Nicholas Piggin <npig...@gmail.com> writes: > kexec on pseries disables AIL (reloc_on_exc), required for scv > instruction support, before other CPUs have been shut down. This means > they can execute scv instructions after AIL is disabled, which causes an > interrupt at an unexpected entry location that crashes the kernel. > > Change the kexec sequence to disable AIL after other CPUs have been > brought down. > > As a refresher, the real-mode scv interrupt vector is 0x17000, and the > fixed-location head code probably couldn't easily deal with implementing > such high addresses so it was just decided not to support that interrupt > at all. > > Reported-by: Sourabh Jain <sourabhj...@linux.ibm.com> Was this reported publicly? I don't remember it.
cheers
