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selftests/powerpc/pmu: Add macros to parse event codes

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Each platform has raw event encoding format which specifies the bit
positions for different fields. The fields from event code gets
translated into performance monitoring mode control register (MMCRx)
settings. Patch add macros to extract individual fields from the event
code.

Add functions for sanity checks, since testcases currently are only
supported in power9 and power10.

Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
[mpe: Read PVR directly rather than using /proc/cpuinfo]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220127072012.662451-4-kjain@linux.ibm.com
This commit is contained in:
Madhavan Srinivasan
2022-01-27 12:49:55 +05:30
committed by Michael Ellerman
parent c315669e2f
commit 6523dce862
4 changed files with 172 additions and 2 deletions
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36
tools/testing/selftests/powerpc/pmu/sampling_tests/misc.h
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@@ -1,9 +1,45 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright 2022, Athira Rajeev, IBM Corp.
* Copyright 2022, Madhavan Srinivasan, IBM Corp.
*/
#include "../event.h"
#define POWER10 0x80
#define POWER9 0x4e
#define PERF_POWER9_MASK 0x7f8ffffffffffff
#define PERF_POWER10_MASK 0x7ffffffffffffff
extern int ev_mask_pmcxsel, ev_shift_pmcxsel;
extern int ev_mask_marked, ev_shift_marked;
extern int ev_mask_comb, ev_shift_comb;
extern int ev_mask_unit, ev_shift_unit;
extern int ev_mask_pmc, ev_shift_pmc;
extern int ev_mask_cache, ev_shift_cache;
extern int ev_mask_sample, ev_shift_sample;
extern int ev_mask_thd_sel, ev_shift_thd_sel;
extern int ev_mask_thd_start, ev_shift_thd_start;
extern int ev_mask_thd_stop, ev_shift_thd_stop;
extern int ev_mask_thd_cmp, ev_shift_thd_cmp;
extern int ev_mask_sm, ev_shift_sm;
extern int ev_mask_rsq, ev_shift_rsq;
extern int ev_mask_l2l3, ev_shift_l2l3;
extern int ev_mask_mmcr3_src, ev_shift_mmcr3_src;
extern int pvr;
extern u64 platform_extended_mask;
extern int check_pvr_for_sampling_tests(void);
/*
* Event code field extraction macro.
* Raw event code is combination of multiple
* fields. Macro to extract individual fields
*
* x - Raw event code value
* y - Field to extract
*/
#define EV_CODE_EXTRACT(x, y) \
((x >> ev_shift_##y) & ev_mask_##y)
void *event_sample_buf_mmap(int fd, int mmap_pages);
void *__event_read_samples(void *sample_buff, size_t *size, u64 *sample_count);