[PATCH] KVM: MMU: Implement simple reverse mapping

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Keep in each host page frame's page->private a pointer to the shadow pte which
maps it.  If there are multiple shadow ptes mapping the page, set bit 0 of
page->private, and use the rest as a pointer to a linked list of all such
mappings.

Reverse mappings are needed because we when we cache shadow page tables, we
must protect the guest page tables from being modified by the guest, as that
would invalidate the cached ptes.

Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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Avi Kivity 2007-01-05 16:36:38 -08:00 • committed by Linus Torvalds

parent 399badf315

commit cd4a4e5374

4 changed files with 142 additions and 13 deletions

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1

drivers/kvm/kvm.h

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1

drivers/kvm/kvm_main.c

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152

drivers/kvm/mmu.c

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1

drivers/kvm/paging_tmpl.h

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