
>> (which I would love to see happen! Just imagine running a PowerEN guest on a
>> POWER7 system).
>>
>> Either way, please make sure to coordinate any efforts with me and Scott so
>> we don't walk off in different directions and only get to realize we went
>> down the wrong path when there's already a 100 patches patch set on the
>> mailing list :)
> Also, note--  we (Freescale) do have a patchset coming soon for the e500mc
> which is a 2.06 embedded 32-bit CPU with category E.HV.    We've had this
> running for a while and are close to finishing some cleanup before posting
> upstream.  We are are also starting to look at 64-bit support for our e5500
> CPU we should be a delta on top of the e500mc support.
>
> Just want to make you aware of some current work that may overlap your
> A2 KVM support...
>
> Stuart
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Stuart,

Thank you very much for your information. That's really helpful to us. I 
do think there is some overlap between your work and ours. Do you have 
any suggestions for us to avoid "re-inventing the wheel"?

Best regards,
Kun Wang