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authorHendrik Brueckner <brueckner@linux.vnet.ibm.com>2012-10-15 14:31:29 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-10-18 17:50:09 +0200
commitf47586b24c43adadd19c7e3f532a601d6eed728d (patch)
tree673cd36fc6198d3d4f3a9bd0383b171974d94ad7 /arch/s390
parentcec8546638dc634824b629e33968d6c68f8b07d6 (diff)
downloadop-kernel-dev-f47586b24c43adadd19c7e3f532a601d6eed728d.zip
op-kernel-dev-f47586b24c43adadd19c7e3f532a601d6eed728d.tar.gz
perf_cpum_cf: Add support for counters available with IBM zEC12
Increase the maximum number of available counters and check if the hardware supports the counter. Support is indicated by the version of the CPU-measurement counter facility. 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/include/asm/perf_event.h2
-rw-r--r--arch/s390/kernel/perf_cpum_cf.c6
2 files changed, 6 insertions, 2 deletions
diff --git a/arch/s390/include/asm/perf_event.h b/arch/s390/include/asm/perf_event.h
index 7941968..5f0173a 100644
--- a/arch/s390/include/asm/perf_event.h
+++ b/arch/s390/include/asm/perf_event.h
@@ -9,7 +9,7 @@
#include <asm/cpu_mf.h>
/* CPU-measurement counter facility */
-#define PERF_CPUM_CF_MAX_CTR 160
+#define PERF_CPUM_CF_MAX_CTR 256
/* Per-CPU flags for PMU states */
#define PMU_F_RESERVED 0x1000
diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index 9871b19..c4e7269 100644
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -94,7 +94,7 @@ static int get_counter_set(u64 event)
set = CPUMF_CTR_SET_USER;
else if (event < 128)
set = CPUMF_CTR_SET_CRYPTO;
- else if (event < 160)
+ else if (event < 256)
set = CPUMF_CTR_SET_EXT;
return set;
@@ -138,6 +138,10 @@ static int validate_ctr_version(const struct hw_perf_event *hwc)
case CPUMF_CTR_SET_EXT:
if (cpuhw->info.csvn < 1)
err = -EOPNOTSUPP;
+ if ((cpuhw->info.csvn == 1 && hwc->config > 159) ||
+ (cpuhw->info.csvn == 2 && hwc->config > 175) ||
+ (cpuhw->info.csvn > 2 && hwc->config > 255))
+ err = -EOPNOTSUPP;
break;
}
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