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author | Madhavan Srinivasan <maddy@linux.ibm.com> | 2022-01-27 12:50:09 +0530 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-03-01 23:40:26 +1100 |
commit | ac575b2606bf99a0d01a054196e24e1ad82c194d (patch) | |
tree | a24b58bcb1e1ff1cd8b38dbf5f3e1a0164d59f4a /tools/testing/selftests/powerpc | |
parent | 2becea3b6acf308642d6c0e9bd41caf7820753f5 (diff) | |
download | linux-stable-ac575b2606bf99a0d01a054196e24e1ad82c194d.tar.gz linux-stable-ac575b2606bf99a0d01a054196e24e1ad82c194d.tar.bz2 linux-stable-ac575b2606bf99a0d01a054196e24e1ad82c194d.zip |
selftests/powerpc/pmu/: Add interface test for mmcr2_l2l3 field
The testcases uses event code 0x010000046080 to verify the l2l3 bit
setting for Monitor Mode Control Register 2 (MMCR2). check if this bit
is set correctly via perf interface in ISA v3.1 platform.
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
[mpe: Add error checking, drop GET_MMCR_FIELD, add to .gitignore]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220127072012.662451-18-kjain@linux.ibm.com
Diffstat (limited to 'tools/testing/selftests/powerpc')
3 files changed, 76 insertions, 1 deletions
diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore b/tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore index f0ad66d78ee0..84bfc4d0e51c 100644 --- a/tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/.gitignore @@ -5,3 +5,4 @@ mmcr0_pmcjce_test mmcr0_fc56_pmc1ce_test mmcr0_fc56_pmc56_test mmcr1_comb_test +mmcr2_l2l3_test diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile b/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile index da87ffddc568..ec4c758e91a9 100644 --- a/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/Makefile @@ -3,7 +3,7 @@ CFLAGS += -m64 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_comb_test mmcr2_l2l3_test top_srcdir = ../../../../../.. include ../../../lib.mk diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr2_l2l3_test.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr2_l2l3_test.c new file mode 100644 index 000000000000..ceca597016b2 --- /dev/null +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/mmcr2_l2l3_test.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2022, Madhavan Srinivasan, 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 */ +#define EventCode 0x010000046080 + +#define MALLOC_SIZE (0x10000 * 10) /* Ought to be enough .. */ + +/* + * A perf sampling test for mmcr2 + * fields : l2l3 + */ +static int mmcr2_l2l3(void) +{ + struct event event; + u64 *intr_regs; + char *p; + int i; + + /* 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, EventCode); + 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 */ + p = malloc(MALLOC_SIZE); + FAIL_IF(!p); + + for (i = 0; i < MALLOC_SIZE; i += 0x10000) + p[i] = i; + + 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 l2l3 field of MMCR2 match with + * corresponding event code field + */ + FAIL_IF(EV_CODE_EXTRACT(event.attr.config, l2l3) != + get_mmcr2_l2l3(get_reg_value(intr_regs, "MMCR2"), 4)); + + event_close(&event); + free(p); + + return 0; +} + +int main(void) +{ + return test_harness(mmcr2_l2l3, "mmcr2_l2l3"); +} |