[PATCH v2 8/8] ARCv2: perf: Finally introduce HS perf unit
From: Alexey Brodkin <hidden>
Date: 2015-08-05 15:14:29
Also in:
lkml
Subsystem:
open firmware and flattened device tree bindings, performance events subsystem, synopsys arc architecture, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Vineet Gupta, Linus Torvalds
From: Vineet Gupta <redacted> With all features in place, the ARC HS pct block can now be effectively allowed to be probed/used Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Signed-off-by: Vineet Gupta <redacted> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> --- Compared to v1: [1] MAINTAINERS file updated to cover new file. Documentation/devicetree/bindings/arc/archs-pct.txt | 17 +++++++++++++++++ MAINTAINERS | 2 +- arch/arc/include/asm/perf_event.h | 5 ++++- arch/arc/kernel/perf_event.c | 3 ++- 4 files changed, 24 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/arc/archs-pct.txt
diff --git a/Documentation/devicetree/bindings/arc/archs-pct.txt b/Documentation/devicetree/bindings/arc/archs-pct.txt
new file mode 100644
index 0000000..1ae98b8
--- /dev/null
+++ b/Documentation/devicetree/bindings/arc/archs-pct.txt@@ -0,0 +1,17 @@ +* ARC HS Performance Counters + +The ARC HS can be configured with a pipeline performance monitor for counting +CPU and cache events like cache misses and hits. Like conventional PCT there +are 100+ hardware conditions dynamically mapped to upto 32 counters. +It also supports overflow interrupts. + +Required properties: + +- compatible : should contain + "snps,archs-pct" + +Example: + +pmu { + compatible = "snps,archs-pct"; +};
diff --git a/MAINTAINERS b/MAINTAINERS
index a226416..ec9e729 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS@@ -9865,7 +9865,7 @@ SYNOPSYS ARC ARCHITECTURE M: Vineet Gupta <vgupta@synopsys.com> S: Supported F: arch/arc/ -F: Documentation/devicetree/bindings/arc/ +F: Documentation/devicetree/bindings/arc/* F: drivers/tty/serial/arc_uart.c SYNOPSYS ARC SDP platform support
diff --git a/arch/arc/include/asm/perf_event.h b/arch/arc/include/asm/perf_event.h
index e915c0d..e4d7587 100644
--- a/arch/arc/include/asm/perf_event.h
+++ b/arch/arc/include/asm/perf_event.h@@ -108,8 +108,11 @@ static const char * const arc_pmu_ev_hw_map[] = { [PERF_COUNT_HW_INSTRUCTIONS] = "iall", [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmp", [PERF_COUNT_ARC_BPOK] = "bpok", /* NP-NT, PT-T, PNT-NT */ +#ifdef CONFIG_ISA_ARCV2 + [PERF_COUNT_HW_BRANCH_MISSES] = "bpmp", +#else [PERF_COUNT_HW_BRANCH_MISSES] = "bpfail", /* NP-T, PT-NT, PNT-T */ - +#endif [PERF_COUNT_ARC_LDC] = "imemrdc", /* Instr: mem read cached */ [PERF_COUNT_ARC_STC] = "imemwrc", /* Instr: mem write cached */
diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index 008fa58..d1dba1c 100644
--- a/arch/arc/kernel/perf_event.c
+++ b/arch/arc/kernel/perf_event.c@@ -606,6 +606,7 @@ static int arc_pmu_device_probe(struct platform_device *pdev) #ifdef CONFIG_OF static const struct of_device_id arc_pmu_match[] = { { .compatible = "snps,arc700-pct" }, + { .compatible = "snps,archs-pct" }, {}, }; MODULE_DEVICE_TABLE(of, arc_pmu_match);
@@ -613,7 +614,7 @@ MODULE_DEVICE_TABLE(of, arc_pmu_match); static struct platform_driver arc_pmu_driver = { .driver = { - .name = "arc700-pct", + .name = "arc-pct", .of_match_table = of_match_ptr(arc_pmu_match), }, .probe = arc_pmu_device_probe,
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2.4.3