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
