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-rw-r--r--tools/perf/arch/x86/util/event.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/tools/perf/arch/x86/util/event.c b/tools/perf/arch/x86/util/event.c
new file mode 100644
index 000000000..047dc00ea
--- /dev/null
+++ b/tools/perf/arch/x86/util/event.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/zalloc.h>
+
+#include "../../../util/event.h"
+#include "../../../util/synthetic-events.h"
+#include "../../../util/machine.h"
+#include "../../../util/tool.h"
+#include "../../../util/map.h"
+#include "../../../util/debug.h"
+
+#if defined(__x86_64__)
+
+int perf_event__synthesize_extra_kmaps(struct perf_tool *tool,
+ perf_event__handler_t process,
+ struct machine *machine)
+{
+ int rc = 0;
+ struct map *pos;
+ struct maps *kmaps = &machine->kmaps;
+ union perf_event *event = zalloc(sizeof(event->mmap) +
+ machine->id_hdr_size);
+
+ if (!event) {
+ pr_debug("Not enough memory synthesizing mmap event "
+ "for extra kernel maps\n");
+ return -1;
+ }
+
+ maps__for_each_entry(kmaps, pos) {
+ struct kmap *kmap;
+ size_t size;
+
+ if (!__map__is_extra_kernel_map(pos))
+ continue;
+
+ kmap = map__kmap(pos);
+
+ size = sizeof(event->mmap) - sizeof(event->mmap.filename) +
+ PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) +
+ machine->id_hdr_size;
+
+ memset(event, 0, size);
+
+ event->mmap.header.type = PERF_RECORD_MMAP;
+
+ /*
+ * kernel uses 0 for user space maps, see kernel/perf_event.c
+ * __perf_event_mmap
+ */
+ if (machine__is_host(machine))
+ event->header.misc = PERF_RECORD_MISC_KERNEL;
+ else
+ event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
+
+ event->mmap.header.size = size;
+
+ event->mmap.start = pos->start;
+ event->mmap.len = pos->end - pos->start;
+ event->mmap.pgoff = pos->pgoff;
+ event->mmap.pid = machine->pid;
+
+ strlcpy(event->mmap.filename, kmap->name, PATH_MAX);
+
+ if (perf_tool__process_synth_event(tool, event, machine,
+ process) != 0) {
+ rc = -1;
+ break;
+ }
+ }
+
+ free(event);
+ return rc;
+}
+
+#endif