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Bug 1918888

Summary: coresight backtraces when booting ThunderX2
Product: [Fedora] Fedora Reporter: Paul Whalen <pwhalen>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 33CC: acaringi, adscvr, airlied, alciregi, bskeggs, hdegoede, itamar, jarodwilson, jbastian, jeremy, jeremy.linton, jglisse, jonathan, josef, kernel-maint, lgoncalv, linville, masami256, mchehab, pbunyan, ptalbert, steved
Target Milestone: ---   
Target Release: ---   
Hardware: aarch64   
OS: Linux   
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Last Closed: Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 245418    
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Description Flags
dmesg.txt none

Description Paul Whalen 2021-01-21 16:31:07 UTC
1. Please describe the problem:

Coresight backtraces when booting ThunderX2

2. What is the Version-Release number of the kernel:

Seeing this in Rawhide and F33

3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :

5.10.0-98.fc33

4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:

Boot on ThunderX2

5. Does this problem occur with the latest Rawhide kernel? To install the
   Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
   ``sudo dnf update --enablerepo=rawhide kernel``:

Yes. 

6. Are you running any modules that not shipped with directly Fedora's kernel?:

No.

7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.

Comment 1 Paul Whalen 2021-01-21 16:33:52 UTC
Created attachment 1749451 [details]
dmesg.txt

Comment 2 Jeremy Linton 2021-01-21 18:28:30 UTC
Per Suzuki Poulose:

The bindings clearly show that the funnel descriptions are messed up. For e.g,

_SB.NOD1.CP00.THD0.ETM0
_SB.NOD1.CP08.THD0.ETM0
_SB.NOD1.CP08.THD1.ETM0
_SB.NOD1.CP08.THD2.ETM0
_SB.NOD1.CP08.THD3.ETM0
_SB_.NOD1.CP09.THD1.ETM0

They all "connect" to port 0 of the _SB.NOD1.FUN0. But if you look at the Node for NOD1.FUN0, it lists _SB.NOD1.CP00.THD0.ETM0 as the other end. It looks like a copy-paste error and has forgot to update the FUN for each of the items.