linux/arch/s390
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
..
appldata s390: appldata: drop owner assignment from platform_drivers 2014-10-20 16:20:13 +02:00
boot s390/sclp: fix declaration of _sclp_print_early() 2015-01-08 10:02:51 +01:00
configs s390: update default configuration 2014-10-27 13:27:03 +01:00
crypto s390/crypto: remove 'const' to avoid compiler warnings 2015-01-08 10:02:53 +01:00
hypfs s390/timex: fix get_tod_clock_ext() inline assembly 2015-01-07 09:52:47 +01:00
include s390: add SMT support 2015-01-22 12:16:01 +01:00
kernel s390: add SMT support 2015-01-22 12:16:01 +01:00
kvm s390/mm: disable KSM for storage key enabled pages 2014-10-27 13:27:26 +01:00
lib s390/uprobes: fix kprobes dependency 2014-10-17 14:45:51 +02:00
math-emu s390: fix save and restore of the floating-point-control register 2013-10-24 17:17:11 +02:00
mm s390: avoid z13 cache aliasing 2015-01-22 12:15:59 +01:00
net net: filter: constify detection of pkt_type_offset 2014-09-13 17:07:21 -04:00
oprofile s390: Replace __get_cpu_var uses 2014-08-26 13:45:52 -04:00
pci s390/pci: add missing address space annotation 2015-01-08 10:02:47 +01:00
defconfig s390: update default configuration 2014-10-27 13:27:03 +01:00
Kbuild s390/pci: base support 2012-11-30 15:40:45 +01:00
Kconfig s390: add SMT support 2015-01-22 12:16:01 +01:00
Kconfig.debug Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS 2013-04-30 17:04:09 -07:00
Makefile s390: add z13 code generation support 2015-01-22 12:15:57 +01:00