Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Performance event callchain support - SuperH architecture code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2009  Paul Mundt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/perf_event.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/percpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/unwinder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) static void callchain_address(void *data, unsigned long addr, int reliable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	struct perf_callchain_entry_ctx *entry = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	if (reliable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		perf_callchain_store(entry, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static const struct stacktrace_ops callchain_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	.address	= callchain_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	perf_callchain_store(entry, regs->pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }