Hendrik Brueckner 9254e70c4e s390/cpum_cf: use perf software context for hardware counters ...

On s390, there are two different hardware PMUs for counting and
sampling.  Previously, both PMUs have shared the perf_hw_context
which is not correct and, recently, results in this warning:

    ------------[ cut here ]------------
    WARNING: CPU: 5 PID: 1 at kernel/events/core.c:8485 perf_pmu_register+0x420/0x428
    Modules linked in:
    CPU: 5 PID: 1 Comm: swapper/0 Not tainted 4.7.0-rc1+ #2
    task: 00000009c5240000 ti: 00000009c5234000 task.ti: 00000009c5234000
    Krnl PSW : 0704c00180000000 0000000000220c50 (perf_pmu_register+0x420/0x428)
               R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3
    Krnl GPRS: ffffffffffffffff 0000000000b15ac6 0000000000000000 00000009cb440000
               000000000022087a 0000000000000000 0000000000b78fa0 0000000000000000
               0000000000a9aa90 0000000000000084 0000000000000005 000000000088a97a
               0000000000000004 0000000000749dd0 000000000022087a 00000009c5237cc0
    Krnl Code: 0000000000220c44: a7f4ff54            brc     15,220aec
               0000000000220c48: 92011000           mvi     0(%r1),1
              #0000000000220c4c: a7f40001           brc     15,220c4e
              >0000000000220c50: a7f4ff12           brc     15,220a74
               0000000000220c54: 0707               bcr     0,%r7
               0000000000220c56: 0707               bcr     0,%r7
               0000000000220c58: ebdff0800024       stmg    %r13,%r15,128(%r15)
               0000000000220c5e: a7f13fe0           tmll    %r15,16352
    Call Trace:
    ([<000000000022087a>] perf_pmu_register+0x4a/0x428)
    ([<0000000000b2c25c>] init_cpum_sampling_pmu+0x14c/0x1f8)
    ([<0000000000100248>] do_one_initcall+0x48/0x140)
    ([<0000000000b25d26>] kernel_init_freeable+0x1e6/0x2a0)
    ([<000000000072bda4>] kernel_init+0x24/0x138)
    ([<000000000073495e>] kernel_thread_starter+0x6/0xc)
    ([<0000000000734958>] kernel_thread_starter+0x0/0xc)
    Last Breaking-Event-Address:
     [<0000000000220c4c>] perf_pmu_register+0x41c/0x428
    ---[ end trace 0c6ef9f5b771ad97 ]---

Using the perf_sw_context is an option because the cpum_cf PMU does
not use interrupts.  To make this more clear, initialize the
capabilities in the PMU structure.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2016-06-16 12:08:49 +02:00

..

vdso32

s390/vdso: optimize getcpu system call

2016-01-11 13:01:24 +01:00

vdso64

s390/vdso: optimize getcpu system call

2016-01-11 13:01:24 +01:00

.gitignore

s390: add various .gitignore files.

2012-05-16 14:42:41 +02:00

asm-offsets.c

s390/mm: split arch/s390/mm/pgtable.c

2016-03-08 15:00:15 +01:00

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/cache: remove superfluous locking

2016-05-10 13:24:49 +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/compat: correct restore of high gprs on signal return

2016-02-22 09:29:35 +01:00

compat_wrapper.c

s390: wire up copy_file_range syscall

2016-01-19 12:14:02 +01:00

cpcmd.c

s390: Use pr_warn instead of pr_warning

2016-03-07 13:12:04 +01:00

crash_dump.c

s390: make couple of variables and functions static

2016-05-10 13:24:50 +02:00

debug.c

s390: Use pr_warn instead of pr_warning

2016-03-07 13:12:04 +01:00

diag.c

s390/diag: add a s390 prefix to the diagnose trace point

2015-11-09 09:10:47 +01:00

dis.c

s390/dis: use correct escape sequence for '%' character

2016-03-02 06:44:25 -06:00

dumpstack.c

s390/dumpstack: implement and use return_address()

2016-05-04 16:29:45 +02:00

early.c

locking/lockdep: Eliminate lockdep_init()

2016-02-09 12:03:25 +01:00

ebcdic.c

s390/comments: unify copyright messages and remove file names

2012-07-20 11:15:04 +02:00

entry.h

s390: add missing declarations

2016-05-10 13:24:51 +02:00

entry.S

s390: fix floating pointer register corruption (again)

2016-03-10 14:35:42 +01:00

ftrace.c

s390: remove all usages of PSW_ADDR_INSN

2016-01-19 12:14:03 +01:00

head64.S

s390/cpumf: Fix lpp detection

2016-03-08 10:38:06 +01:00

head_kdump.S

s390: remove 31 bit support

2015-03-25 11:49:33 +01:00

head.S

s390/facilities: make use of generated facility list

2015-12-18 14:59:21 +01:00

idle.c

s390/idle: convert open coded idle time seqcount

2014-12-08 09:42:32 +01:00

ipl.c

s390: remove all usages of PSW_ADDR_AMODE

2016-01-19 12:14:02 +01:00

irq.c

s390: add current_stack_pointer() helper function

2016-02-23 08:56:18 +01:00

jump_label.c

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-09-03 15:46:07 -07:00

kprobes.c

s390: remove all usages of PSW_ADDR_INSN

2016-01-19 12:14:03 +01:00

lgr.c

s390/sysinfo,stsi: change return code handling

2012-09-26 15:45:12 +02:00

machine_kexec.c

s390/kexec: consolidate crash_map/unmap_reserved_pages() and arch_kexec_protect(unprotect)_crashkres()

2016-05-23 17:04:14 -07:00

Makefile

s390: get rid of CONFIG_SCHED_MC and CONFIG_SCHED_BOOK

2015-12-30 10:34:57 +01:00

mcount.S

s390/ftrace: hotpatch support for function tracing

2015-01-29 09:19:25 +01:00

module.c

module: s390: keep mod_arch_specific for livepatch modules

2016-04-01 15:00:11 +02:00

nmi.c

s390/nmi: reduce size of percpu variable

2015-10-27 09:33:57 +01:00

os_info.c

s390/dump: streamline oldmem copy functions

2015-11-27 09:24:12 +01:00

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/cpum_cf: use perf software context for hardware counters

2016-06-16 12:08:49 +02:00

perf_cpum_sf.c

s390/cpum_sf: Remove superfluous SMP function call

2016-05-03 09:25:46 +02:00

perf_event.c

perf core: Pass max stack as a perf_callchain_entry context

2016-05-16 23:11:50 -03:00

pgm_check.S

s390: remove 31 bit support

2015-03-25 11:49:33 +01:00

process.c

exit_thread: accept a task parameter to be exited

2016-05-20 17:58:30 -07:00

processor.c

s390: add missing include statements

2016-05-10 13:24:52 +02:00

ptrace.c

s390: remove all usages of PSW_ADDR_INSN

2016-01-19 12:14:03 +01:00

reipl.S

s390/dump: rework CPU register dump code

2015-11-27 09:24:14 +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: remove runtime instrumentation interrupts

2015-11-03 14:40:51 +01:00

s390_ksyms.c

s390/fpu: split fpu-internal.h into fpu internals, api, and type headers

2015-10-16 09:41:12 +02:00

sclp.c

s390/sclp: Add VT220 support to early sclp console

2015-11-27 09:24:17 +01:00

setup.c

s390/fpu: allocate 'struct fpu' with the task_struct

2016-04-21 09:51:15 +02:00

signal.c

s390: remove all usages of PSW_ADDR_AMODE

2016-01-19 12:14:02 +01:00

smp.c

sched: Allow per-cpu kernel threads to run on online && !active

2016-05-06 14:58:22 +02:00

stacktrace.c

s390/dumpstack: merge all four stack tracers

2016-02-23 08:56:20 +01:00

suspend.c

PCI: Include <linux/pci.h>, not <asm/pci.h>

2015-06-08 07:55:03 -05:00

swsusp.S

s390/hibernate: fix save and restore of vector registers

2015-09-17 13:43:41 +02:00

sys_s390.c

s390: remove 31 bit support

2015-03-25 11:49:33 +01:00

syscalls.S

s390: wire up preadv2/pwritev2 syscalls

2016-04-01 08:42:38 +02:00

sysinfo.c

s390/sysinfo: add missing SYSIB 1.2.2 multithreading fields

2016-01-11 12:27:00 +01:00

time.c

param: convert some "on"/"off" users to strtobool

2016-03-17 15:09:34 -07:00

topology.c

param: convert some "on"/"off" users to strtobool

2016-03-17 15:09:34 -07:00

trace.c

s390/diag: avoid lockdep recursion

2016-02-11 13:05:56 +01:00

traps.c

s390/fault: merge report_user_fault implementations

2016-03-02 06:44:27 -06:00

uprobes.c

s390/uprobes: fix address space annotation

2015-03-25 11:49:47 +01:00

vdso.c

vdso: make arch_setup_additional_pages wait for mmap_sem for write killable

2016-05-23 17:04:14 -07:00

vmlinux.lds.S

arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections

2016-03-25 16:37:42 -07:00

vtime.c

s390: add missing declarations

2016-05-10 13:24:51 +02:00