Re: Status of auto_translated_mode

[Jesper Kristensen <cableman@cs.aau.dk>]

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