0da7a95448
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>
41 lines
1.4 KiB
Plaintext
41 lines
1.4 KiB
Plaintext
What: /sys/kernel/debug/tpmi-<n>/pfs_dump
|
|
Date: November 2023
|
|
KernelVersion: 6.6
|
|
Contact: srinivas.pandruvada@linux.intel.com
|
|
Description:
|
|
The PFS (PM Feature Structure) table, shows details of each power
|
|
management feature. This includes:
|
|
tpmi_id, number of entries, entry size, offset, vsec offset, lock status
|
|
and disabled status.
|
|
Users: Debugging, any user space test suite
|
|
|
|
What: /sys/kernel/debug/tpmi-<n>/tpmi-id-<n>/mem_dump
|
|
Date: November 2023
|
|
KernelVersion: 6.6
|
|
Contact: srinivas.pandruvada@linux.intel.com
|
|
Description:
|
|
Shows the memory dump of the MMIO region for a TPMI ID.
|
|
Users: Debugging, any user space test suite
|
|
|
|
What: /sys/kernel/debug/tpmi-<n>/tpmi-id-<n>/mem_write
|
|
Date: November 2023
|
|
KernelVersion: 6.6
|
|
Contact: srinivas.pandruvada@linux.intel.com
|
|
Description:
|
|
Allows to write at any offset. It doesn't check for Read/Write access
|
|
as hardware will not allow to write at read-only memory. This write is
|
|
at offset multiples of 4. The format is instance,offset,contents.
|
|
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.
|