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selftests/powerpc/pmu: Add support for perf sampling tests

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Add support functions for enabling perf sampling test in a new folder
"sampling_tests" under "selftests/powerpc/pmu". This includes support
functions for allocating and processing the mmap buffer. These functions
are added/defined in "sampling_tests/misc.*" files.

Also updates the corresponding Makefiles in "selftests/powerpc" and
"sampling_tests" folder.

Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
[mpe: Drop unneeded bits from the Makefile]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220127072012.662451-3-kjain@linux.ibm.com
This commit is contained in:
Athira Rajeev
2022-01-27 12:49:54 +05:30
committed by Michael Ellerman
parent f961e20f15
commit c315669e2f
4 changed files with 130 additions and 2 deletions
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9
tools/testing/selftests/powerpc/pmu/sampling_tests/misc.h Normal file
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@@ -0,0 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright 2022, Athira Rajeev, IBM Corp.
*/
#include "../event.h"
void *event_sample_buf_mmap(int fd, int mmap_pages);
void *__event_read_samples(void *sample_buff, size_t *size, u64 *sample_count);