** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Information type changed from Private to Public
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https://bugs.launchpad.net/bugs/1854244
Title:
[TGL][pmc_core]Need patch to support offset number 21 and 22 device
LTR ignore
Status in intel:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
Description:
Intel PMC_CORE driver, the currently device LTR ignore function support
covers the IP offset from 0 to 20, while e.g. tgl , which support IP offset 21
and 22
root@p-tgl02/sys/kernel/debug/pmc_core # cat ltr_show
SOUTHPORT_A LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
SOUTHPORT_B LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
SATA LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
GIGABIT_ETHERNET LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
XHCI LTR: RAW: 0x9001 Non-Snoop(ns): 0 Snoop(ns): 1048576
Reserved LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
ME LTR: RAW: 0x8000800 Non-Snoop(ns): 0 Snoop(ns): 0
EVA LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
SOUTHPORT_C LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
HD_AUDIO LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
CNV LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
LPSS LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
SOUTHPORT_D LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
SOUTHPORT_E LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
CAMERA LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
ESPI LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
SCC LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
ISH LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
UFSX2 LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
EMMC LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
WIGIG LTR: RAW: 0x0 Non-Snoop(ns): 0 Snoop(ns): 0
CURRENT_PLATFORM LTR: RAW: 0x40201 Non-Snoop(ns): 0 Snoop(ns): 0
AGGREGATED_SYSTEM LTR: RAW: 0x7dbebf5 Non-Snoop(ns): 0 Snoop(ns): 1037312
and currently pmc_core does not support offset number 21, 22 device LTR
ignore:
root@p-tgl02/sys/kernel/debug/pmc_core # echo 21 > ltr_ignore
-bash: echo: write error: Invalid argument
root@p-tgl02/sys/kernel/debug/pmc_core # echo 22 > ltr_ignore
-bash: echo: write error: Invalid argument
root@p-tgl02/sys/kernel/debug/pmc_core # echo 20 > ltr_ignore
root@p-tgl02/sys/kernel/debug/pmc_core #
So need your help to have a patch for the offset number 21, 22 device
LTR supported.
Target Release: 20.04
Target Kernel: 5.7
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