On Thu, Oct 20, 2011 at 05:08:24PM +0900, Simon Horman wrote: > On Thu, Oct 20, 2011 at 08:01:06AM +0100, Will Deacon wrote: > > On Thu, Oct 20, 2011 at 05:24:45AM +0100, Simon Horman wrote: > > > Hi Will, Hi All, > > > > Hi Simon, > > Hi Will, > > > > it appears that "ARM: proc: add definition of cpu_reset for > > > ARMv6 and ARMv7 cores" (f4daf06fc23b99df5ca5b3e892428b91e148cc52), > > > which was introduced for 3.1-rc1, causes a regression and that > > > kexec no longer works on ARM. The board that I am testing > > > on is a Renesas Mackerel which has an SH7372 (ARMv7) processor. > > > > Wow, I'm surprised the old code worked at all on an ARMv7 CPU! It's certainly > > highly unlikely to work by the letter of the architecture, so I guess the > > planets aligned in just the right way for your particular implementation. > > > > Please can you try my kexec/mmu-off patches? They should add the bits and > > pieces you need for kexec to work reliably on a UP system. I plan to finish > > these off next week in Prague so hopefully they'll hit mainline in the near > > future. > > > > https://github.com/wdeacon/linux-wd/commits/kexec/mmu-off > > Thanks, I will try your patches and let you know how I go. I have tested the kexec/mmu-off branch of your tree on the UP board I mentioned above and kexec works :) > You mention UP in particular, which I will test. > Do you have any thoughts on SMP?
