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Diffstat (limited to 'Documentation/kvm/mmu.txt')
| -rw-r--r-- | Documentation/kvm/mmu.txt | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/kvm/mmu.txt b/Documentation/kvm/mmu.txt index 0e872ae3091..2201dcba92a 100644 --- a/Documentation/kvm/mmu.txt +++ b/Documentation/kvm/mmu.txt @@ -180,7 +180,9 @@ Shadow pages contain the following information: guest pages as leaves. gfns: An array of 512 guest frame numbers, one for each present pte. Used to - perform a reverse map from a pte to a gfn. + perform a reverse map from a pte to a gfn. When role.direct is set, any + element of this array can be calculated from the gfn field when used, in + this case, the array of gfns is not allocated. See role.direct and gfn. slot_bitmap: A bitmap containing one bit per memory slot. If the page contains a pte mapping a page from memory slot n, then bit n of slot_bitmap will be set |