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authorXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>2013-06-19 13:09:19 +0400
committerPaolo Bonzini <pbonzini@redhat.com>2013-06-19 14:32:21 +0400
commit6c806a7332e6d36c1f95966b4a8a22f342b68948 (patch)
tree13d0a7f613114c47844a58d7a28dd8b628ee2ee4 /Documentation/virtual
parentd8968f1f334c18bf65178b757a82864ef3f37613 (diff)
downloadlinux-6c806a7332e6d36c1f95966b4a8a22f342b68948.tar.xz
KVM: MMU: update the documentation for reverse mapping of parent_pte
Update the document to match the current reverse mapping of parent_pte Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/mmu.txt12
1 files changed, 6 insertions, 6 deletions
diff --git a/Documentation/virtual/kvm/mmu.txt b/Documentation/virtual/kvm/mmu.txt
index 43fcb761ed16..869abcc48315 100644
--- a/Documentation/virtual/kvm/mmu.txt
+++ b/Documentation/virtual/kvm/mmu.txt
@@ -191,12 +191,12 @@ Shadow pages contain the following information:
A counter keeping track of how many hardware registers (guest cr3 or
pdptrs) are now pointing at the page. While this counter is nonzero, the
page cannot be destroyed. See role.invalid.
- multimapped:
- Whether there exist multiple sptes pointing at this page.
- parent_pte/parent_ptes:
- If multimapped is zero, parent_pte points at the single spte that points at
- this page's spt. Otherwise, parent_ptes points at a data structure
- with a list of parent_ptes.
+ parent_ptes:
+ The reverse mapping for the pte/ptes pointing at this page's spt. If
+ parent_ptes bit 0 is zero, only one spte points at this pages and
+ parent_ptes points at this single spte, otherwise, there exists multiple
+ sptes pointing at this page and (parent_ptes & ~0x1) points at a data
+ structure with a list of parent_ptes.
unsync:
If true, then the translations in this page may not match the guest's
translation. This is equivalent to the state of the tlb when a pte is