K 10
svn:author
V 8
jhibbits
K 8
svn:date
V 27
2019-11-06T04:40:12.113440Z
K 7
svn:log
V 942
powerpc/booke: Fix pmap_mapdev_attr() for multi-TLB1 entry mappings

Also, fix pmap_change_attr() to ignore non-kernel mappings.

* Fix a masking bug in mmu_booke_mapdev_attr() which caused it to align
  mappings to the smallest mapping alignment, instead of the largest.  This
  caused mappings to be potentially pessimally aligned, using more TLB
  entries than necessary.
* Return existing mappings from mmu_booke_mapdev_attr() that span more than
  one TLB1 entry.  The drm-current-kmod drivers map discontiguous segments
  of the GPU, resulting in more than one TLB entry being used to satisfy the
  mapping.
* Ignore non-kernel mappings in mmu_booke_change_attr().  There's a bug in
  the linuxkpi layer that causes it to actually try to change physical
  address mappings, instead of virtual addresses.  amd64 doesn't encounter
  this because it ignores non-kernel mappings.

With this it's possible to use drm-current-kmod on Book-E.

END