The testcase uses event code 0x35340401e0 to verify the settings for different fields in Monitor Mode Control Register A (MMCRA). The fields include thresh_start, thresh_stop thresh_select, sdar mode, sample and marked bit. Checks if these fields are translated correctly via perf interface to MMCRA.
Signed-off-by: Kajol Jain <kj...@linux.ibm.com> --- .../powerpc/pmu/sampling_tests/Makefile | 4 +- .../mmcra_thresh_marked_sample_test.c | 80 +++++++++++++++++++ 2 files changed, 82 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_thresh_marked_sample_test.c diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile b/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile index 58d3ddf779d2..a9bf343df911 100644 --- a/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile @@ -4,7 +4,7 @@ include ../../../../../../scripts/Kbuild.include all: $(TEST_GEN_PROGS) mmcr0_exceptionbits_test.c mmcr0_cc56run_test.c mmcr0_pmccext_test.c \ mmcr0_pmcjce_test.c mmcr0_fc56_pmc1ce_test.c mmcr0_fc56_pmc56_test.c \ mmcr1_comb_test.c mmcr1_sel_unit_cache_test.c mmcr2_l2l3_test.c \ - mmcr2_fcs_fch_test.c mmcr3_src_test.c + mmcr2_fcs_fch_test.c mmcr3_src_test.c mmcra_thresh_marked_sample_test.c noarg: $(MAKE) -C ../../ @@ -18,7 +18,7 @@ no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \ TEST_GEN_PROGS := mmcr0_exceptionbits_test mmcr0_cc56run_test mmcr0_pmccext_test \ mmcr0_pmcjce_test mmcr0_fc56_pmc1ce_test mmcr0_fc56_pmc56_test \ mmcr1_comb_test mmcr1_sel_unit_cache_test mmcr2_l2l3_test \ - mmcr2_fcs_fch_test mmcr3_src_test + mmcr2_fcs_fch_test mmcr3_src_test mmcra_thresh_marked_sample_test LDFLAGS += $(no-pie-option) diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_thresh_marked_sample_test.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_thresh_marked_sample_test.c new file mode 100644 index 000000000000..ca6bdb335fa5 --- /dev/null +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcra_thresh_marked_sample_test.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2022, Kajol Jain, IBM Corp. + */ + +#include <stdio.h> +#include <stdlib.h> + +#include "../event.h" +#include "misc.h" +#include "utils.h" + +/* + * Primary PMU event used here is PM_MRK_INST_CMPL (0x401e0) + * Threshold event selection used is issue to complete for cycles + * Sampling criteria is Load only sampling + */ +#define EventCode 0x35340401e0 + +extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target); + +/* A perf sampling test to test mmcra fields */ +static int mmcra_thresh_marked_sample(void) +{ + struct event event; + u64 *intr_regs; + u64 dummy; + + /* Check for platform support for the test */ + SKIP_IF(check_pvr_for_sampling_tests()); + + /* Init the event for the sampling test */ + event_init_sampling(&event, EventCode); + event.attr.sample_regs_intr = platform_extended_mask; + FAIL_IF(event_open(&event)); + event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); + + event_enable(&event); + + /* workload to make the event overflow */ + thirty_two_instruction_loop_with_ll_sc(1000000, &dummy); + + event_disable(&event); + + /* Check for sample count */ + FAIL_IF(!collect_samples(event.mmap_buffer)); + + intr_regs = get_intr_regs(&event, event.mmap_buffer); + + /* Check for intr_regs */ + FAIL_IF(!intr_regs); + + /* + * Verify that thresh sel/start/stop, marked, random sample + * eligibility, sdar mode and sample mode fields match with + * the corresponding event code fields + */ + FAIL_IF(EV_CODE_EXTRACT(event.attr.config, thd_sel) != + GET_MMCR_FIELD(A, get_reg_value(intr_regs, "MMCRA"), 4, thd_sel)); + FAIL_IF(EV_CODE_EXTRACT(event.attr.config, thd_start) != + GET_MMCR_FIELD(A, get_reg_value(intr_regs, "MMCRA"), 4, thd_start)); + FAIL_IF(EV_CODE_EXTRACT(event.attr.config, thd_stop) != + GET_MMCR_FIELD(A, get_reg_value(intr_regs, "MMCRA"), 4, thd_stop)); + FAIL_IF(EV_CODE_EXTRACT(event.attr.config, marked) != + GET_MMCR_FIELD(A, get_reg_value(intr_regs, "MMCRA"), 4, marked)); + FAIL_IF(EV_CODE_EXTRACT(event.attr.config, sample >> 2) != + GET_MMCR_FIELD(A, get_reg_value(intr_regs, "MMCRA"), 4, rand_samp_elig)); + FAIL_IF(EV_CODE_EXTRACT(event.attr.config, sample & 0x3) != + GET_MMCR_FIELD(A, get_reg_value(intr_regs, "MMCRA"), 4, sample_mode)); + FAIL_IF(EV_CODE_EXTRACT(event.attr.config, sm) != + GET_MMCR_FIELD(A, get_reg_value(intr_regs, "MMCRA"), 4, sm)); + + event_close(&event); + return 0; +} + +int main(void) +{ + FAIL_IF(test_harness(mmcra_thresh_marked_sample, "mmcra_thresh_marked_sample")); +} -- 2.27.0