1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright(C) 2020 Linaro Limited. All rights reserved. 4 * Author: Mike Leach <mike.leach@linaro.org> 5 */ 6 7 #include "coresight-config.h" 8 #include "coresight-syscfg.h" 9 10 /* create an alternate autofdo configuration */ 11 12 /* we will provide 4 sets of preset parameter values */ 13 #define AFDO2_NR_PRESETS 4 14 /* the total number of parameters in used features - strobing has 2 */ 15 #define AFDO2_NR_PARAM_SUM 2 16 17 static const char *afdo2_ref_names[] = { 18 "strobing", 19 }; 20 21 /* 22 * set of presets leaves strobing window constant while varying period to allow 23 * experimentation with mark / space ratios for various workloads 24 */ 25 static u64 afdo2_presets[AFDO2_NR_PRESETS][AFDO2_NR_PARAM_SUM] = { 26 { 1000, 100 }, 27 { 1000, 1000 }, 28 { 1000, 5000 }, 29 { 1000, 10000 }, 30 }; 31 32 struct cscfg_config_desc afdo2 = { 33 .name = "autofdo2", 34 .description = "Setup ETMs with strobing for autofdo\n" 35 "Supplied presets allow experimentation with mark-space ratio for various loads\n", 36 .nr_feat_refs = ARRAY_SIZE(afdo2_ref_names), 37 .feat_ref_names = afdo2_ref_names, 38 .nr_presets = AFDO2_NR_PRESETS, 39 .nr_total_params = AFDO2_NR_PARAM_SUM, 40 .presets = &afdo2_presets[0][0], 41 }; 42 43 static struct cscfg_feature_desc *sample_feats[] = { 44 NULL 45 }; 46 47 static struct cscfg_config_desc *sample_cfgs[] = { 48 &afdo2, 49 NULL 50 }; 51 52 static struct cscfg_load_owner_info mod_owner = { 53 .type = CSCFG_OWNER_MODULE, 54 .owner_handle = THIS_MODULE, 55 }; 56 57 /* module init and exit - just load and unload configs */ 58 static int __init cscfg_sample_init(void) 59 { 60 return cscfg_load_config_sets(sample_cfgs, sample_feats, &mod_owner); 61 } 62 63 static void __exit cscfg_sample_exit(void) 64 { 65 cscfg_unload_config_sets(&mod_owner); 66 } 67 68 module_init(cscfg_sample_init); 69 module_exit(cscfg_sample_exit); 70 71 MODULE_LICENSE("GPL v2"); 72 MODULE_AUTHOR("Mike Leach <mike.leach@linaro.org>"); 73 MODULE_DESCRIPTION("CoreSight Syscfg Example"); 74