diff options
Diffstat (limited to 'tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr0_pmccext_test.c')
-rw-r--r-- | tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr0_pmccext_test.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr0_pmccext_test.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr0_pmccext_test.c new file mode 100644 index 000000000..dfd186cd8 --- /dev/null +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr0_pmccext_test.c @@ -0,0 +1,59 @@ +// 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" + +extern void thirty_two_instruction_loop(int loops); + +/* + * A perf sampling test for mmcr0 + * field: pmccext + */ +static int mmcr0_pmccext(void) +{ + struct event event; + u64 *intr_regs; + + /* Check for platform support for the test */ + SKIP_IF(check_pvr_for_sampling_tests()); + SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1)); + + /* Init the event for the sampling test */ + event_init_sampling(&event, 0x4001e); + event.attr.sample_regs_intr = platform_extended_mask; + FAIL_IF(event_open(&event)); + event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); + + FAIL_IF(event_enable(&event)); + + /* workload to make the event overflow */ + thirty_two_instruction_loop(10000); + + FAIL_IF(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 pmccext field is set in MMCR0 */ + FAIL_IF(!get_mmcr0_pmccext(get_reg_value(intr_regs, "MMCR0"), 4)); + + event_close(&event); + return 0; +} + +int main(void) +{ + return test_harness(mmcr0_pmccext, "mmcr0_pmccext"); +} |