On 20.05.2011, at 05:34, David Gibson wrote: > Early ppc64 CPUs include a hack to partially simulate the ppc32 segment > registers, by translating writes to them into writes to the SLB. This is > not used by any current Linux kernel, but it is used by the openbios used > in the qemu mac99 model. > > Commit 81762d6dd0d430d87024f2c83e9c4dcc4329fb7d, cleaning up the SLB > handling introduced a bug in this code, breaking the openbios currently in > qemu. Specifically, there was an off by one error bitshuffling the > register format used by mtsr into the format needed for the SLB load, > causing the flag bits to end up in the wrong place. This caused the > storage keys to be wrong under openbios, meaning that the translation code > incorrectly thought a legitimate access was a permission violation. > > This patch fixes the bug, at the same time it fixes some build bug in the > MMU debugging code (only exposed when DEBUG_MMU is enabled).
Thanks, applied to ppc-next :) Alex
