arch/powerpc/include/asm/perf_event.h

   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
  16 static 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) &regs->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_pointer();       \
  38                 asm volatile("mfmsr %0" : "=r" ((regs)->msr));  \
  39         } while (0)
  40
  41 /* To support perf_regs sier update */
  42 extern bool is_sier_available(void);
  43 #endif