tree 0a02037091bf3c8a6412bc006318103c5a7d93ed
parent 145e52f31826045d8cccf5b840dc77d21a696651
author David Gibson <david@gibson.dropbear.id.au> 1363048297 +0000
committer Alexander Graf <agraf@suse.de> 1363962531 +0100

mmu-hash32: Don't look up page tables on BAT permission error

BEHAVIOUR CHANGE

Currently, on any failure translating an address with BATs, we proceed to
normal segment and page table translation.  That's incorrect if the
BAT error was due to permissions, rather than not finding a matching BAT.
We've gotten away with it because a guest would not usually put
translations for the same address in both BATs and page table.  Nonetheless
this patch corrects the logic, only doing page table lookup if no BAT
is found.  A matching BAT with bad permissions will now correctly trigger
an exception.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>