Displaying 2 results from an estimated 2 matches for "guest_l2e_get_flags".
2009 Apr 22
7
Consult some concepts about shadow paging mechanism
Dear All:
I am pretty new to xen-devel, please correct me in the following.
Assume we have the following terms
GPT: guest page table
SPT: shadow page table
(Question a) When guest OS is running, is it always using SPT for
address translation? If it is the case, how does guest OS refer and
modify its own GPT content? It seems that there is a page table entry
in SPT for the GPT page.
(Question
2007 Jul 02
3
Walking an HVM''s shadow page tables and other memory management questions.
...countered also has to do with walking the shadow
page tables to obtain the MFN of the underlying Windows VA address.
sh_guest_map_l1e(), Line 520 in the same file, has this code executed
after it walks the guest page tables to obtain the walk_t gw variable.
if ( gw.l2e &&
(guest_l2e_get_flags(*gw.l2e) & _PAGE_PRESENT) &&
!(guest_supports_superpages(v) && (guest_l2e_get_flags(*gw.l2e)
& _PAGE_PSE)) )
(XEN) mm.c:2573:d1 grant host mapping: va:81696000 frame:0x15f140
(XEN) mm.c:2507:d1 grant va mapping: va:81696000
(XEN) multi.c:236:d1 guest_walk...