samples/coresight/coresight-cfg-sample.c

   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");