arm: perf: clean up PMU names

The perf userspace tools can't handle dashes or spaces in PMU names,
which conflicts with the current naming scheme in the arm perf backend.
This prevents these PMUs from being accessed by name from the perf
tools. Additionally the ARMv6 pmus are named "v6", which does not fully
distinguish them in the sys/bus/event_source namespace.

This patch renames the PMUs consistently to a lower case form with
underscores, e.g. "armv6_1176", "armv7_cortex_a9". This is both readily
accepted by today's perf tool, and far easier to type than the
(apparently unused) convention in use previously. The OProfile name
conversion code is updated to handle this.

Due to a copy-paste error involving two "xscale1" entries, "xscale2" has
never been matched by the name OProfile name mapping. While we're
updating names, this is corrected.

Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
[sachin: fixed missing semicolons in armv6 backend]
Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 32 insertions, 4 deletions

diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c
index 0fd4290f911f..abfeb04f3213 100644
--- a/arch/arm/kernel/perf_event_v6.c
+++ b/arch/arm/kernel/perf_event_v6.c
@@ -476,9 +476,8 @@ static int armv6_map_event(struct perf_event *event)
 				&armv6_perf_cache_map, 0xFF);
 }
 
-static int armv6pmu_init(struct arm_pmu *cpu_pmu)
+static void armv6pmu_init(struct arm_pmu *cpu_pmu)
 {
-	cpu_pmu->name		= "v6";
 	cpu_pmu->handle_irq	= armv6pmu_handle_irq;
 	cpu_pmu->enable		= armv6pmu_enable_event;
 	cpu_pmu->disable	= armv6pmu_disable_event;
@@ -490,7 +489,26 @@ static int armv6pmu_init(struct arm_pmu *cpu_pmu)
 	cpu_pmu->map_event	= armv6_map_event;
 	cpu_pmu->num_events	= 3;
 	cpu_pmu->max_period	= (1LLU << 32) - 1;
+}
+
+static int armv6_1136_pmu_init(struct arm_pmu *cpu_pmu)
+{
+	armv6pmu_init(cpu_pmu);
+	cpu_pmu->name		= "armv6_1136";
+	return 0;
+}
+
+static int armv6_1156_pmu_init(struct arm_pmu *cpu_pmu)
+{
+	armv6pmu_init(cpu_pmu);
+	cpu_pmu->name		= "armv6_1156";
+	return 0;
+}
 
+static int armv6_1176_pmu_init(struct arm_pmu *cpu_pmu)
+{
+	armv6pmu_init(cpu_pmu);
+	cpu_pmu->name		= "armv6_1176";
 	return 0;
 }
 
@@ -510,7 +528,7 @@ static int armv6mpcore_map_event(struct perf_event *event)
 
 static int armv6mpcore_pmu_init(struct arm_pmu *cpu_pmu)
 {
-	cpu_pmu->name		= "v6mpcore";
+	cpu_pmu->name		= "armv6_11mpcore";
 	cpu_pmu->handle_irq	= armv6pmu_handle_irq;
 	cpu_pmu->enable		= armv6pmu_enable_event;
 	cpu_pmu->disable	= armv6mpcore_pmu_disable_event;
@@ -526,7 +544,17 @@ static int armv6mpcore_pmu_init(struct arm_pmu *cpu_pmu)
 	return 0;
 }
 #else
-static int armv6pmu_init(struct arm_pmu *cpu_pmu)
+static int armv6_1136_pmu_init(struct arm_pmu *cpu_pmu)
+{
+	return -ENODEV;
+}
+
+static int armv6_1156_pmu_init(struct arm_pmu *cpu_pmu)
+{
+	return -ENODEV;
+}
+
+static int armv6_1176_pmu_init(struct arm_pmu *cpu_pmu)
 {
 	return -ENODEV;
 }