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Linux kernel mirror (for testing)
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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) ®s->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_frame(); \
36 asm volatile("mfmsr %0" : "=r" ((regs)->msr)); \
37 } while (0)
38
39/* To support perf_regs sier update */
40extern bool is_sier_available(void);
41#endif