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linux-stable/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: c929500d7a ("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
base.S s390: remove unused s390_base_ext_handler 2020-11-09 11:20:58 +01:00
cache.c
compat_audit.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
compat_linux.c
compat_linux.h
compat_ptrace.h
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.c s390: support command lines longer than 896 bytes 2021-10-26 15:21:31 +02:00
early_printk.c s390/sclp: remove unused sclp_early_printk_forced 2020-09-21 08:08:44 +02:00
ebcdic.c
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
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
ipl.c s390/kexec: fix return code handling 2021-11-18 17:25:35 +01:00
ipl_vmparm.c s390/cio: remove unused include linux/spinlock.h from cio.h 2021-07-27 09:39:13 +02:00
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
kexec_elf.c
kexec_image.c
kprobes.c s390 updates for the 5.16 merge window 2021-11-06 14:48:06 -07:00
kprobes_insn_page.S s390/kprobes: move insn_page to text segment 2020-10-09 23:45:30 +02:00
lgr.c s390: convert to msecs_to_jiffies() 2020-06-29 16:31:46 +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
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
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.c s390/cpumf: cpum_cf PMU displays invalid value after hotplug remove 2021-11-08 14:17:49 +01:00
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_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
relocate_kernel.S
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