s390/cpum_cf: update counter numbers to ecctr limits

Use the highest counter number that can be specified for the
ecctr (extract CPU counter) instruction for perf.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/include/asm/perf_event.h b/arch/s390/include/asm/perf_event.h
index c64c0be..dd32beb 100644 (file)
--- a/arch/s390/include/asm/perf_event.h
+++ b/arch/s390/include/asm/perf_event.h
@@ -1,7 +1,7 @@
 /*
  * Performance event support - s390 specific definitions.
  *
- * Copyright IBM Corp. 2009, 2013
+ * Copyright IBM Corp. 2009, 2017
  * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
  *           Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
  */
@@ -47,7 +47,7 @@ struct perf_sf_sde_regs {
 };
 
 /* Perf PMU definitions for the counter facility */
-#define PERF_CPUM_CF_MAX_CTR           256
+#define PERF_CPUM_CF_MAX_CTR           0xffffUL  /* Max ctr for ECCTR */
 
 /* Perf PMU definitions for the sampling facility */
 #define PERF_CPUM_SF_MAX_CTR           2

diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index 1aba10e..1c3f938 100644 (file)
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -370,7 +370,7 @@ static int __hw_perf_event_init(struct perf_event *event)
        if (ev == -1)
                return -ENOENT;
 
-       if (ev >= PERF_CPUM_CF_MAX_CTR)
+       if (ev > PERF_CPUM_CF_MAX_CTR)
                return -EINVAL;
 
        /* Use the hardware perf event structure to store the counter number