perf tests: Add a test for the ARM 32-bit [vectors] page (21327c78) · Commits · 戴 / test

perf on ARM requires CONFIG_KUSER_HELPERS to be turned on to allow some independance with respect to the ARM CPU being used. Add a test which tries to locate the [vectors] page, created when CONFIG_KUSER_HELPERS is turned on to help asses the system's health. Signed-off-by:

Florian Fainelli <f.fainelli@gmail.com> Acked-by:

Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Chris Healy <cphealy@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Kim Phillips <kim.phillips@arm.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Thomas Richter <tmricht@linux.ibm.com> Link: http://lkml.kernel.org/r/20181221034337.26663-3-f.fainelli@gmail.com Signed-off-by:

Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/arch/arm/tests/Build

+1 −0

Original line number	Diff line number	Diff line
		libperf-y += regs_load.o
		libperf-y += dwarf-unwind.o
		libperf-y += vectors-page.o

		libperf-y += arch-tests.o

tools/perf/arch/arm/tests/arch-tests.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -10,6 +10,10 @@ struct test arch_tests[] = {
		.func = test__dwarf_unwind,
		},
		#endif
		{
		.desc = "Vectors page",
		.func = test__vectors_page,
		},
		{
		.func = NULL,
		},

tools/perf/arch/arm/tests/vectors-page.c

0 → 100644

+24 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		#include <stdio.h>
		#include <string.h>
		#include <linux/compiler.h>

		#include "debug.h"
		#include "tests/tests.h"
		#include "util/find-map.c"

		#define VECTORS__MAP_NAME "[vectors]"

		int test__vectors_page(struct test *test __maybe_unused,
		int subtest __maybe_unused)
		{
		void start, end;

		if (find_map(&start, &end, VECTORS__MAP_NAME)) {
		pr_err("%s not found, is CONFIG_KUSER_HELPERS enabled?\n",
		VECTORS__MAP_NAME);
		return TEST_FAIL;
		}

		return TEST_OK;
		}

tools/perf/tests/tests.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -119,4 +119,9 @@ int test__arch_unwind_sample(struct perf_sample *sample,
		struct thread *thread);
		#endif
		#endif

		#if defined(__arm__)
		int test__vectors_page(struct test *test, int subtest);
		#endif

		#endif /* TESTS_H */

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