xen: add m2p override mechanism

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Add a simple hashtable based mechanism to override some portions of the
m2p, so that we can find out the pfn corresponding to an mfn of a
granted page. In fact entries corresponding to granted pages in the m2p
hold the original pfn value of the page in the source domain that
granted it.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

...

This commit is contained in:

Jeremy Fitzhardinge 2010-12-15 13:19:33 +00:00 • committed by Konrad Rzeszutek Wilk

parent b5eafe924b

commit 448f283193

2 changed files with 93 additions and 3 deletions

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16

arch/x86/include/asm/xen/page.h

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80

arch/x86/xen/p2m.c

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