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RE: [Xen-devel] Status of auto_translated_mode

To: "Jesper Kristensen" <cableman@xxxxxxxxx>, "xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Status of auto_translated_mode
From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Date: Tue, 28 Mar 2006 22:06:32 +0800
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Thread-topic: [Xen-devel] Status of auto_translated_mode
>From: Jesper Kristensen
>Sent: 2006年3月28日 22:02
>Ian Pratt wrote:
>
>>>After some investigation, we found that existing
>>>auto_translated_mode matches our model and then would like to
>>>know the status of this mode on xen/x86.
>>>
>>>1. First a background question, what's the major usage model
>>>for auto_translated_mode?
>>>
>>>
>>
>>Currently, the main usage model is to support guests that haven't got
>>fully paravirtualied mm systems. It's also useful for a number of
>>research projects, such as vm fork, determinsitic replay etc.
>>
>>
>>
>A quick question: Can this be enabled on a per domU basis and how is
>this done correctly? The furthest I can track it is in
>tools/libxc/xc_linux_build.c
>
>    shadow_mode_enabled =
>test_feature_bit(XENFEAT_auto_translated_physmap,
>required_features);
>
>one could of course for now hardcode shadow_mode_enabled to 1, but it
>sounds like there would be a config file option for this kind of thing.
>I can not seem to backtrack this any further. So my question is this:
>how do I enable translated shadow mode as cleanly as possible?
>
>Best Regards,
>Jesper Kristensen

You can add a "features=" in your config file, which will be parsed and 
then passed to xc_linux_build.

Thanks,
Kevin

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