K 10
svn:author
V 6
cherry
K 8
svn:date
V 27
2012-12-11T23:59:14.928283Z
K 7
svn:log
V 865
This change addresses a few issues related to the kernel pmap:
 - pte accesses are now possible by ad-hoc mapping of pte pages.
   XXX: vtopte() and friends assume dmap
 - vtop() and ptov() style functions ( essentialy v<->p map lookups
   for the kernel pmap ) are now able to consult the pv entry list and
   kernel object(s). We don't assume a fixed offset, although
   va == pa + KERNBASE is true for boottime pages and is guaranteed by
   the VM xen booloader and can be accessed via the PTOV() and VTOP()
   macros. This may be revamped in future.
 - XXX: kernel pte machine page pointers (returned via
   pmap_kextract_ma()) seem to have their LSBs set. ptes are aligned at
   8bytes  (64bits) on x86_64, so this is a bit mysterious. Masking
   out the entry pointers seem to work for now, but I need to
   reinvestigate this.

Approved by: gibbs (implicit)

END