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linux/arch/s390/kernel
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Christian Borntraeger 1ea1d6a847 s390/nmi: handle guarded storage validity failures for KVM guests 
machine check validity bits reflect the state of the machine check. If a
guest does not make use of guarded storage, the validity bit might be
off. We can not use the host CR bit to decide if the validity bit must
be on. So ignore "invalid" guarded storage controls for KVM guests in
the host and rely on the machine check being forwarded to the guest.  If
no other errors happen from a host perspective everything is fine and no
process must be killed and the host can continue to run.

Cc: stable@vger.kernel.org
Fixes: c929500d7a5a ("s390/nmi: s390: New low level handling for machine check happening in guest")
Reported-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Tested-by: Carsten Otte <cotte@de.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2022-01-23 10:20:02 +01:00
..
syscalls
mm/mempolicy: wire up syscall set_mempolicy_home_node
2022-01-15 16:30:30 +02:00
vdso32
s390/vdso: remove -nostdlib compiler flag
2021-11-16 12:29:19 +01:00
vdso64
s390/vdso: filter out -mstack-guard and -mstack-size
2021-11-16 12:29:19 +01:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
alternative.c
s390: introduce text_poke_sync()
2021-10-11 20:55:58 +02:00
asm-offsets.c
s390: support command lines longer than 896 bytes
2021-10-26 15:21:31 +02:00
audit.c
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
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: remove unused s390_base_ext_handler
2020-11-09 11:20:58 +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
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
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/signal: switch to using vdso for sigreturn and syscall restart
2021-07-08 22:09:47 +02:00
cpcmd.c
s390/cpcmd: use physical address for command and response
2021-10-26 15:21:28 +02:00
crash_dump.c
s390/crash_dump: fix virtual vs physical address handling
2021-12-20 10:21:55 +01:00
debug.c
s390/sclp: add tracing of SCLP interactions
2021-08-25 11:03:35 +02:00
diag.c
s390: rename dma section to amode31
2021-08-05 14:10:53 +02:00
dis.c
s390/disassembler: update opcode table
2021-12-16 19:58:07 +01:00
dumpstack.c
exit: Add and use make_task_dead.
2021-12-13 12:04:45 -06:00
early_printk.c
s390/sclp: remove unused sclp_early_printk_forced
2020-09-21 08:08:44 +02:00
early.c
s390: support command lines longer than 896 bytes
2021-10-26 15:21:31 +02:00
ebcdic.c
s390: ebcdic: convert comments to UTF-8
2018-08-23 18:48:43 -07:00
entry.h
s390/boot: allocate amode31 section in decompressor
2021-10-04 09:49:37 +02:00
entry.S
s390: add support for BEAR enhancement facility
2021-10-26 15:21:29 +02:00
fpu.c
s390: convert to generic entry
2021-01-19 12:29:26 +01:00
ftrace.c
s390/ftrace: remove preempt_disable()/preempt_enable() pair
2021-12-10 16:12:34 +01:00
ftrace.h
s390/ftrace: implement hotpatching
2021-08-03 14:31:40 +02:00
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/boot: initialize control registers in decompressor
2021-10-04 09:49:37 +02:00
idle.c
s390/time,idle: get rid of unsigned long long
2021-03-08 10:46:27 +01:00
ima_arch.c
s390/kexec_file: Disable kexec_load when IPLed secure
2019-04-29 10:44:03 +02:00
ipl_vmparm.c
s390/cio: remove unused include linux/spinlock.h from cio.h
2021-07-27 09:39:13 +02:00
ipl.c
s390/kexec: fix return code handling
2021-11-18 17:25:35 +01:00
irq.c
s390/entry: fix duplicate tracking of irq nesting level
2021-12-12 18:52:26 +01:00
jump_label.c
s390/jump_label: add __init_or_module annotation
2021-10-11 20:55:58 +02:00
kdebugfs.c
s390: no need to check return value of debugfs_create functions
2019-01-28 15:58:55 +01:00
kexec_elf.c
kexec: Fix file verification on S390
2019-09-10 13:27:51 +01:00
kexec_image.c
kexec_file: split KEXEC_VERIFY_SIG into KEXEC_SIG and KEXEC_SIG_FORCE
2019-08-19 21:54:15 -07:00
kprobes_insn_page.S
s390/kprobes: move insn_page to text segment
2020-10-09 23:45:30 +02:00
kprobes.c
s390 updates for the 5.16 merge window
2021-11-06 14:48:06 -07:00
lgr.c
s390: convert to msecs_to_jiffies()
2020-06-29 16:31:46 +02:00
machine_kexec_file.c
s390/kexec: handle R_390_PLT32DBL rela in arch_kexec_apply_relocations_add()
2021-12-10 16:12:34 +01:00
machine_kexec_reloc.c
s390/kaslr: add support for R_390_JMP_SLOT relocation type
2020-05-20 10:13:27 +02:00
machine_kexec.c
s390/nmi: add missing __pa/__va address conversion of extended save area
2021-12-06 14:42:26 +01:00
Makefile
arch: Make ARCH_STACKWALK independent of STACKTRACE
2021-12-10 14:06:03 +00:00
mcount.S
s390/ftrace: add HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALL support
2021-10-19 15:39:53 +02:00
module.c
mm: defer kmemleak object creation of module_alloc()
2022-01-15 16:30:25 +02:00
nmi.c
s390/nmi: handle guarded storage validity failures for KVM guests
2022-01-23 10:20:02 +01:00
nospec-branch.c
s390: introduce nospec_uses_trampoline()
2021-10-26 15:21:29 +02:00
nospec-sysfs.c
s390: introduce nospec_uses_trampoline()
2021-10-26 15:21:29 +02:00
numa.c
s390/numa: move code to arch/s390/kernel
2020-08-11 18:16:55 +02:00
os_info.c
s390/dump: introduce boot data 'oldmem_data'
2021-07-27 09:39:16 +02:00
perf_cpum_cf_common.c
s390/cpumf: Support for CPU Measurement Facility CSVN 7
2022-01-17 14:13:08 +01:00
perf_cpum_cf_events.c
s390/cpumf: Support for CPU Measurement Facility CSVN 7
2022-01-17 14:13:08 +01:00
perf_cpum_cf.c
s390/cpumf: cpum_cf PMU displays invalid value after hotplug remove
2021-11-08 14:17:49 +01:00
perf_cpum_sf.c
s390/cpumf: Support for CPU Measurement Sampling Facility LS bit
2022-01-17 14:13:08 +01:00
perf_event.c
s390: Get rid of oprofile leftovers
2021-04-22 13:32:39 +01:00
perf_regs.c
perf/arch: Remove perf_sample_data::regs_user_copy
2020-11-09 18:12:34 +01:00
process.c
s390/exit: remove dead reference to do_exit from copy_thread
2021-12-16 19:58:06 +01:00
processor.c
s390: replace deprecated CPU-hotplug functions
2021-08-05 14:10:53 +02:00
ptrace.c
s390/traps: add struct to access transactional diagnostic block
2021-06-07 17:06:58 +02:00
reipl.S
s390: add missing ENDPROC statements to assembler functions
2019-05-02 13:54:11 +02:00
relocate_kernel.S
s390: add missing ENDPROC statements to assembler functions
2019-05-02 13:54:11 +02:00
runtime_instr.c
s390/runtime_instrumentation: fix storage key handling
2020-08-17 13:17:10 +02:00
setup.c
s390/nmi: disable interrupts on extended save area update
2021-12-16 19:58:07 +01:00
signal.c
s390: remove do_signal() prototype and do_notify_resume() function
2021-08-25 11:03:34 +02:00
smp.c
s390/crash_dump: fix virtual vs physical address handling
2021-12-20 10:21:55 +01:00
stacktrace.c
kprobes: treewide: Make it harder to refer kretprobe_trampoline directly
2021-09-30 21:24:06 -04:00
sthyi.c
s390/sthyi: use register pair instead of register asm
2021-06-18 16:41:22 +02:00
syscall.c
s390: add support for BEAR enhancement facility
2021-10-26 15:21:29 +02:00
sysinfo.c
s390/sysinfo: get rid of register asm
2021-06-18 16:41:23 +02:00
text_amode31.S
s390/diag: make restart_part2 a local label
2021-08-25 11:03:34 +02:00
time.c
s390/vdso: fix initializing and updating of vdso_data
2021-03-25 21:57:26 +01:00
topology.c
s390/topology: fix topology information when calling cpu hotplug notifiers
2021-09-07 13:38:41 +02:00
trace.c
s390/ftrace: fix potential crashes when switching tracers
2020-04-22 16:20:55 +02:00
traps.c
signal: Replace force_fatal_sig with force_exit_sig when in doubt
2021-11-19 09:15:58 -06:00
unwind_bc.c
s390/unwind: stop gracefully at user mode pt_regs in irq stack
2019-12-18 23:29:26 +01:00
uprobes.c
s390: Fix fall-through warnings for Clang
2021-07-13 14:43:09 -05:00
uv.c
s390/uv: fix memblock virtual vs physical address confusion
2021-12-16 19:58:07 +01:00
vdso.c
s390/vdso: add minimal compat vdso
2021-07-08 15:37:28 +02:00
vmlinux.lds.S
s390/boot: allocate amode31 section in decompressor
2021-10-04 09:49:37 +02:00
vtime.c
s390/vtime: fix increased steal time accounting
2021-03-15 19:09:25 +01:00