[Xen-devel] Status of auto_translated_mode

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

Hi, Keir,
        Per agreement on last xen summit, now xen/ia64 community is
working on 
moving dom0 from current p==m model to p!=m model. First an easy way is
chosen 
by Isaku that physmap is invisible to dom0 which is instead managed by
Xen. 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? 

2. Is auto_translated_mode only used for domU? Seems this model can't
apply to 
modified DMA interface since mfn is required to manipulate physical
devices.

3. Does anyone exercise this mode recently? Is this logic working or
broken?

        We'd like to know which areas need to be enhanced if this
translated mode can 
be applied to dom0. That would save people much time since virtual
drivers together 
with grant table have been tuned to accommodate this mode. Then this
translated 
mode may be made more generic. :-)

Thanks,
Kevin

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