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Date: Mon, 23 Aug 2010 13:29:17 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: [Qemu-devel] Re: [PATCH v2 0/7] APIC/IOAPIC cleanup
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To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: "Liu @mail.corp.redhat.com>> \"Liu, Jinsong\"" <jinsong.liu@intel.com>, Markus Armbruster <armbru@redhat.com>, qemu-devel <qemu-devel@nongnu.org>, Blue Swirl <blauwirbel@gmail.com>, Avi Kivity <avi@redhat.com>, Paul Brook <paul@codesourcery.com>

On 08/23/2010 01:24 PM, Jan Kiszka wrote:
> Anthony Liguori wrote:
>    
>> On 08/23/2010 10:10 AM, Markus Armbruster wrote:
>>      
>>> You lost me.  A few messages upthread.
>>>
>>> What's the *practical* problem again?
>>>
>>>        
>> CPU hotplug adds a local APIC to Sysbus but Sysbus does not allow hot plug.
>>
>> I believe the right short term way to fix this is to take the local APIC
>> off of Sysbus.  The right long term fix is to not make the local APIC a
>> qdev device and instead fold it into CPUX86State.
>>      
> This pushes the issue to the CPU. I'm convinced CPUs should become qdevs
> as well, so we need a hotplug-capable bus anyway.
>    

For the CPU, yes.  That implies making a CPUBus and making it hot pluggable.

Regards,

Anthony Liguori

> Jan
>
>