1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include "perf_regs.h" 4 #include "event.h" 5 6 int __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused, 7 char **new_op __maybe_unused) 8 { 9 return SDT_ARG_SKIP; 10 } 11 12 uint64_t __weak arch__intr_reg_mask(void) 13 { 14 return PERF_REGS_MASK; 15 } 16 17 uint64_t __weak arch__user_reg_mask(void) 18 { 19 return PERF_REGS_MASK; 20 } 21 22 #ifdef HAVE_PERF_REGS_SUPPORT 23 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id) 24 { 25 int i, idx = 0; 26 u64 mask = regs->mask; 27 28 if (regs->cache_mask & (1ULL << id)) 29 goto out; 30 31 if (!(mask & (1ULL << id))) 32 return -EINVAL; 33 34 for (i = 0; i < id; i++) { 35 if (mask & (1ULL << i)) 36 idx++; 37 } 38 39 regs->cache_mask |= (1ULL << id); 40 regs->cache_regs[id] = regs->regs[idx]; 41 42 out: 43 *valp = regs->cache_regs[id]; 44 return 0; 45 } 46 #endif 47