On Fri, 2018-09-21 at 00:48 +0200, David Lamparter wrote: > This is a *partial* revert of "powerpc/85xx: Load all early TLB entries > at once" (d9e1831a420267a7ced708bb259d65b0a3c0344d.) > > My dusty old P4080DS just completely fails to boot (no output at all) > without this revert. I have no clue what's going on here, I just > bisected it down and since it looks like an optimization to me I just > reverted it - and voilá, the P4080 boots again.
It's not an optimization; it was required to get kdump working, at least for certain choices of crash kernel location. I just tried booting a 32- bit kernel and did not see this problem -- but I don't have access to a p4080ds anymore. I tried with qemu e500mc, and also running a 32-bit kernel on e6500 (needs a tiny change to get past SMP init, since 32-bit isn't really supported on e6500, but you do get output even without that). Do you have a JTAG that can be used to find out where it's hanging? If not, I can try to get early debug working (needs an early IOMMU mapping). York, can you try booting the latest kernel on p4080ds? -Scott
