linux/arch/s390/kernel
Martin Schwidefsky 8727638426 s390/setup: fix early warning messages
The setup_lowcore() function creates a new prefix page for the boot CPU.
The PSW mask for the system_call, external interrupt, i/o interrupt and
the program check handler have the DAT bit set in this new prefix page.

At the time setup_lowcore is called the system still runs without virtual
address translation, the paging_init() function creates the kernel page
table and loads the CR13 with the kernel ASCE.

Any code between setup_lowcore() and the end of paging_init() that has
a BUG or WARN statement will create a program check that can not be
handled correctly as there is no kernel page table yet.

To allow early WARN statements initially setup the lowcore with DAT off
and set the DAT bit only after paging_init() has completed.

Cc: stable@vger.kernel.org
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2019-02-20 09:48:29 +01:00
..
syscalls s390: remove compat_wrapper.c 2019-01-18 09:33:20 +01:00
vdso32 s390/vdso: add missing FORCE to build targets 2018-10-26 10:19:40 +02:00
vdso64 s390/vdso: add missing FORCE to build targets 2018-10-26 10:19:40 +02:00
.gitignore
alternative.c s390: add automatic detection of the spectre defense 2018-03-28 08:38:24 +02:00
asm-offsets.c s390: add support for virtually mapped kernel stacks 2018-10-09 11:20:57 +02:00
audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
audit.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
base.S s390: add support for virtually mapped kernel stacks 2018-10-09 11:20:57 +02:00
cache.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat_audit.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat_linux.c s390: use generic UID16 implementation 2019-01-18 09:33:18 +01:00
compat_linux.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat_ptrace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compat_signal.c s390/compat: fix setup_frame32 2018-04-10 07:38:54 +02:00
cpcmd.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crash_dump.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
debug.c s390: no need to check return value of debugfs_create functions 2019-01-28 15:58:55 +01:00
diag.c s390/setup: set control program code via diag 318 2019-01-28 15:58:53 +01:00
dis.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
dumpstack.c s390/dumpstack: print psw mask and address again 2018-10-10 07:37:20 +02:00
early_nobss.c s390/kasan: add initialization code and enable it 2018-10-09 11:21:20 +02:00
early_printk.c s390/hibernate: fix error handling when suspend cpu != resume cpu 2018-09-20 13:20:23 +02:00
early.c s390: move ipl block and cmd line handling to early boot phase 2018-10-09 11:21:14 +02:00
ebcdic.c s390: ebcdic: convert comments to UTF-8 2018-08-23 18:48:43 -07:00
entry.h s390: add support for virtually mapped kernel stacks 2018-10-09 11:20:57 +02:00
entry.S s390: autogenerate compat syscall wrappers 2019-01-18 09:33:19 +01:00
fpu.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ftrace.c s390/function_graph: Simplify with function_graph_enter() 2018-11-27 20:31:30 -05:00
guarded_storage.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2017-11-13 11:47:01 -08:00
head64.S s390: remove dead code 2019-02-07 11:56:57 +01:00
idle.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ipl_vmparm.c s390: move ipl block and cmd line handling to early boot phase 2018-10-09 11:21:14 +02:00
ipl.c s390/kasan: reipl and kexec support 2018-10-09 11:21:27 +02:00
irq.c s390: unify stack size definitions 2018-10-09 11:20:58 +02:00
jump_label.c jump_label: move 'asm goto' support test to Kconfig 2019-01-06 09:46:51 +09:00
kdebugfs.c s390: no need to check return value of debugfs_create functions 2019-01-28 15:58:55 +01:00
kexec_elf.c s390/kexec_file: Add ELF loader 2018-04-16 09:10:23 +02:00
kexec_image.c s390/kexec_file: Add crash support to image loader 2018-04-16 09:10:22 +02:00
kprobes.c bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe 2018-06-21 12:33:19 +02:00
lgr.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
machine_kexec_file.c s390, kexec_file: drop arch_kexec_mem_walk() 2018-12-06 14:38:49 +00:00
machine_kexec.c s390: add support for virtually mapped kernel stacks 2018-10-09 11:20:57 +02:00
Makefile s390: remove compat_wrapper.c 2019-01-18 09:33:20 +01:00
mcount.S s390/ftrace: Add -mfentry and -mnop-mcount support 2018-08-15 22:39:53 -04:00
module.c s390/kasan: dynamic shadow mem allocation for modules 2018-10-09 11:21:23 +02:00
nmi.c headers: untangle kmemleak.h from mm.h 2018-04-05 21:36:27 -07:00
nospec-branch.c s390: detect etoken facility 2018-07-18 08:32:17 +02:00
nospec-sysfs.c s390: detect etoken facility 2018-07-18 08:32:17 +02:00
os_info.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf_cpum_cf_events.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
perf_cpum_cf.c s390/cpum_cf: Reject request for sampling in event initialization 2018-11-14 13:44:55 +01:00
perf_cpum_sf.c s390/cpum_sf: Rework attribute definition for diagnostic sampling 2018-11-02 08:31:56 +01:00
perf_event.c s390: kernel: Remove redundant license text 2017-11-24 15:37:20 +01:00
perf_regs.c s390/perf: fix gcc 8 array-bounds warning 2018-07-02 11:24:54 +02:00
pgm_check.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
process.c s390: update sampling tag after task pid change 2018-04-23 07:57:17 +02:00
processor.c s390: run user space and KVM guests with modified branch prediction 2018-02-05 14:48:50 +01:00
ptrace.c s390/gs: add compat regset for the guarded storage broadcast control block 2017-11-28 17:33:15 +01:00
reipl.S s390/kernel: use expoline for indirect branches 2018-05-07 21:12:39 +02:00
relocate_kernel.S s390: assume diag308 set always works 2018-04-10 07:38:59 +02:00
runtime_instr.c s390/runtime_instrumentation: re-add signum system call parameter 2018-02-05 07:34:50 +01:00
setup.c s390/setup: fix early warning messages 2019-02-20 09:48:29 +01:00
signal.c s390: wire up rseq system call 2018-07-04 08:35:18 +02:00
smp.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
stacktrace.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
sthyi.c s390/sthyi: Fix machine name validity indication 2018-10-15 12:17:00 +02:00
suspend.c s390: unify linker symbols usage 2018-02-27 08:05:23 +01:00
swsusp.S s390: add support for virtually mapped kernel stacks 2018-10-09 11:20:57 +02:00
sys_s390.c s390: autogenerate compat syscall wrappers 2019-01-18 09:33:19 +01:00
sysinfo.c s390: no need to check return value of debugfs_create functions 2019-01-28 15:58:55 +01:00
time.c s390/time: Remove read_boot_clock64() 2018-07-20 00:02:41 +02:00
topology.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
trace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
traps.c signal/s390: Use force_sig_fault where appropriate 2018-04-25 10:44:08 -05:00
uprobes.c s390/uprobes: implement arch_uretprobe_is_alive() 2018-04-23 07:57:16 +02:00
vdso.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
vmlinux.lds.S s390: avoid vmlinux segments overlap 2018-10-26 10:19:40 +02:00
vtime.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00