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| author |   Mike Leach <mike.leach@linaro.org> | 2021-08-18 13:40:19 -0600 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-18 22:33:28 +0200 |
| commit | 7fdc9bb2ce113c5318fdacbb717897fede81949d (patch) | |
| tree | fef93a47a41169ac91ab943966d075d20fa0b60e /drivers/hwtracing/coresight/coresight-syscfg.c | |
| parent | coresight: etm4x: Add complex configuration handlers to etmv4 (diff) | |
| download | linux-dev-7fdc9bb2ce113c5318fdacbb717897fede81949d.tar.xz linux-dev-7fdc9bb2ce113c5318fdacbb717897fede81949d.zip | |
coresight: config: Add preloaded configurations
Preload set of configurations.
This patch creates a small set of preloaded configurations and features
that are available immediately after coresight has been initialised.
The current set provides a strobing feature for ETMv4, that creates a
periodic sampling of trace by switching trace generation on and off
using counters in the ETM.
A configuration called "autofdo" is also provided that uses the 'strobing'
feature and provides a couple of preset values, selectable on the perf
command line.
Link: https://lore.kernel.org/r/20210723165444.1048-9-mike.leach@linaro.org
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210818194022.379573-9-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-syscfg.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-syscfg.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-syscfg.c b/drivers/hwtracing/coresight/coresight-syscfg.c index 795dba576fea..c0f764d85f20 100644 --- a/drivers/hwtracing/coresight/coresight-syscfg.c +++ b/drivers/hwtracing/coresight/coresight-syscfg.c @@ -752,8 +752,17 @@ int __init cscfg_init(void) INIT_LIST_HEAD(&cscfg_mgr->config_desc_list); atomic_set(&cscfg_mgr->sys_active_cnt, 0); + /* preload built-in configurations */ + err = cscfg_preload(); + if (err) + goto exit_err; + dev_info(cscfg_device(), "CoreSight Configuration manager initialised"); return 0; + +exit_err: + cscfg_clear_device(); + return err; } void cscfg_exit(void) |