From: Athira Rajeev <atraj...@linux.vnet.ibm.com> The testcase uses event code "0x26880" to verify the settings for different fields in Monitor Mode Control Register 1 (MMCR1). The field include PMCxCOMB. Checks if this field are translated correctly via perf interface to MMCR1
Add selftest for mmcr1 comb field. Signed-off-by: Athira Rajeev <atraj...@linux.vnet.ibm.com> --- .../powerpc/pmu/sampling_tests/Makefile | 6 +- .../pmu/sampling_tests/mmcr1_comb_test.c | 66 +++++++++++++++++++ 2 files changed, 70 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr1_comb_test.c diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile b/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile index d27d5084a3ce..bb5ffd2e322d 100644 --- a/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile @@ -2,7 +2,8 @@ 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 + mmcr0_pmcjce_test.c mmcr0_fc56_pmc1ce_test.c mmcr0_fc56_pmc56_test.c \ + mmcr1_comb_test.c noarg: $(MAKE) -C ../../ @@ -14,7 +15,8 @@ no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \ $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -no-pie -x c - -o "$$TMP", -no-pie) TEST_GEN_PROGS := mmcr0_exceptionbits_test mmcr0_cc56run_test mmcr0_pmccext_test \ - mmcr0_pmcjce_test mmcr0_fc56_pmc1ce_test mmcr0_fc56_pmc56_test + mmcr0_pmcjce_test mmcr0_fc56_pmc1ce_test mmcr0_fc56_pmc56_test \ + mmcr1_comb_test LDFLAGS += $(no-pie-option) diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr1_comb_test.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr1_comb_test.c new file mode 100644 index 000000000000..0f183c2f074d --- /dev/null +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr1_comb_test.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2022, Athira Rajeev, IBM Corp. + */ + +#include <stdio.h> +#include <stdlib.h> + +#include "../event.h" +#include "misc.h" +#include "utils.h" + +/* All successful D-side store dispatches for this thread that were L2 Miss */ +#define EventCode 0x46880 + +extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target); + +/* + * A perf sampling test for mmcr1 + * fields : comb. + */ +static int mmcr1_comb(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(10000000, &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 comb field match with + * corresponding event code fields + */ + FAIL_IF(EV_CODE_EXTRACT(event.attr.config, comb) != GET_MMCR_FIELD(1, + get_reg_value(intr_regs, "MMCR1"), 4, comb)); + + event_close(&event); + return 0; +} + +int main(void) +{ + FAIL_IF(test_harness(mmcr1_comb, "mmcr1_comb")); +} -- 2.27.0