On 21.05.2011, at 03:58, Alexander Graf wrote: > > Am 21.05.2011 um 00:37 schrieb Andreas Färber <andreas.faer...@web.de>: > >> Am 20.05.2011 um 09:40 schrieb Alexander Graf: >> >>> 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 :) >> >> Nack, this does not fix ppc64 for me! How did you test it, Alex??? > > I booted a ppc64 kernel on a ppc64 Linux system with tcg and it booted fine > for me. Maybe you're hitting yet another issue?
Sorry for not being overly precise; host userland was running in 32-bit. Alex
