From: Xiao Guangrong Date: Wed, 19 Jun 2013 09:09:19 +0000 (+0800) Subject: KVM: MMU: update the documentation for reverse mapping of parent_pte X-Git-Tag: v3.12-rc1~503^2~31 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6c806a7332e6d36c1f95966b4a8a22f342b68948;p=kernel%2Fkernel-generic.git 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 Signed-off-by: Paolo Bonzini --- diff --git a/Documentation/virtual/kvm/mmu.txt b/Documentation/virtual/kvm/mmu.txt index 43fcb76..869abcc 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