1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * arm64 callchain support 4 * 5 * Copyright (C) 2015 ARM Limited 6 */ 7 #include <linux/perf_event.h> 8 #include <linux/stacktrace.h> 9 #include <linux/uaccess.h> 10 11 #include <asm/pointer_auth.h> 12 13 static bool callchain_trace(void *data, unsigned long pc) 14 { 15 struct perf_callchain_entry_ctx *entry = data; 16 17 return perf_callchain_store(entry, pc) == 0; 18 } 19 20 void perf_callchain_user(struct perf_callchain_entry_ctx *entry, 21 struct pt_regs *regs) 22 { 23 if (perf_guest_state()) { 24 /* We don't support guest os callchain now */ 25 return; 26 } 27 28 arch_stack_walk_user(callchain_trace, entry, regs); 29 } 30 31 void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, 32 struct pt_regs *regs) 33 { 34 if (perf_guest_state()) { 35 /* We don't support guest os callchain now */ 36 return; 37 } 38 39 arch_stack_walk(callchain_trace, entry, current, regs); 40 } 41