doc: TPMI: Add entry for Performance Limit Reasons

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

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>

authored by

Tero Kristo and committed by

Ilpo Järvinen 2 years ago 0da7a954 9e9397a4

1 changed file

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Documentation

ABI

testing

debugfs-tpmi

Documentation/ABI/testing/debugfs-tpmi

··· 29 29 echo 0,0x20,0xff > mem_write 30 30 echo 1,64,64 > mem_write 31 31 Users: Debugging, any user space test suite 32 + 33 + What: /sys/kernel/debug/tpmi-<n>/plr/domain<n>/status 34 + Date: Aug 2024 35 + KernelVersion: 6.11 36 + Contact: Tero Kristo <tero.kristo@linux.intel.com> 37 + Description: 38 + Shows the currently active Performance Limit Reasons for die level and the 39 + individual CPUs under the die. The contents of this file are sticky, and 40 + clearing all the statuses can be done by writing "0\n" to this file.