[SeaBIOS] Alt SeaBIOS SSDT cpu hotplug

Liu, Jinsong jinsong.liu at intel.com
Fri Jul 30 19:22:59 CEST 2010

Liu, Jinsong wrote:
> Kevin O'Connor wrote:
>> On Sat, Jul 10, 2010 at 12:41:18AM +0800, Liu, Jinsong wrote:
>>> Kevin O'Connor wrote:
>>>> On Thu, Jul 08, 2010 at 09:19:13PM +0800, Liu, Jinsong wrote:
>>>>> Avi Kivity wrote:
>>>>>> Very nice.  I thought about doing this but abandoned it as
>>>>>> unmaintainable.  Using external functions and the ID variable,
>>>>>> however, reduces the mess to tolerable proportions, and gains us
>>>>>> a lot of flexibility.  We can now have any combinations of
>>>>>> sockets and installed cpus.
>>>>> Agree, only 1 concern
>>>>> will it bring debugable/ scalable issue by hardcode aml code?
>>>> I've updated the patch (see below).  This version documents how one
>>>> can build a new version of the Processor() ssdt snippet.
>>>> I've tested this under linux - there were a few bugs in the
>>>> previous patch.  I also had to replace the dynamically created
>>>> CPUS array with a dynamically created NTFY method - which is a bit
>>>> more complicated.
>>> Yeah, thanks Kevin.
>>> After you done patch and draft test, our QA may do nightly test.
>> Hi Jinsong,
>> Have you had any feedback from tests?
>> Thanks,
>> -Kevin
> Oh, I misunderstand.
> I originally thought our QA will test after your patch send to
> upstream, so we wait for it :) 
> I will talk with our QA this week to arrange test for it.
> Thanks,
> Jinsong


We have done test for your patch, result are:
1. For linux 2.6.32 hvm guest, it works OK, for both vcpu add and vcpu remove, and re-add, re-remove, ...
2. For Window 2008 DataCenter hvm guest, it BSOD every time, QA feedback below:
[QA] We test it as following:
1 copy bios.bin to /usr/local/share/qemu/
 (BTW, we also test as your method , copy bios.bin to qemu-kvm/pc-bios, then at qemu-kvm ./configure make && make install)
2 create qemu img for Windows 2008 Datacenter
 qemu-img  create -b /share/xvs/img/Windows/ia32e_win2k8_datacenter.img  -f qow2 test.img
3 create guest
 qemu-system-x86_64  -hda test.img  -m 1024 -smp 2,maxvcpus=16
4 blueScreen

BTW, attached is the latest patch I received from you.
Do you have updated version?

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Subject: Re: Alt SeaBIOS SSDT cpu hotplug
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