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[Xen-devel] RE: One question for CPUID for PV guest

To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, <jean.guyader@xxxxxxxxxxxxx>
Subject: [Xen-devel] RE: One question for CPUID for PV guest
From: "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>
Date: Wed, 28 May 2008 16:02:08 +0800
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Ke, Liping" <liping.ke@xxxxxxxxx>
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Thread-topic: One question for CPUID for PV guest
Got it. Thanks for your clarification.

-- Yunhong Jiang

Keir Fraser <mailto:keir.fraser@xxxxxxxxxxxxx> wrote:
> We'd have to keep a default policy at least for dom0 hardcoded in Xen.
> 
> -- Xen
> 
> On 28/5/08 08:52, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:
> 
>> So how about dom0? Does that mean we need different handler for
dom0/PV
>> guest in emulate_forced_invalid_op()?
>> 
>> -- Yunhong Jiang
>> 
>> 
>> Keir Fraser <mailto:keir.fraser@xxxxxxxxxxxxx> wrote:
>>> There's no reason not to make PV CPUID similarly configurable.
>>> 
>>> -- Keir
>>> 
>>> On 28/5/08 08:19, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:
>>> 
>>>> Keir/Jean, I have one question for changeset 17524 "Guest CPUID
>>>> configuration" (The URL is 
>>>> 
>>> 
>> 
>
http://xenbits.xensource.com/staging/xen-unstable.hg?rev/18727843db60).
>>>> This changeset  do CPUID caculation in libxc. My question is, why
don't
>>>> we have such support for PV guest? Currently PV guest's CPUID
>>>> virtualization is hardcoded in emulate_forced_invalid_op(), is it
>>>> possible to do things like hvm domain?
>>>> 
>>>> Thanks
>>>> Yunhong Jiang

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