Neel Natu f888763dd8 Add PG_RW check when translating a guest linear to guest physical address.
Set the accessed and dirty bits in the page table entry. If it fails then
restart the page table walk from the beginning. This might happen if another
vcpu modifies the page tables simultaneously.

Reviewed by:	alc, kib
2014-05-20 20:30:28 +00:00
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