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An example of creating a loadable module to add CoreSight configurations into a system. In the Kernel samples/coresight directory. Signed-off-by: Mike Leach <mike.leach@linaro.org> Link: https://lore.kernel.org/r/20211124200038.28662-5-mike.leach@linaro.org Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright(C) 2020 Linaro Limited. All rights reserved.
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* Author: Mike Leach <mike.leach@linaro.org>
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*/
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#include "coresight-config.h"
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#include "coresight-syscfg.h"
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/* create an alternate autofdo configuration */
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/* we will provide 4 sets of preset parameter values */
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#define AFDO2_NR_PRESETS 4
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/* the total number of parameters in used features - strobing has 2 */
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#define AFDO2_NR_PARAM_SUM 2
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static const char *afdo2_ref_names[] = {
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"strobing",
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};
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/*
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* set of presets leaves strobing window constant while varying period to allow
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* experimentation with mark / space ratios for various workloads
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*/
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static u64 afdo2_presets[AFDO2_NR_PRESETS][AFDO2_NR_PARAM_SUM] = {
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{ 1000, 100 },
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{ 1000, 1000 },
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{ 1000, 5000 },
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{ 1000, 10000 },
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};
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struct cscfg_config_desc afdo2 = {
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.name = "autofdo2",
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.description = "Setup ETMs with strobing for autofdo\n"
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"Supplied presets allow experimentation with mark-space ratio for various loads\n",
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.nr_feat_refs = ARRAY_SIZE(afdo2_ref_names),
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.feat_ref_names = afdo2_ref_names,
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.nr_presets = AFDO2_NR_PRESETS,
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.nr_total_params = AFDO2_NR_PARAM_SUM,
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.presets = &afdo2_presets[0][0],
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};
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static struct cscfg_feature_desc *sample_feats[] = {
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NULL
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};
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static struct cscfg_config_desc *sample_cfgs[] = {
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&afdo2,
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NULL
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};
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static struct cscfg_load_owner_info mod_owner = {
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.type = CSCFG_OWNER_MODULE,
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.owner_handle = THIS_MODULE,
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};
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/* module init and exit - just load and unload configs */
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static int __init cscfg_sample_init(void)
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{
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return cscfg_load_config_sets(sample_cfgs, sample_feats, &mod_owner);
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}
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static void __exit cscfg_sample_exit(void)
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{
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cscfg_unload_config_sets(&mod_owner);
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}
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module_init(cscfg_sample_init);
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module_exit(cscfg_sample_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Mike Leach <mike.leach@linaro.org>");
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MODULE_DESCRIPTION("CoreSight Syscfg Example");
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