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| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2015-03-09 19:34:18 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-03-13 14:15:44 +0300 |
| commit | 0a64815091bd0ad6c6cdfaac2fae55b0f3ecf974 (patch) | |
| tree | e9e3b7cc479cf77b9264a1a22b2668f98a0ae062 /arch/s390 | |
| parent | c202baf017aea0c860e53131bc55bb1af7177e76 (diff) | |
| download | linux-0a64815091bd0ad6c6cdfaac2fae55b0f3ecf974.tar.xz | |
s390/cpum_sf: add diagnostic sampling event only if it is authorized
The SF_CYCLES_BASIC_DIAG is always registered even if it is turned of in the
current hardware configuration. Because diagnostic-sampling is typically not
turned on in the hardware configuration, do not register this perf event by
default. Enable it only if the diagnostic-sampling function is authorized.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/perf_cpum_sf.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c index c3f8d157cb0d..e6a1578fc000 100644 --- a/arch/s390/kernel/perf_cpum_sf.c +++ b/arch/s390/kernel/perf_cpum_sf.c @@ -1415,7 +1415,7 @@ CPUMF_EVENT_ATTR(SF, SF_CYCLES_BASIC_DIAG, PERF_EVENT_CPUM_SF_DIAG); static struct attribute *cpumsf_pmu_events_attr[] = { CPUMF_EVENT_PTR(SF, SF_CYCLES_BASIC), - CPUMF_EVENT_PTR(SF, SF_CYCLES_BASIC_DIAG), + NULL, NULL, }; @@ -1606,8 +1606,11 @@ static int __init init_cpum_sampling_pmu(void) return -EINVAL; } - if (si.ad) + if (si.ad) { sfb_set_limits(CPUM_SF_MIN_SDB, CPUM_SF_MAX_SDB); + cpumsf_pmu_events_attr[1] = + CPUMF_EVENT_PTR(SF, SF_CYCLES_BASIC_DIAG); + } sfdbg = debug_register(KMSG_COMPONENT, 2, 1, 80); if (!sfdbg) |