Re: [Xen-devel] [PATCH RFC v2 6/9] xen/arm: Add handling write fault for dirty-page tracing

[Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx>]

> > I think we'd want to establish a linear map of the current guest p2m
> > for these purposes so we could also avoid all the map_domain_page
> > stuff in the fault path. I think there is enough virtual address space
> > left for that even on 32-bit, it's less critical on 64-bit anyway
> > since we are about to have a direct map of RAM available to us.
> 
> I think it is a good idea to have an ever-mapping linear dirty-bit map for
> guest p2m. Maybe between fixmap and frametable?
> 

CTTOI, just mapping to xenheap is enough.

Jaeyong


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