tree 300a9282556b3e441b9747dee4b5e51d440986fe
parent 7ed661bf852cefa1ab57ad709a675bfb029d47ab
author Paul Mackerras <paulus@samba.org> 1353366094 +0000
committer Alexander Graf <agraf@suse.de> 1354754033 +0100

KVM: PPC: Book3S HV: Fix bug causing loss of page dirty state

This fixes a bug where adding a new guest HPT entry via the H_ENTER
hcall would lose the "changed" bit in the reverse map information
for the guest physical page being mapped.  The result was that the
KVM_GET_DIRTY_LOG could return a zero bit for the page even though
the page had been modified by the guest.

This fixes it by only modifying the index and present bits in the
reverse map entry, thus preserving the reference and change bits.
We were also unnecessarily setting the reference bit, and this
fixes that too.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>