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authorHendrik Brueckner <brueckner@linux.vnet.ibm.com>2015-03-09 19:34:18 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-03-13 14:15:44 +0300
commit0a64815091bd0ad6c6cdfaac2fae55b0f3ecf974 (patch)
treee9e3b7cc479cf77b9264a1a22b2668f98a0ae062 /arch/s390
parentc202baf017aea0c860e53131bc55bb1af7177e76 (diff)
downloadlinux-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.c7
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)