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Re: [Xen-devel] [V15 PATCH 1/2] pvh dom0: Add and remove foreign pages

At 16:30 -0700 on 22 May (1400772630), Mukesh Rathor wrote:
> In this patch, a new function, p2m_add_foreign(), is added
> to map pages from a foreign guest into dom0 for various purposes
> like domU creation, running xentrace, etc... Such pages are
> typed p2m_map_foreign.  Note, it is the nature of such pages
> that a refcnt is held during their stay in the p2m. The
> refcnt is added and released in the low level ept function
> atomic_write_ept_entry. That macro is converted to a function to allow
> for such refcounting, which only applies to leaf entries in the ept.
> Furthermore, please note that paging/sharing is disabled if the
> controlling or hardware domain is pvh. Any enabling of those features
> would need to ensure refcnt are properly maintained for foreign types,
> or paging/sharing is skipped for foreign types.
> Also, we change get_pg_owner so it allows foreign mappings for pvh.

But you no longer actually call get_pg_owner() for PVH domains, right?
So that hunk should go away.  With that done,

Reviewed-by: Tim Deegan <tim@xxxxxxx>



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