What: /sys/kernel/debug/tpmi-<n>/pfs_dump
Date: November 2023
KernelVersion: 6.6
Contact: [email protected]
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: [email protected]
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: [email protected]
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 <[email protected]>
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.
Codebase Browser
linux