| commit | 3d000db5688c8beff6319fb9ff4b98dcac32f798 | |
| author | Avi Kivity <avi@qumranet.com> | |
| Fri, 22 Aug 2008 16:24:38 +0000 (22 19:24 +0300) | ||
| committer | Avi Kivity <avi@qumranet.com> | |
| Wed, 15 Oct 2008 08:15:23 +0000 (15 10:15 +0200) | ||
| tree | 75e8464d300c232efa1793477c555e1a5b7e0a80 | treesnapshot (tar.gz zip) |
| parent | 6c41f428b72afe5a581b967590c12538db31d399 | commitdiff |
KVM: MMU: Add generic shadow walker
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>
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>
| arch/x86/kvm/mmu.c | diffblobblamehistory |