3 files changed, 63 insertions, 0 deletions
diff --git a/arch/xtensa/oprofile/Makefile b/arch/xtensa/oprofile/Makefile
new file mode 100644
index 000000000..f559b9ffb
--- /dev/null
+++ b/arch/xtensa/oprofile/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_OPROFILE) += oprofile.o
+
+DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
+		oprof.o cpu_buffer.o buffer_sync.o \
+		event_buffer.o oprofile_files.o \
+		oprofilefs.o oprofile_stats.o \
+		timer_int.o )
+
+oprofile-y := $(DRIVER_OBJS) init.o backtrace.o
diff --git a/arch/xtensa/oprofile/backtrace.c b/arch/xtensa/oprofile/backtrace.c
new file mode 100644
index 000000000..8f952034e
--- /dev/null
+++ b/arch/xtensa/oprofile/backtrace.c
@@ -0,0 +1,27 @@
+/**
+ * @file backtrace.c
+ *
+ * @remark Copyright 2008 Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ * @remark Read the file COPYING
+ *
+ */
+
+#include <linux/oprofile.h>
+#include <asm/ptrace.h>
+#include <asm/stacktrace.h>
+
+static int xtensa_backtrace_cb(struct stackframe *frame, void *data)
+{
+	oprofile_add_trace(frame->pc);
+	return 0;
+}
+
+void xtensa_backtrace(struct pt_regs * const regs, unsigned int depth)
+{
+	if (user_mode(regs))
+		xtensa_backtrace_user(regs, depth, xtensa_backtrace_cb, NULL);
+	else
+		xtensa_backtrace_kernel(regs, depth, xtensa_backtrace_cb,
+					xtensa_backtrace_cb, NULL);
+}
diff --git a/arch/xtensa/oprofile/init.c b/arch/xtensa/oprofile/init.c
new file mode 100644
index 000000000..a67eea379
--- /dev/null
+++ b/arch/xtensa/oprofile/init.c
@@ -0,0 +1,26 @@
+/**
+ * @file init.c
+ *
+ * @remark Copyright 2008 Tensilica Inc.
+ * @remark Read the file COPYING
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/oprofile.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+
+
+extern void xtensa_backtrace(struct pt_regs *const regs, unsigned int depth);
+
+int __init oprofile_arch_init(struct oprofile_operations *ops)
+{
+	ops->backtrace = xtensa_backtrace;
+	return -ENODEV;
+}
+
+
+void oprofile_arch_exit(void)
+{
+}