Older ppc64 kernels, namely those missing FIXUP_ENDIAN or opal_reinit_cpus, will fail to boot if started via kexec from a little-endian kernel. The following two patches make sure that the current endianess is reset to big-endian just before entering the target kernel, and are accompanied by a separate patch to kexec-lite that resets the endianess of the boot cpu.
Changes in v3: Move the call to opal_reinit_cpus into kexec_sequence so we can call it in real mode with interrupts disabled. Update the kexec_sequence prototype so that we can check if OPAL is present. Fix the !CONFIG_PPC_BOOK3S_64 case in kexec_wait to correctly branch to 0x60 Changes in v2: Add an #ifdef for subarch-specific code Neaten the endian check (and extra call to mfmsr!) by modifying the msr and branching to the target kernel in the same call to rfid. Samuel Mendoza-Jonas (2): powerpc/kexec: Reset secondary cpu endianess before kexec powerpc/kexec: Reset HILE before entering target kernel arch/powerpc/kernel/machine_kexec_64.c | 6 ++++-- arch/powerpc/kernel/misc_64.S | 32 ++++++++++++++++++++++++++++---- 2 files changed, 32 insertions(+), 6 deletions(-) -- 2.4.5 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
