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doc: TPMI: Add entry for Performance Limit Reasons

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Describe the new 'plr' (Performance Limit Reasons) directory contents under
the main TPMI debugfs folder.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Tero Kristo <tero.kristo@linux.intel.com>
Link: https://lore.kernel.org/r/20240527133400.483634-7-tero.kristo@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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Tero Kristo 2024-05-27 16:29:38 +03:00 committed by Ilpo Järvinen
parent 9e9397a41b
commit 0da7a95448
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Documentation/ABI/testing/debugfs-tpmi
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@ -29,3 +29,12 @@ Example:
echo 0,0x20,0xff > mem_write
echo 1,64,64 > mem_write
Users: Debugging, any user space test suite
What: /sys/kernel/debug/tpmi-<n>/plr/domain<n>/status
Date: Aug 2024
KernelVersion: 6.11
Contact: Tero Kristo <tero.kristo@linux.intel.com>
Description:
Shows the currently active Performance Limit Reasons for die level and the
individual CPUs under the die. The contents of this file are sticky, and
clearing all the statuses can be done by writing "0\n" to this file.