KVM: MMU: Add generic shadow walker

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We currently walk the shadow page tables in two places: direct map (for
real mode and two dimensional paging) and paging mode shadow.  Since we
anticipate requiring a third walk (for invlpg), it makes sense to have
a generic facility for shadow walk.

This patch adds such a shadow walker, walks the page tables and calls a
method for every spte encountered.  The method can examine the spte,
modify it, or even instantiate it.  The walk can be aborted by returning
nonzero from the method.

Signed-off-by: Avi Kivity <avi@qumranet.com>

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Avi Kivity 2008-08-22 19:24:38 +03:00

parent 6c41f428b7

commit 3d000db568

1 changed files with 34 additions and 0 deletions

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arch/x86/kvm/mmu.c

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