[SeaBIOS] [PATCH] vcpu hotplug: Setup vcpu add/remove infrastructure

Liu, Jinsong jinsong.liu at intel.com
Fri Jan 29 17:52:54 CET 2010

Gleb Natapov wrote:
> On Fri, Jan 29, 2010 at 11:34:24PM +0800, Liu, Jinsong wrote:
>> Gleb Natapov wrote:
>>> On Thu, Jan 28, 2010 at 10:54:48PM +0800, Liu, Jinsong wrote:
>>>> Connor and Gleb,
>>>> I updated my patch according to our discussion:
>>>> 1. simplify scan loop according to 'maxvcpus';
>>>> 2. remove unecessary global variables;
>>>> 3. change hardcode address to bios use only area '0x514';
>>>> 4. remove simple \_PR scope from ssdt;
>>> I still don't see that ACPI NVS issue is addressed.
>> Gleb,
>> I'm not quite sure Win7 BSOD issue you mentioned last email, anyway
>> I update my patch, define ACPI NVS per my understanding. 
> You need checked build of Windows 7. This is not regular Win7 this is
> debug version that you can download from MSDN. Here is the bug report
> about the crash:
> http://sourceforge.net/tracker/?func=detail&aid=2902983&group_id=180599&atid=893831
> Anyway according to ACPI spec ACPI DATA area can be reused by an OS
> after reading ACPI tables so it is wrong to access this memory after
> an OS boot. 

Yes, it's safer to define ACPI NVS, although it's bios use only area.

>> After test, Win7 guest works fine based on it.
>> If anything misunderstanding, you can update my patch per your
>> experience. 
>> Attached are the patches,
>> vcpu_hotplug_1.pach is same as my last email sent yesterday;
>> vcpu_hotplug_2.patch is to define ACPI NVS;
>> Thanks,
>> Jinsong

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