Martin Schwidefsky f19fbd5ed6 s390: introduce execute-trampolines for branches ... Add CONFIG_EXPOLINE to enable the use of the new -mindirect-branch= and -mfunction_return= compiler options to create a kernel fortified against the specte v2 attack. With CONFIG_EXPOLINE=y all indirect branches will be issued with an execute type instruction. For z10 or newer the EXRL instruction will be used, for older machines the EX instruction. The typical indirect call basr %r14,%r1 is replaced with a PC relative call to a new thunk brasl %r14,__s390x_indirect_jump_r1 The thunk contains the EXRL/EX instruction to the indirect branch __s390x_indirect_jump_r1: exrl 0,0f j . 0: br %r1 The detour via the execute type instruction has a performance impact. To get rid of the detour the new kernel parameter "nospectre_v2" and "spectre_v2=[on,off,auto]" can be used. If the parameter is specified the kernel and module code will be patched at runtime. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		2018-02-07 15:57:02 +01:00
..
syscalls	s390/syscalls: add Makefile to generate system call header files	2018-01-23 07:36:51 +01:00
vdso32	s390/vdso: revise CFI annotations of vDSO functions	2017-12-13 10:51:36 +01:00
vdso64	s390/vdso: revise CFI annotations of vDSO functions	2017-12-13 10:51:36 +01:00
.gitignore	…
Makefile	s390: introduce execute-trampolines for branches	2018-02-07 15:57:02 +01:00
als.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
alternative.c	s390: add options to change branch prediction behaviour for the kernel	2018-02-05 13:49:17 +01:00
asm-offsets.c	s390: remove all code using the access register mode	2017-11-14 11:01:47 +01:00
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
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	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2018-02-01 09:31:04 -08:00
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	signal: Unify and correct copy_siginfo_to_user32	2018-01-15 19:56:20 -06:00
compat_wrapper.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
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
debug.c	s390/debug: use pK for kernel pointers	2017-11-24 14:28:34 +01:00
diag.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
dis.c	s390: kernel: add SPDX identifiers to the remaining files	2017-11-24 15:37:12 +01:00
dumpstack.c	s390: kernel: add SPDX identifiers to the remaining files	2017-11-24 15:37:12 +01:00
early.c	s390: add options to change branch prediction behaviour for the kernel	2018-02-05 13:49:17 +01:00
early_printk.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ebcdic.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
entry.S	s390: introduce execute-trampolines for branches	2018-02-07 15:57:02 +01:00
entry.h	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2017-11-13 11:47:01 -08:00
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
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
head.S	s390/head: replace hard coded values with constants	2018-01-23 07:36:46 +01:00
head64.S	s390: remove all code using the access register mode	2017-11-14 11:01:47 +01:00
head_kdump.S	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +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.c	s390: add options to change branch prediction behaviour for the kernel	2018-02-05 13:49:17 +01:00
irq.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
jump_label.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
kdebugfs.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
kprobes.c	s390/kprobes: Fix %p uses in error messages	2018-02-02 10:47:15 +01:00
lgr.c	s390: kernel: add SPDX identifiers to the remaining files	2017-11-24 15:37:12 +01:00
machine_kexec.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
mcount.S	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
module.c	s390: introduce execute-trampolines for branches	2018-02-07 15:57:02 +01:00
nmi.c	s390: kernel: add SPDX identifiers to the remaining files	2017-11-24 15:37:12 +01:00
nospec-branch.c	s390: introduce execute-trampolines for branches	2018-02-07 15:57:02 +01:00
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: kernel: Remove redundant license text	2017-11-24 15:37:20 +01:00
perf_cpum_cf_events.c	s390/cpum_cf: correct counter number of LAST_HOST_TRANSLATIONS	2018-02-02 10:47:16 +01:00
perf_cpum_sf.c	s390: kernel: Remove redundant license text	2017-11-24 15:37:20 +01:00
perf_event.c	s390: kernel: Remove redundant license text	2017-11-24 15:37:20 +01:00
perf_regs.c	s390: add a few more SPDX identifiers	2017-12-05 07:51:09 +01:00
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	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2017-11-13 11:47:01 -08:00
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
relocate_kernel.S	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2017-11-13 11:47:01 -08:00
runtime_instr.c	s390/runtime_instrumentation: re-add signum system call parameter	2018-02-05 07:34:50 +01:00
setup.c	s390: introduce execute-trampolines for branches	2018-02-07 15:57:02 +01:00
signal.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
smp.c	s390: introduce execute-trampolines for branches	2018-02-07 15:57:02 +01:00
stacktrace.c	s390: kernel: add SPDX identifiers to the remaining files	2017-11-24 15:37:12 +01:00
sthyi.c	s390: kernel: Remove redundant license text	2017-11-24 15:37:20 +01:00
suspend.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
swsusp.S	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sys_s390.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sysinfo.c	s390/sysinfo: add and display licensed internal code identifier	2018-02-02 10:47:15 +01:00
time.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2017-11-30 08:13:36 -08:00
topology.c	treewide: Use DEVICE_ATTR_RW	2018-01-09 16:33:31 +01:00
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
uprobes.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
vdso.c	s390: kernel: Remove redundant license text	2017-11-24 15:37:20 +01:00
vmlinux.lds.S	s390: introduce execute-trampolines for branches	2018-02-07 15:57:02 +01:00
vtime.c	s390: kernel: add SPDX identifiers to the remaining files	2017-11-24 15:37:12 +01:00