Add Intel PT full trace mode basic test case

testcases/kernel/tracing/pt_test/Makefile new file +4 -0

+top_srcdir		?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+include $(top_srcdir)/include/mk/generic_leaf_target.mk

testcases/kernel/tracing/pt_test/pt_test.c new file +6 -0

new file mode 100644
index 000000000..e7a402cdb
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2018 Intel Corporation
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by

testcases/kernel/tracing/pt_test/pt_test.c new file +5 -0

+ * author: Ammy Yi ([email protected])
+ * date:   8/20/2018
+ */
+
+/*

testcases/kernel/tracing/pt_test/pt_test.c new file +81 -0

+	PROTo = PROT_READ | PROT_WRITE;
+
+	pbufSz = INTEL_PT_MEMSIZE;
+//try to mmap for trace
+	bufEv[0] = SAFE_MMAP(NULL, pbufSz, PROT_READ | PROT_WRITE,
+							MAP_SHARED, fde, 0);
+
+	if (bufEv[0] != MAP_FAILED) {
+		pc = (struct perf_event_mmap_page *)bufEv[0];
+		pc->aux_offset = pbufSz;
+		pc->aux_size = bufsize;
+		bufEv[1] = SAFE_MMAP(NULL, bufsize, PROTo, MAP_SHARED,
+								fde, pbufSz);
+	}
+	return bufEv;
+}
+
+
+int Intel_PT_pmu_value(char *dir)
+{
+	char *value;
+	int temp = 0, val = 0;
+	char delims[] = ":";
+	FILE *f = fopen(dir, "r");
+// try to get sysfs value
+	if (f) {
+		temp = fscanf(f, "%m[^\n]", &value);
+		if (temp != 1) {
+			tst_res(TINFO, "Read value fail!");
+		} else {
+			if (strstr(value, delims) == NULL) {
+				val = atoi(value);
+			} else {
+				strsep(&value, delims);
+				val = atoi(value);
+			}
+		}
+		fclose(f);
+	}
+
+	return val;
+}
+
+void delMap(uint64_t **bufEv, long bufsize)
+{
+	long pbufSz;
+
+	pbufSz = INTEL_PT_MEMSIZE;
+
+	munmap(bufEv[0], pbufSz);
+	munmap(bufEv[1], bufsize);
+
+	free(bufEv);
+}
+
+static void INTEL_PT_FULL_TRACE_CHECK(void)
+{
+	struct perf_event_attr attr = {};
+	struct perf_event_mmap_page *pmp;
+	uint64_t aux_head = 0;
+
+	BUFSZ = 2 * PAGESIZE;
+
+	//set attr for Intel PT trace
+	attr.type	= Intel_PT_pmu_value(INTEL_PT_PMU_TYPE);
+	attr.read_format = PERF_FORMAT_ID | PERF_FORMAT_TOTAL_TIME_RUNNING |
+				PERF_FORMAT_TOTAL_TIME_ENABLED;
+	attr.disabled	= 1;
+	attr.config	= BIT(Intel_PT_pmu_value(INTEL_PT_FORMAT_TSC)) |
+				BIT(Intel_PT_pmu_value(INTEL_PT_FORMAT_NRT));
+	attr.size	= sizeof(struct perf_event_attr);
+	attr.exclude_kernel		= 0;
+	attr.exclude_user		= 0;
+	attr.mmap			= 1;
+
+	//only get trace for own pid
+	FDE = tst_syscall(__NR_perf_event_open, &attr, 0, -1, -1, 0);
+	if (FDE < 0) {
+		tst_res(TINFO, "Open Intel PT event failed!");
+		tst_res(TFAIL, "perf trace full mode is failed!");
+		return;

testcases/kernel/tracing/pt_test/pt_test.c new file +43 -0

+	/* enable tracing */
+	if (ioctl(FDE, PERF_EVENT_IOC_RESET) != 0) {
+		tst_res(TFAIL, "ioctl with PERF_EVENT_IOC_RESET is failed!");
+		return;
+	}
+	if (ioctl(FDE, PERF_EVENT_IOC_ENABLE) != 0) {
+		tst_res(TFAIL, "ioctl with PERF_EVENT_IOC_ENABLE is failed!");
+		return;
+	}
+
+	/* stop tracing */
+	if (ioctl(FDE, PERF_EVENT_IOC_DISABLE) != 0) {
+		tst_res(TFAIL, "ioctl with PERF_EVENT_IOC_DISABLE is failed!");
+		return;
+	}
+
+	// check if there is some trace generated
+	pmp = (struct perf_event_mmap_page *)BUFM[0];
+	aux_head = *(volatile uint64_t *)&pmp->aux_head;
+	if (aux_head == 0) {
+		tst_res(TFAIL, "There is no trace, so failed!");
+		return;
+	}
+
+	tst_res(TPASS, "perf trace full mode is passed!");
+
+}
+
+void Cleanup(void)
+{
+	if (FDE != -1)
+		close(FDE);
+
+	if (!BUFM || (BUFM)[0] == MAP_FAILED || (BUFM)[1] == MAP_FAILED)
+		delMap(BUFM, BUFSZ);
+}
+
+static struct tst_test test = {
+	.test_all = INTEL_PT_FULL_TRACE_CHECK,
+	.min_kver = "4.1",
+	.cleanup = Cleanup,
+	.needs_root = 1,
+};

Signature · 5 lines

2.14.1


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