Bug 204803

Summary: DMAR fault on dell machine LPC Controller
Product: Drivers Reporter: Todd Brandt (todd.e.brandt)
Component: IOMMUAssignee: drivers_iommu
Status: NEW ---    
Severity: normal    
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 5.0.0 Subsystem:
Regression: No Bisected commit-id:
Bug Depends on:    
Bug Blocks: 178231    
Attachments: issue.def
otcpl-dell-p5510-xeon-1_mem.html
otcpl-dell-p3520_mem.html
issue.def

Description Todd Brandt 2019-09-09 19:01:12 UTC
Created attachment 284899 [details]
issue.def

Occurs in dmesg log for every suspend/resume mem run (S3).

[  173.528146] DMAR: DRHD: handling fault status reg 2
[  173.528150] DMAR: [INTR-REMAP] Request device [f0:1f.0] fault index 0 [fault reason 37] Blocked a compatibility format interrupt request

This one has been here for quite some time, since at least 5.0.0. It's just a warning printed in the dmesg log which doesn't appear to cause any performance or functional impairment. I'm adding this bug to track the issue with an issue.def file.
Comment 1 Todd Brandt 2019-09-09 19:05:30 UTC
Created attachment 284901 [details]
otcpl-dell-p5510-xeon-1_mem.html
Comment 2 Todd Brandt 2019-09-09 19:08:31 UTC
Created attachment 284903 [details]
otcpl-dell-p3520_mem.html
Comment 3 Todd Brandt 2020-08-05 15:33:51 UTC
Created attachment 290781 [details]
issue.def