Re: bogus gfn - mfn - gfn - mfn checks in guest_physmap_add_entry

[Olaf Hering <olaf@aepfle.de>]

On Thu, Nov 25, Tim Deegan wrote:

> Good catch.  It might be better to hook page_set_owner(), which ought to
> imply that the old m2p info is stale.   I had a quick look at all its
> callers and I _think_ it would be OK, but I haven't tested that at 
> all. :)

I tried page_set_owner().
Blindly adding set_gpfn_from_mfn there leads to compile errors, thanks
to all the redefinitions of mfn_t related macros.
Also, the page_set_owner() in alloc_heap_pages would cause Xen to crash
early.

It appears that maintaing machine_to_phys_mapping[] in
free_domheap_pages() is enough to avoid the ASSERTS.

Olaf