AuxXxilium/linux_dsm_epyc7002
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dcd2a9aaa0
linux_dsm_epyc7002/arch/s390/kernel
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Martin Schwidefsky dcd2a9aaa0 s390/kvm: fix interrupt race with HANDLE_SIE_INTERCEPT 
The HANDLE_SIE_INTERCEPT macro is used in the interrupt handlers
and the program check handler to undo a few changes done by sie64a.
Among them are guest vs host LPP, the gmap ASCE vs kernel ASCE and
the bit that indicates that SIE is currently running on the CPU.

There is a race of a voluntary SIE exit vs asynchronous interrupts.
If the CPU completed the SIE instruction and the TM instruction of
the LPP macro at the time it receives an interrupt, the interrupt
handler will run while the LPP, the ASCE and the SIE bit are still
set up for guest execution. This might result in wrong sampling data,
but it will not cause data corruption or lockups.

The critical section in sie64a needs to be enlarged to include all
instructions that undo the changes required for guest execution.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-07-22 09:58:03 +02:00
..
vdso32 s390/vdso: fix stack corruption 2014-10-27 13:27:02 +01:00
vdso64 s390/vdso: fix clock_gettime for CLOCK_THREAD_CPUTIME_ID, -2 and -3 2015-02-12 09:37:21 +01:00
.gitignore s390: add various .gitignore files. 2012-05-16 14:42:41 +02:00
asm-offsets.c s390/kernel: lazy restore fpu registers 2015-07-22 09:58:01 +02:00
audit.c [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
audit.h [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
base.S s390/kdump: fix nosmt kernel parameter 2015-06-25 09:39:26 +02:00
cache.c s390/cacheinfo: add missing facility check 2015-04-13 10:46:16 +02:00
compat_audit.c [S390] Get rid of a bunch of sparse warnings again. 2007-10-12 16:13:06 +02:00
compat_linux.c groups: Consolidate the setgroups permission checks 2014-12-05 17:19:27 -06:00
compat_linux.h s390: add support for vector extension 2014-10-09 09:14:13 +02:00
compat_ptrace.h [S390] ptrace cleanup 2011-01-05 12:47:31 +01:00
compat_signal.c s390/kernel: lazy restore fpu registers 2015-07-22 09:58:01 +02:00
compat_wrapper.c clone: support passing tls argument via C rather than pt_regs magic 2015-06-25 17:00:38 -07:00
cpcmd.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
crash_dump.c s390/kdump: fix nosmt kernel parameter 2015-06-25 09:39:26 +02:00
debug.c s390: time: Provide read_boot_clock64() and read_persistent_clock64() 2015-05-22 10:36:29 -07:00
diag.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
dis.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
dumpstack.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
early.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
ebcdic.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
entry.h s390/signal: add sys_sigreturn and sys_rt_sigreturn declarations 2015-01-08 10:02:49 +01:00
entry.S s390/kvm: fix interrupt race with HANDLE_SIE_INTERCEPT 2015-07-22 09:58:03 +02:00
ftrace.c s390/maccess: remove potentially broken probe_kernel_write() 2015-03-25 11:49:43 +01:00
head64.S s390: fix kernel crash due to linkage stack instructions 2014-02-05 11:00:50 +01:00
head_kdump.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
head.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
idle.c s390/idle: convert open coded idle time seqcount 2014-12-08 09:42:32 +01:00
ipl.c s390/ipl: cleanup macro usage 2015-03-25 11:49:50 +01:00
irq.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-04-15 09:00:47 -07:00
jump_label.c s390/maccess: remove potentially broken probe_kernel_write() 2015-03-25 11:49:43 +01:00
kprobes.c s390/maccess: remove potentially broken probe_kernel_write() 2015-03-25 11:49:43 +01:00
lgr.c s390/sysinfo,stsi: change return code handling 2012-09-26 15:45:12 +02:00
machine_kexec.c s390: add SMT support 2015-01-22 12:16:01 +01:00
Makefile s390: remove "64" suffix from mem64.S and swsusp_asm64.S 2015-03-25 11:49:51 +01:00
mcount.S s390/ftrace: hotpatch support for function tracing 2015-01-29 09:19:25 +01:00
module.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
nmi.c s390/kernel: lazy restore fpu registers 2015-07-22 09:58:01 +02:00
os_info.c Include missing linux/slab.h inclusions 2013-04-29 15:42:01 -04:00
perf_cpum_cf_events.c s390/cpum_cf: Export event names in sysfs 2013-12-16 14:37:50 +01:00
perf_cpum_cf.c s390: Replace __get_cpu_var uses 2014-08-26 13:45:52 -04:00
perf_cpum_sf.c kernel/params: constify struct kernel_param_ops uses 2015-05-28 11:32:10 +09:30
perf_event.c s390/perf: make print_debug_cf() static 2014-03-14 12:59:32 +01:00
pgm_check.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
process.c s390/kernel: lazy restore fpu registers 2015-07-22 09:58:01 +02:00
processor.c s390/module: enable generic CPU feature modalias using s390 ELF hwcaps 2015-07-22 09:58:02 +02:00
ptrace.c s390/kernel: lazy restore fpu registers 2015-07-22 09:58:01 +02:00
reipl.S s390: remove "64" suffix from a couple of files 2015-03-25 11:49:34 +01:00
relocate_kernel.S s390: remove "64" suffix from a couple of files 2015-03-25 11:49:34 +01:00
runtime_instr.c s390/irq: Use defines for external interruption codes 2014-04-03 14:30:52 +02:00
s390_ksyms.c s390/kernel: lazy restore fpu registers 2015-07-22 09:58:01 +02:00
sclp.S s390/sclp: clear upper register halves in _sclp_print_early 2015-07-07 09:28:29 +02:00
setup.c s390/module: enable generic CPU feature modalias using s390 ELF hwcaps 2015-07-22 09:58:02 +02:00
signal.c s390/kernel: lazy restore fpu registers 2015-07-22 09:58:01 +02:00
smp.c s390/kdump: fix compile for !SMP 2015-06-29 10:13:11 +02:00
stacktrace.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
suspend.c PCI: Include <linux/pci.h>, not <asm/pci.h> 2015-06-08 07:55:03 -05:00
swsusp.S s390: remove "64" suffix from mem64.S and swsusp_asm64.S 2015-03-25 11:49:51 +01:00
sys_s390.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
syscalls.S s390: remove 31 bit syscalls 2015-03-25 11:49:35 +01:00
sysinfo.c Fairly small update, but there are some interesting new features. 2015-02-13 09:55:09 -08:00
time.c s390: time: Provide read_boot_clock64() and read_persistent_clock64() 2015-05-22 10:36:29 -07:00
topology.c s390: make couple of functions and variables static 2015-03-25 11:49:45 +01:00
traps.c s390/kernel: lazy restore fpu registers 2015-07-22 09:58:01 +02:00
uprobes.c s390/uprobes: fix address space annotation 2015-03-25 11:49:47 +01:00
vdso.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
vmlinux.lds.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
vtime.c s390: add SMT support 2015-01-22 12:16:01 +01:00