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10ad34bc76
linux/arch/s390/kernel
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Martin Schwidefsky 10ad34bc76 s390: add SMT support 
The multi-threading facility is introduced with the z13 processor family.
This patch adds code to detect the multi-threading facility. With the
facility enabled each core will surface multiple hardware threads to the
system. Each hardware threads looks like a normal CPU to the operating
system with all its registers and properties.

The SCLP interface reports the SMT topology indirectly via the maximum
thread id. Each reported CPU in the result of a read-scp-information
is a core representing a number of hardware threads.

To reflect the reduced CPU capacity if two hardware threads run on a
single core the MT utilization counter set is used to normalize the
raw cputime obtained by the CPU timer deltas. This scaled cputime is
reported via the taskstats interface. The normal /proc/stat numbers
are based on the raw cputime and are not affected by the normalization.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-01-22 12:16:01 +01:00
..
vdso32 s390/vdso: fix stack corruption 2014-10-27 13:27:02 +01:00
vdso64 s390/vdso: fix stack corruption 2014-10-27 13:27:02 +01:00
.gitignore s390: add various .gitignore files. 2012-05-16 14:42:41 +02:00
asm-offsets.c s390/cmpxchg: use compiler builtins 2014-11-03 13:29:47 +01:00
audit.c
audit.h
base.S s390: add SMT support 2015-01-22 12:16:01 +01:00
cache.c s390: move cacheinfo sysfs to generic cacheinfo infrastructure 2015-01-08 10:02:54 +01:00
compat_audit.c
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/signal: add sparse annotations 2014-11-03 13:30:36 +01:00
compat_wrapper.c s390/kernel: add system calls for PCI memory access 2014-11-19 09:46:43 +01:00
cpcmd.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
crash_dump.c s390/kdump: add support for vector extension 2014-10-09 09:14:16 +02:00
debug.c s390/debug: avoid function call for debug_sprintf_* 2014-12-08 09:42:29 +01:00
diag.c [S390] replace diag10() with diag10_range() function 2011-05-10 17:13:43 +02:00
dis.c s390: add SMT support 2015-01-22 12:16:01 +01:00
dumpstack.c s390/traps: print interrupt code and instruction length code 2014-11-21 08:49:30 +01:00
early.c s390/ftrace,kprobes: allow to patch first instruction 2014-10-27 13:27:27 +01:00
ebcdic.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
entry64.S s390: use local symbol names in entry[64].S 2014-12-08 09:42:38 +01:00
entry.h s390/signal: add sys_sigreturn and sys_rt_sigreturn declarations 2015-01-08 10:02:49 +01:00
entry.S s390: use local symbol names in entry[64].S 2014-12-08 09:42:38 +01:00
ftrace.c s390/ftrace: add code replacement sanity checks 2015-01-08 10:02:46 +01:00
head31.S s390/mm: Convert bootmem to memblock 2014-05-20 08:58:40 +02:00
head64.S s390: fix kernel crash due to linkage stack instructions 2014-02-05 11:00:50 +01:00
head_kdump.S s390/kdump: Use 64 bit mode for 0x10000 entry point 2012-10-18 17:50:09 +02:00
head.S s390: add z13 code generation support 2015-01-22 12:15:57 +01:00
idle.c s390/idle: convert open coded idle time seqcount 2014-12-08 09:42:32 +01:00
ipl.c s390: add SMT support 2015-01-22 12:16:01 +01:00
irq.c s390/irq: use irq 0 2014-11-18 18:23:03 +01:00
jump_label.c s390/jump-label: add arch_jump_label_transform_static() 2011-10-25 11:54:37 -07:00
kprobes.c s390/kprobes: fix instruction copy for out of line execution 2014-12-01 11:07:44 +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/ftrace: remove 31 bit ftrace support 2014-10-09 09:14:18 +02:00
mcount.S s390/ftrace,kprobes: allow to patch first instruction 2014-10-27 13:27:27 +01:00
module.c mm/arch: use NUMA_NO_NODE 2013-11-13 12:09:05 +09:00
nmi.c s390: fix machine check handling 2014-12-01 11:06:55 +01:00
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 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-12-11 17:30:55 -08:00
perf_event.c s390/perf: make print_debug_cf() static 2014-03-14 12:59:32 +01:00
pgm_check.S s390: add support for vector extension 2014-10-09 09:14:13 +02:00
process.c s390: avoid z13 cache aliasing 2015-01-22 12:15:59 +01:00
processor.c Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
ptrace.c s390/ptrace: always include vector registers in core files 2014-12-08 09:42:37 +01:00
reipl64.S s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
reipl.S s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
relocate_kernel64.S s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
relocate_kernel.S s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
runtime_instr.c s390/irq: Use defines for external interruption codes 2014-04-03 14:30:52 +02:00
s390_ksyms.c s390: use IS_ENABLED to check if a CONFIG is set to y or m 2013-12-16 14:38:04 +01:00
sclp.S s390/sclp: sign extend return value of _sclp_print_early() 2015-01-08 10:02:52 +01:00
setup.c s390: add z13 code generation support 2015-01-22 12:15:57 +01:00
signal.c s390/signal: add sparse annotations 2014-11-03 13:30:36 +01:00
smp.c s390: add SMT support 2015-01-22 12:16:01 +01:00
stacktrace.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
suspend.c nosave: consolidate __nosave_{begin,end} in <asm/sections.h> 2014-10-09 22:26:04 -04:00
swsusp_asm64.S s390/hibernate: add early resume function 2013-08-30 08:57:15 +02:00
sys_s390.c teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long 2013-03-03 22:46:22 -05:00
syscalls.S s390: wire up execveat syscall 2014-12-18 13:37:17 +01:00
sysinfo.c s390: add SMT support 2015-01-22 12:16:01 +01:00
time.c s390/kprobes: make use of NOKPROBE_SYMBOL() 2014-10-27 13:27:28 +01:00
topology.c s390: add SMT support 2015-01-22 12:16:01 +01:00
traps.c s390/traps: die on translation exceptions 2014-11-21 08:49:33 +01:00
uprobes.c s390/uprobes: fix kprobes dependency 2014-10-17 14:45:51 +02:00
vdso.c arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 2014-08-08 15:57:27 -07:00
vmlinux.lds.S s390/linker skript: discard exit.data at runtime 2013-02-14 15:55:21 +01:00
vtime.c s390: add SMT support 2015-01-22 12:16:01 +01:00