[Xen-devel] doubt on phys_to_machine_mapping

[Sandesh <sandesh.ahiremath@xxxxxxxxx>]

Hi all,
  Can some one tell me where phys_to_machine_mapping is being
initialized for a domU having paging mode set to PG_translate.
I see that, populate_physmap() after calling __alloc_xen_heap_pages only
updates the machine_to_physmap but how is the mfn for the allocated page
being updated/set for phys_to_machine_mapping?? 

I see that phys_to_machine_mapping is a #defined to RO_MPT_VIRT_START
which inturn is defined as PML4_ADDR(256).. what is this??  i have
completely lose track from here on.

Thanks in advance.

Regards,
 Sandesh


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