// SPDX-License-Identifier: GPL-2.0 /* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Some parts derived from x86 version of this file. * * Copyright (C) 2013 Cavium, Inc. */ #include <linux/perf_event.h> #include <asm/ptrace.h> #ifdef CONFIG_32BIT u64 perf_reg_abi(struct task_struct *tsk) { return PERF_SAMPLE_REGS_ABI_32; } #else /* Must be CONFIG_64BIT */ u64 perf_reg_abi(struct task_struct *tsk) { if (test_tsk_thread_flag(tsk, TIF_32BIT_REGS)) return PERF_SAMPLE_REGS_ABI_32; else return PERF_SAMPLE_REGS_ABI_64; } #endif /* CONFIG_32BIT */ int perf_reg_validate(u64 mask) { if (!mask) return -EINVAL; if (mask & ~((1ull << PERF_REG_MIPS_MAX) - 1)) return -EINVAL; return 0; } u64 perf_reg_value(struct pt_regs *regs, int idx) { long v; switch (idx) { case PERF_REG_MIPS_PC: v = regs->cp0_epc; break; case PERF_REG_MIPS_R1 ... PERF_REG_MIPS_R25: v = regs->regs[idx - PERF_REG_MIPS_R1 + 1]; break; case PERF_REG_MIPS_R28 ... PERF_REG_MIPS_R31: v = regs->regs[idx - PERF_REG_MIPS_R28 + 28]; break; default: WARN_ON_ONCE(1); return 0; } return (s64)v; /* Sign extend if 32-bit. */ } void perf_get_regs_user(struct perf_regs *regs_user, struct pt_regs *regs) { regs_user->regs = task_pt_regs(current); regs_user->abi = perf_reg_abi(current); }