Describe fields in the TPMI debugfs folder. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx> --- v2 New. Documentation/ABI/testing/debugfs-tpmi | 31 ++++++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 32 insertions(+) create mode 100644 Documentation/ABI/testing/debugfs-tpmi diff --git a/Documentation/ABI/testing/debugfs-tpmi b/Documentation/ABI/testing/debugfs-tpmi new file mode 100644 index 000000000000..9b530c1aaa2d --- /dev/null +++ b/Documentation/ABI/testing/debugfs-tpmi @@ -0,0 +1,31 @@ +What: /sys/kernel/debug/tpmi-<n>/pfs_dump +Date: December 2023 +KernelVersion: 6.6 +Contact: srinivas.pandruvada@xxxxxxxxxxxxxxx +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: December 2023 +KernelVersion: 6.6 +Contact: srinivas.pandruvada@xxxxxxxxxxxxxxx +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: December 2023 +KernelVersion: 6.6 +Contact: srinivas.pandruvada@xxxxxxxxxxxxxxx +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 diff --git a/MAINTAINERS b/MAINTAINERS index 5761b02183a7..4d439121fb36 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -10720,6 +10720,7 @@ INTEL TPMI DRIVER M: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx> L: platform-driver-x86@xxxxxxxxxxxxxxx S: Maintained +F: Documentation/ABI/testing/debugfs-tpmi F: drivers/platform/x86/intel/tpmi.c F: include/linux/intel_tpmi.h -- 2.40.1
