SRU: https://lists.ubuntu.com/archives/kernel-team/2021-July/122406.html
(impish, oem-5.13)
** Description changed:
+ [SRU Justification]
+
+ [Impact]
[18/14083]
+
+ On Intel Alder Lake platforms, processor thermal device provides an
+ additional thermal zone TCPU_PCI that is based on a new PCI MMIO only
+ driver.
+
+ [Fix]
+
+ Two upstream v5.14-rc1 commits to backport.
+
+ [Test Case]
+
+ $ lspci -vvnns 00:04.0
+ 00:04.0 Signal processing controller [1180]: Intel Corporation Device
+ [8086:461d] (rev 01)
+ Subsystem: Intel Corporation Device [8086:7270]
+ ...
+
+ # thermal_zones provided by the original driver
+ $ cat /sys/devices/virtual/thermal/thermal_zone*/type
+ acpitz
+ INT3400 Thermal
+ TCPU
+ x86_pkg_temp
+
+ # thermal_zones provided by the new driver
+ $ cat /sys/devices/virtual/thermal/thermal_zone*/type
+ acpitz
+ INT3400 Thermal
+ TCPU
+ TCPU_PCI
+ x86_pkg_temp
+
+ [Where problems could occur]
+
+ These changes do not change existing interface to userspace, but add an
+ additional thermal zone that doesn't involve ACPI method calls for use.
+
+ [Other Info]
+
+ ADL targets 5.13 kernel, so only Impish and oem-5.13 are nominated.
+
+ ========== original bug description ==========
+
$ lspci -vvnns 00:04.0
00:04.0 Signal processing controller [1180]: Intel Corporation Device
[8086:461d] (rev 01)
Subsystem: Intel Corporation Device [8086:7270]
Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 16
Region 0: Memory at 6001c00000 (64-bit, non-prefetchable) [size=128K]
Capabilities: <access denied>
Kernel driver in use: proc_thermal
Kernel modules: processor_thermal_device
[original]
$ cat /sys/devices/virtual/thermal/thermal_zone*/type
acpitz
INT3400 Thermal
TCPU
x86_pkg_temp
[patched]
$ cat /sys/devices/virtual/thermal/thermal_zone*/type
acpitz
INT3400 Thermal
TCPU
TCPU_PCI
x86_pkg_temp
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ubuntu 1367 F.... pulseaudio
CasperMD5CheckResult: skip
DistributionChannelDescriptor:
# This is the distribution channel descriptor for the OEM CDs
# For more information see
http://wiki.ubuntu.com/DistributionChannelDescriptor
canonical-oem-somerville-focal-amd64-20200502-85+fossa-edge-staging+X130
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2021-06-18 (18 days ago)
InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary
20200502-05:58
IwConfig:
lo no wireless extensions.
enp0s31f6 no wireless extensions.
MachineType: Intel Corporation Alder Lake Client Platform
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-2006-oem
root=UUID=a4f90fb9-1c2c-4d37-be7a-1b67b667c378 ro automatic-oem-config quiet
splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.13.0-2006.6+lp1934660.1.adl.pmc.core-oem 5.13.0
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-5.13.0-2006-oem N/A
linux-backports-modules-5.13.0-2006-oem N/A
linux-firmware 1.187.15
RfKill:
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
Tags: focal
Uname: Linux 5.13.0-2006-oem x86_64
UnreportableReason: This report is about a package that is not installed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
_MarkForUpload: False
dmi.bios.date: 02/25/2021
dmi.bios.vendor: Intel Corporation
dmi.bios.version: ADLSFWI1.R00.2081.A02.2102250858
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: AlderLake-S ADP-S DDR5 UDIMM CRB
dmi.board.vendor: Intel Corporation
dmi.board.version: 2
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 3
dmi.chassis.vendor: Intel Corporation
dmi.chassis.version: 0.1
dmi.ec.firmware.release: 1.25
dmi.modalias:
dmi:bvnIntelCorporation:bvrADLSFWI1.R00.2081.A02.2102250858:bd02/25/2021:efr1.25:svnIntelCorporation:pnAlderLakeClientPlatform:pvr0.1:sku00001001002B0100:rvnIntelCorporation:rnAlderLake-SADP-SDDR5UDIMMCRB:rvr2:cvnIntelCorporation:ct3:cvr0.1:
dmi.product.family: Alder Lake Client System
dmi.product.name: Alder Lake Client Platform
dmi.product.sku: 00001001002B0100
dmi.product.version: 0.1
dmi.sys.vendor: Intel Corporation
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https://bugs.launchpad.net/bugs/1934741
Title:
Add new PCI MMIO based thermal driver [8086:461d] for Intel Alder Lake
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