Hi Baoquan, On Thu, 2024-08-22 at 17:17 +0800, Baoquan He wrote: > > The change to enable CONFIG_CRASH_DUMP by default apparently broke the boot > > on 32-bit Power Macintosh systems which fail after GRUB with: > > > > "Error: You can't boot a kdump kernel from OF!" > > > > We may have to turn this off for 32-bit Power Macintosh systems. > > > > See this thread on debian-powerpc ML: https://lists.debian.org/debian-powerpc/2024/07/msg00001.html > > If so, fix need be made. > > We may need change in ARCH_SUPPORTS_CRASH_DUMP of ppc, can you or anyone > post a patch? I don't know how to identify 32-bit Power Macintosh. > > arch/powerpc/Kconfig: > === > config ARCH_SUPPORTS_CRASH_DUMP > def_bool PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP) > > config ARCH_SELECTS_CRASH_DUMP > def_bool y > depends on CRASH_DUMP > select RELOCATABLE if PPC64 || 44x || PPC_85xx > ...... > config PHYSICAL_START > hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL > default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL > default "0x00000000" I think the architecture does support crash dumps, but I think the kernel has to be booted from kexec in this case. Booting a kernel with CRASH_DUMP enabled won't work from Open Firmware. So, I think CRASH_DUMP should just be disabled for PPC_BOOK3S_32 by default and users who want to use it on these systems, will have to enable it explicitly. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
