These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / tools / perf / arch / x86 / util / auxtrace.c

diff --git a/kernel/tools/perf/arch/x86/util/auxtrace.c b/kernel/tools/perf/arch/x86/util/auxtrace.c
new file mode 100644 (file)
index 0000000..7a78055
--- /dev/null
+++ b/kernel/tools/perf/arch/x86/util/auxtrace.c
@@ -0,0 +1,83 @@
+/*
+ * auxtrace.c: AUX area tracing support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <stdbool.h>
+
+#include "../../util/header.h"
+#include "../../util/debug.h"
+#include "../../util/pmu.h"
+#include "../../util/auxtrace.h"
+#include "../../util/intel-pt.h"
+#include "../../util/intel-bts.h"
+#include "../../util/evlist.h"
+
+static
+struct auxtrace_record *auxtrace_record__init_intel(struct perf_evlist *evlist,
+                                                   int *err)
+{
+       struct perf_pmu *intel_pt_pmu;
+       struct perf_pmu *intel_bts_pmu;
+       struct perf_evsel *evsel;
+       bool found_pt = false;
+       bool found_bts = false;
+
+       intel_pt_pmu = perf_pmu__find(INTEL_PT_PMU_NAME);
+       intel_bts_pmu = perf_pmu__find(INTEL_BTS_PMU_NAME);
+
+       if (evlist) {
+               evlist__for_each(evlist, evsel) {
+                       if (intel_pt_pmu &&
+                           evsel->attr.type == intel_pt_pmu->type)
+                               found_pt = true;
+                       if (intel_bts_pmu &&
+                           evsel->attr.type == intel_bts_pmu->type)
+                               found_bts = true;
+               }
+       }
+
+       if (found_pt && found_bts) {
+               pr_err("intel_pt and intel_bts may not be used together\n");
+               *err = -EINVAL;
+               return NULL;
+       }
+
+       if (found_pt)
+               return intel_pt_recording_init(err);
+
+       if (found_bts)
+               return intel_bts_recording_init(err);
+
+       return NULL;
+}
+
+struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
+                                             int *err)
+{
+       char buffer[64];
+       int ret;
+
+       *err = 0;
+
+       ret = get_cpuid(buffer, sizeof(buffer));
+       if (ret) {
+               *err = ret;
+               return NULL;
+       }
+
+       if (!strncmp(buffer, "GenuineIntel,", 13))
+               return auxtrace_record__init_intel(evlist, err);
+
+       return NULL;
+}