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alistair23-linux/arch/s390/kernel
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Gerald Schaefer a80313ff91 s390/kernel: introduce .dma sections 
With a relocatable kernel that could reside at any place in memory, code
and data that has to stay below 2 GB needs special handling.

This patch introduces .dma sections for such text, data and ex_table.
The sections will be part of the decompressor kernel, so they will not
be relocated and stay below 2 GB. Their location is passed over to the
decompressed / relocated kernel via the .boot.preserved.data section.

The duald and aste for control register setup also need to stay below
2 GB, so move the setup code from arch/s390/kernel/head64.S to
arch/s390/boot/head.S. The duct and linkage_stack could reside above
2 GB, but their content has to be preserved for the decompresed kernel,
so they are also moved into the .dma section.

The start and end address of the .dma sections is added to vmcoreinfo,
for crash support, to help debugging in case the kernel crashed there.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
 		2019-04-29 10:47:10 +02:00
..
syscalls y2038: add 64-bit time_t syscalls to all 32-bit architectures 2019-02-07 00:13:28 +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 s390: add various .gitignore files. 2012-05-16 14:42:41 +02:00
Makefile s390/kernel: build a relocatable kernel 2019-04-29 10:47:10 +02:00
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/kernel: introduce .dma sections 2019-04-29 10:47:10 +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 memblock: memblock_phys_alloc(): don't panic 2019-03-12 10:04:01 -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/kernel: introduce .dma sections 2019-04-29 10:47:10 +02:00
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.c s390/kernel: introduce .dma sections 2019-04-29 10:47:10 +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
ebcdic.c s390: ebcdic: convert comments to UTF-8 2018-08-23 18:48:43 -07:00
entry.S s390/kernel: convert SYSCALL and PGM_CHECK handlers to .quad 2019-04-29 10:47:10 +02:00
entry.h s390: add support for virtually mapped kernel stacks 2018-10-09 11:20:57 +02:00
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/kernel: introduce .dma sections 2019-04-29 10:47:10 +02:00
idle.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ima_arch.c s390/kexec_file: Disable kexec_load when IPLed secure 2019-04-29 10:44:03 +02:00
ipl.c s390/kernel: introduce .dma sections 2019-04-29 10:47:10 +02:00
ipl_vmparm.c s390/ipl: provide uapi header for list directed IPL 2019-04-26 12:34:05 +02:00
irq.c s390/pci: gather statistics for floating vs directed irqs 2019-04-29 10:47:01 +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: Create ipl report and pass to next kernel 2019-04-29 10:44:02 +02:00
kexec_image.c s390/kexec_file: Create ipl report and pass to next kernel 2019-04-29 10:44:02 +02:00
kprobes.c s390/kernel: introduce .dma sections 2019-04-29 10:47:10 +02:00
lgr.c s390: kernel: add SPDX identifiers to the remaining files 2017-11-24 15:37:12 +01:00
machine_kexec.c s390/kernel: introduce .dma sections 2019-04-29 10:47:10 +02:00
machine_kexec_file.c s390/sclp: do not use static sccbs 2019-04-29 10:47:10 +02:00
machine_kexec_reloc.c s390/kernel: build a relocatable kernel 2019-04-29 10:47:10 +02:00
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: Convert IS_ENABLED uses to __is_defined 2019-04-11 13:36:53 +02:00
nospec-sysfs.c s390: Convert IS_ENABLED uses to __is_defined 2019-04-11 13:36:53 +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.c s390/cpum_cf: Add support for CPU-MF SVN 6 2019-03-29 07:23:50 +01:00
perf_cpum_cf_common.c s390/cpum_cf: move common functions into a separate file 2019-02-22 09:19:55 +01:00
perf_cpum_cf_diag.c s390/cpum_cf_diag: Add support for CPU-MF SVN 6 2019-04-23 16:30:06 +02:00
perf_cpum_cf_events.c s390/cpum_cf: Add support for CPU-MF SVN 6 2019-03-29 07:23:50 +01:00
perf_cpum_sf.c perf/aux: Make perf_event accessible to setup_aux() 2019-02-06 10:00:39 -03:00
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 s390/kernel: convert SYSCALL and PGM_CHECK handlers to .quad 2019-04-29 10:47:10 +02:00
process.c s390: update sampling tag after task pid change 2018-04-23 07:57:17 +02:00
processor.c s390: report new CPU capabilities 2019-04-25 15:34:10 +02:00
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/kexec_file: Load new kernel to absolute 0 2019-04-29 10:44:00 +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/kernel: introduce .dma sections 2019-04-29 10:47:10 +02:00
signal.c s390: wire up rseq system call 2018-07-04 08:35:18 +02:00
smp.c s390/kernel: introduce .dma sections 2019-04-29 10:47:10 +02:00
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/kernel: introduce .dma sections 2019-04-29 10:47:10 +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 treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -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 s390/kernel: introduce .dma sections 2019-04-29 10:47:10 +02:00
uprobes.c s390/uprobes: implement arch_uretprobe_is_alive() 2018-04-23 07:57:16 +02:00
vdso.c s390: don't build vdso32 with clang 2019-04-11 13:36:49 +02:00
vmlinux.lds.S s390/kernel: build a relocatable kernel 2019-04-29 10:47:10 +02:00
vtime.c s390/vtime: steal time exponential moving average 2019-03-06 14:59:50 +01:00