Nicholas Piggin d10e3c3900 powerpc/pseries: Fix scv instruction crash with kexec ... commit 21a741eb75 upstream. 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. Fixes: 7fa95f9ada ("powerpc/64s: system call support for scv/rfscv instructions") Cc: stable@vger.kernel.org # v5.9+ Reported-by: Sourabh Jain <sourabhjain@linux.ibm.com> Closes: https://lore.kernel.org/3b4b2943-49ad-4619-b195-bc416f1d1409@linux.ibm.com Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Tested-by: Gautam Menghani <gautam@linux.ibm.com> Tested-by: Sourabh Jain <sourabhjain@linux.ibm.com> Link: https://msgid.link/20240625134047.298759-1-npiggin@gmail.com Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-07-11 12:49:17 +02:00
..
core_32.c
core_64.c	powerpc/pseries: Fix scv instruction crash with kexec	2024-07-11 12:49:17 +02:00
core.c	powerpc/vmcore: Add MMU information to vmcoreinfo	2023-11-20 11:59:29 +01:00
crash.c	powerpc: mark more local variables as volatile	2023-08-14 21:54:04 +10:00
elf_64.c
file_load_64.c	powerpc: Move DMA64_PROPNAME define to a header	2023-08-18 17:03:15 +10:00
file_load.c
Makefile
ranges.c
relocate_32.S