RE: [Xen-users] Pacifica/VT

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> It's certainly our plan to support 64-bit Xen running 32-bit 
> OS's. As with Intel's solution, it's not ENTIRELY trivial to 
> support 3-level page-tables on a system which natively needs 
> 4-level page-tables, and the related interesting problems 
> that this leads to. But by all accounts, it should "just 
> work". This may or may not be in the first release of code to 
> the public, that I can't really say, as I'm not sure what 
> will be released and when...

3-on-4 is a slight pain because the 3-level PGDs may not be page
aligned. (barf)

2-on-3 and 2-on-4 are a pain because each page table page in the L2 has
to be turned into two pages in the 3/4-level pagetable because of the
number of PTEs.

Ian

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