linux/arch/powerpc/perf/perf_regs.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

116 lines
3.6 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2016 Anju T, IBM Corporation.
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
#include <linux/perf_event.h>
#include <linux/bug.h>
#include <linux/stddef.h>
#include <asm/ptrace.h>
#include <asm/perf_regs.h>
#define PT_REGS_OFFSET(id, r) [id] = offsetof(struct pt_regs, r)
#define REG_RESERVED (~((1ULL << PERF_REG_POWERPC_MAX) - 1))
static unsigned int pt_regs_offset[PERF_REG_POWERPC_MAX] = {
PT_REGS_OFFSET(PERF_REG_POWERPC_R0, gpr[0]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R1, gpr[1]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R2, gpr[2]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R3, gpr[3]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R4, gpr[4]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R5, gpr[5]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R6, gpr[6]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R7, gpr[7]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R8, gpr[8]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R9, gpr[9]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R10, gpr[10]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R11, gpr[11]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R12, gpr[12]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R13, gpr[13]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R14, gpr[14]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R15, gpr[15]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R16, gpr[16]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R17, gpr[17]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R18, gpr[18]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R19, gpr[19]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R20, gpr[20]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R21, gpr[21]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R22, gpr[22]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R23, gpr[23]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R24, gpr[24]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R25, gpr[25]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R26, gpr[26]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R27, gpr[27]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R28, gpr[28]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R29, gpr[29]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R30, gpr[30]),
PT_REGS_OFFSET(PERF_REG_POWERPC_R31, gpr[31]),
PT_REGS_OFFSET(PERF_REG_POWERPC_NIP, nip),
PT_REGS_OFFSET(PERF_REG_POWERPC_MSR, msr),
PT_REGS_OFFSET(PERF_REG_POWERPC_ORIG_R3, orig_gpr3),
PT_REGS_OFFSET(PERF_REG_POWERPC_CTR, ctr),
PT_REGS_OFFSET(PERF_REG_POWERPC_LINK, link),
PT_REGS_OFFSET(PERF_REG_POWERPC_XER, xer),
PT_REGS_OFFSET(PERF_REG_POWERPC_CCR, ccr),
#ifdef CONFIG_PPC64
PT_REGS_OFFSET(PERF_REG_POWERPC_SOFTE, softe),
#else
PT_REGS_OFFSET(PERF_REG_POWERPC_SOFTE, mq),
#endif
PT_REGS_OFFSET(PERF_REG_POWERPC_TRAP, trap),
PT_REGS_OFFSET(PERF_REG_POWERPC_DAR, dar),
PT_REGS_OFFSET(PERF_REG_POWERPC_DSISR, dsisr),
PT_REGS_OFFSET(PERF_REG_POWERPC_SIER, dar),
PT_REGS_OFFSET(PERF_REG_POWERPC_MMCRA, dsisr),
};
u64 perf_reg_value(struct pt_regs *regs, int idx)
{
if (WARN_ON_ONCE(idx >= PERF_REG_POWERPC_MAX))
return 0;
if (idx == PERF_REG_POWERPC_SIER &&
(IS_ENABLED(CONFIG_FSL_EMB_PERF_EVENT) ||
IS_ENABLED(CONFIG_PPC32) ||
!is_sier_available()))
return 0;
if (idx == PERF_REG_POWERPC_MMCRA &&
(IS_ENABLED(CONFIG_FSL_EMB_PERF_EVENT) ||
IS_ENABLED(CONFIG_PPC32)))
return 0;
return regs_get_register(regs, pt_regs_offset[idx]);
}
int perf_reg_validate(u64 mask)
{
if (!mask || mask & REG_RESERVED)
return -EINVAL;
return 0;
}
u64 perf_reg_abi(struct task_struct *task)
{
#ifdef CONFIG_PPC64
if (!test_tsk_thread_flag(task, TIF_32BIT))
return PERF_SAMPLE_REGS_ABI_64;
else
#endif
return PERF_SAMPLE_REGS_ABI_32;
}
void perf_get_regs_user(struct perf_regs *regs_user,
struct pt_regs *regs,
struct pt_regs *regs_user_copy)
{
regs_user->regs = task_pt_regs(current);
regs_user->abi = (regs_user->regs) ? perf_reg_abi(current) :
PERF_SAMPLE_REGS_ABI_NONE;
}