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Commit 9b28829d authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARCv2: perf: Finally introduce HS perf unit 



With all features in place, the ARC HS pct block can now be effectively
allowed to be probed/used

Acked-by: default avatarPeter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: default avatarAlexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent e525c37f

Documentation/devicetree/bindings/arc/archs-pct.txt

0 → 100644
+17 −0
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* 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";

};

MAINTAINERS

+1 −1
Original line number Diff line number Diff line
@@ -9874,7 +9874,7 @@ 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

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc.git

arch/arc/include/asm/perf_event.h

+4 −1
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@@ -105,8 +105,11 @@ static const char * const arc_pmu_ev_hw_map[] = { 
	[PERF_COUNT_HW_INSTRUCTIONS] = "iall",

	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmp", /* Excludes ZOL jumps */

	[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 */

arch/arc/kernel/perf_event.c

+2 −1
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@@ -551,6 +551,7 @@ 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);
@@ -558,7 +559,7 @@ 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,