PERF_REG_ARM64_LR
if ((u32)idx == PERF_REG_ARM64_LR)
opts->sample_user_regs |= SMPL_REG_MASK(PERF_REG_ARM64_LR);
return regs->regs && regs->mask & SMPL_REG_MASK(PERF_REG_ARM64_LR);
case PERF_REG_ARM64_LR: