On Fri, 2007-06-08 at 14:00 +1000, Michael Neuling wrote: > On pSeries the firmware features are not setup until ppc_md.init_early, > so we can't do the firmware feature sections fixups till after this. > > Currently firmware feature sections is only used on iSeries which inits > the firmware features much earlier. This is a bug in waiting on > pSeries. > > Signed-off-by: Michael Neuling <[EMAIL PROTECTED]> > --- > paulus: since we aren't hitting this currently, it can wait for 2.6.23.
This patch will cause the kernel to blow up at boot on various machines, I'm surprised we haven't hit that already. The problem is that we can't service SLB miss on a !iseries machine if CONFIG_PPC_ISERIES is set, before the fixup occurs. (Some iseries code in there will not have been nop'ed out and SRR0 will be loaded with crap). Thus we die when unflattening the device-tree on some machines. There are two possibly solutions I see in the long run: - We could set the FW features earlier on pseries, though that is a bit annoying because that means doing it before the device-tree is unflattened. - We could constraint lmb_alloc to the first segment until the FW fixup occurs, either within lmb_alloc itself, or fixup the callers such as unflatten_device_tree, to pass an explicit limit. What do you think ? Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
