1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Performance event support - hardware-specific disambiguation
4  *
5  * For now this is a compile-time decision, but eventually it should be
6  * runtime.  This would allow multiplatform perf event support for e300 (fsl
7  * embedded perf counters) plus server/classic, and would accommodate
8  * devices other than the core which provide their own performance counters.
9  *
10  * Copyright 2010 Freescale Semiconductor, Inc.
11  */
12 
13 #ifdef CONFIG_PPC_PERF_CTRS
14 #include <asm/perf_event_server.h>
15 #endif
16 
17 #ifdef CONFIG_FSL_EMB_PERF_EVENT
18 #include <asm/perf_event_fsl_emb.h>
19 #endif
20 
21 #ifdef CONFIG_PERF_EVENTS
22 #include <asm/ptrace.h>
23 #include <asm/reg.h>
24 
25 #define perf_arch_bpf_user_pt_regs(regs) &regs->user_regs
26 
27 /*
28  * Overload regs->result to specify whether we should use the MSR (result
29  * is zero) or the SIAR (result is non zero).
30  */
31 #define perf_arch_fetch_caller_regs(regs, __ip)			\
32 	do {							\
33 		(regs)->result = 0;				\
34 		(regs)->nip = __ip;				\
35 		(regs)->gpr[1] = current_stack_pointer();	\
36 		asm volatile("mfmsr %0" : "=r" ((regs)->msr));	\
37 	} while (0)
38 
39 /* To support perf_regs sier update */
40 extern bool is_sier_available(void);
41 #endif
42