1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2019 Hangzhou C-SKY Microsyst !! 2 /*
>> 3 * This file is subject to the terms and conditions of the GNU General Public
>> 4 * License. See the file "COPYING" in the main directory of this archive
>> 5 * for more details.
>> 6 *
>> 7 * Some parts derived from x86 version of this file.
>> 8 *
>> 9 * Copyright (C) 2013 Cavium, Inc.
>> 10 */
3 11
4 #include <linux/errno.h> <<
5 #include <linux/kernel.h> <<
6 #include <linux/perf_event.h> 12 #include <linux/perf_event.h>
7 #include <linux/bug.h> !! 13
8 #include <asm/perf_regs.h> <<
9 #include <asm/ptrace.h> 14 #include <asm/ptrace.h>
10 15
11 u64 perf_reg_value(struct pt_regs *regs, int i !! 16 #ifdef CONFIG_32BIT
>> 17 u64 perf_reg_abi(struct task_struct *tsk)
12 { 18 {
13 if (WARN_ON_ONCE((u32)idx >= PERF_REG_ !! 19 return PERF_SAMPLE_REGS_ABI_32;
14 return 0; <<
15 <<
16 return ((unsigned long *)regs)[idx]; <<
17 } 20 }
18 !! 21 #else /* Must be CONFIG_64BIT */
19 #define REG_RESERVED (~((1ULL << PERF_REG_RISC !! 22 u64 perf_reg_abi(struct task_struct *tsk)
>> 23 {
>> 24 if (test_tsk_thread_flag(tsk, TIF_32BIT_REGS))
>> 25 return PERF_SAMPLE_REGS_ABI_32;
>> 26 else
>> 27 return PERF_SAMPLE_REGS_ABI_64;
>> 28 }
>> 29 #endif /* CONFIG_32BIT */
20 30
21 int perf_reg_validate(u64 mask) 31 int perf_reg_validate(u64 mask)
22 { 32 {
23 if (!mask || mask & REG_RESERVED) !! 33 if (!mask)
>> 34 return -EINVAL;
>> 35 if (mask & ~((1ull << PERF_REG_MIPS_MAX) - 1))
24 return -EINVAL; 36 return -EINVAL;
25 <<
26 return 0; 37 return 0;
27 } 38 }
28 39
29 u64 perf_reg_abi(struct task_struct *task) !! 40 u64 perf_reg_value(struct pt_regs *regs, int idx)
30 { 41 {
31 #if __riscv_xlen == 64 !! 42 long v;
32 return PERF_SAMPLE_REGS_ABI_64; !! 43
33 #else !! 44 switch (idx) {
34 return PERF_SAMPLE_REGS_ABI_32; !! 45 case PERF_REG_MIPS_PC:
35 #endif !! 46 v = regs->cp0_epc;
>> 47 break;
>> 48 case PERF_REG_MIPS_R1 ... PERF_REG_MIPS_R25:
>> 49 v = regs->regs[idx - PERF_REG_MIPS_R1 + 1];
>> 50 break;
>> 51 case PERF_REG_MIPS_R28 ... PERF_REG_MIPS_R31:
>> 52 v = regs->regs[idx - PERF_REG_MIPS_R28 + 28];
>> 53 break;
>> 54
>> 55 default:
>> 56 WARN_ON_ONCE(1);
>> 57 return 0;
>> 58 }
>> 59
>> 60 return (s64)v; /* Sign extend if 32-bit. */
36 } 61 }
37 62
38 void perf_get_regs_user(struct perf_regs *regs 63 void perf_get_regs_user(struct perf_regs *regs_user,
39 struct pt_regs *regs) 64 struct pt_regs *regs)
40 { 65 {
41 regs_user->regs = task_pt_regs(current 66 regs_user->regs = task_pt_regs(current);
42 regs_user->abi = perf_reg_abi(current) 67 regs_user->abi = perf_reg_abi(current);
43 } 68 }
44 69
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