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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#else
16static inline bool is_sier_available(void) { return false; }
17#endif
18
19#ifdef CONFIG_FSL_EMB_PERF_EVENT
20#include <asm/perf_event_fsl_emb.h>
21#endif
22
23#ifdef CONFIG_PERF_EVENTS
24#include <asm/ptrace.h>
25#include <asm/reg.h>
26
27#define perf_arch_bpf_user_pt_regs(regs) ®s->user_regs
28
29/*
30 * Overload regs->result to specify whether we should use the MSR (result
31 * is zero) or the SIAR (result is non zero).
32 */
33#define perf_arch_fetch_caller_regs(regs, __ip) \
34 do { \
35 (regs)->result = 0; \
36 (regs)->nip = __ip; \
37 (regs)->gpr[1] = current_stack_frame(); \
38 asm volatile("mfmsr %0" : "=r" ((regs)->msr)); \
39 } while (0)
40
41/* To support perf_regs sier update */
42extern bool is_sier_available(void);
43/* To define perf extended regs mask value */
44extern u64 PERF_REG_EXTENDED_MASK;
45#define PERF_REG_EXTENDED_MASK PERF_REG_EXTENDED_MASK
46#endif