On Fri, 2018-09-21 at 17:40 +0000, York Sun wrote: > On 09/20/2018 05:31 PM, Scott Wood wrote: > > 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, > > I haven't tried P4080DS for a long time. What defconfig do you use for > this board? I tried latest master branch (commit a27fb6d983c7b5) with > corenet_basic_defconfig, it didn't boot up. Kernel has an exception very > early (pc ffffae80). > > However, before I claimed the board, someone booted Linux 4.14.71 on > this board. I need to track down where the image came from.
Use corenet32_smp_defconfig corenet_basic_defconfig is just a fragment used by the makefiles in assembling the final config. -Scott
