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authorHendrik Brueckner <brueckner@linux.vnet.ibm.com>2013-12-13 12:38:39 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-12-16 14:37:53 +0100
commit99c64b6679c41d8238b154c1a462724d7101765c (patch)
treed30d5f0cf1b3373a1989fcac2ebeb44804668a56 /arch/s390/kernel/perf_event.c
parente28bb79d9935293a8eea5f3c771fde89db645ba7 (diff)
s390/perf: Add service level information for CPU-Measurement Facilities
Register a service level handler to report information about available CPU-Measurement facilities. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/perf_event.c')
-rw-r--r--arch/s390/kernel/perf_event.c58
1 files changed, 57 insertions, 1 deletions
diff --git a/arch/s390/kernel/perf_event.c b/arch/s390/kernel/perf_event.c
index 4edcdfa4894e..3bd2bf030ad4 100644
--- a/arch/s390/kernel/perf_event.c
+++ b/arch/s390/kernel/perf_event.c
@@ -16,17 +16,19 @@
#include <linux/kvm_host.h>
#include <linux/percpu.h>
#include <linux/export.h>
+#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/sysfs.h>
#include <asm/irq.h>
#include <asm/cpu_mf.h>
#include <asm/lowcore.h>
#include <asm/processor.h>
+#include <asm/sysinfo.h>
const char *perf_pmu_name(void)
{
if (cpum_cf_avail() || cpum_sf_avail())
- return "CPU-measurement facilities (CPUMF)";
+ return "CPU-Measurement Facilities (CPU-MF)";
return "pmu";
}
EXPORT_SYMBOL(perf_pmu_name);
@@ -138,6 +140,60 @@ void perf_event_print_debug(void)
local_irq_restore(flags);
}
+/* Service level infrastructure */
+static void sl_print_counter(struct seq_file *m)
+{
+ struct cpumf_ctr_info ci;
+
+ memset(&ci, 0, sizeof(ci));
+ if (qctri(&ci))
+ return;
+
+ seq_printf(m, "CPU-MF: Counter facility: version=%u.%u "
+ "authorization=%04x\n", ci.cfvn, ci.csvn, ci.auth_ctl);
+}
+
+static void sl_print_sampling(struct seq_file *m)
+{
+ struct hws_qsi_info_block si;
+
+ memset(&si, 0, sizeof(si));
+ if (qsi(&si))
+ return;
+
+ if (!si.as && !si.ad)
+ return;
+
+ seq_printf(m, "CPU-MF: Sampling facility: min_rate=%lu max_rate=%lu"
+ " cpu_speed=%u\n", si.min_sampl_rate, si.max_sampl_rate,
+ si.cpu_speed);
+ if (si.as)
+ seq_printf(m, "CPU-MF: Sampling facility: mode=basic"
+ " sample_size=%u\n", si.bsdes);
+ if (si.ad)
+ seq_printf(m, "CPU-MF: Sampling facility: mode=diagnostic"
+ " sample_size=%u\n", si.dsdes);
+}
+
+static void service_level_perf_print(struct seq_file *m,
+ struct service_level *sl)
+{
+ if (cpum_cf_avail())
+ sl_print_counter(m);
+ if (cpum_sf_avail())
+ sl_print_sampling(m);
+}
+
+static struct service_level service_level_perf = {
+ .seq_print = service_level_perf_print,
+};
+
+static int __init service_level_perf_register(void)
+{
+ return register_service_level(&service_level_perf);
+}
+arch_initcall(service_level_perf_register);
+
/* See also arch/s390/kernel/traps.c */
static unsigned long __store_trace(struct perf_callchain_entry *entry,
unsigned long sp,