Bug 729506

Summary: pata_jmicron IDE device fails to init when IOMMU enabled
Product: [Fedora] Fedora Reporter: John <jdwoods>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED NEXTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 15CC: gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-06-07 11:35:08 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description John 2011-08-10 00:17:34 UTC 
Description of problem:
DVD's attached via pata_jmicron IDE generate a AMD-vi IO page fault and are not usable when IOMMU is seleted in BIOS.

Version-Release number of selected component (if applicable):
2.6.40-4.fc15.x86_64, ASUS M4A89TD Pro, AMI BIOS v2001, AMD Phenom II X6 1100T

How reproducible:
always on this config

Steps to Reproduce:
1.Enable IOMMU in BIOS
2.Boot F15 2.6.40-4.fc15.x86_64
3.
  
Actual results:
1. kernel log shows successful IOMMU init
2. kernel log shows pata_jmicron init causes AMD-vi IO page fault
3. DVDs are not usable ( can't read data cd/dvd can' burn DVD )
 
Expected results:
1. kernel log shows successful IOMMU init
2. kernel log shows successful pata_jmicron init
3. DVDs are fully functional

Additional info:
Disabling the IOMMU in BIOS and rebooting with no other changes results in successful init of pata_jmicron and fully functional DVDs. ( kernel reverts to GART IOMMU method)
Comment 1 Josh Boyer 2012-06-06 17:18:51 UTC 
The IOMMUs have been kind of a mess for a while.  Are you still seeing this with 2.6.43/3.3?
Comment 2 Josh Boyer 2012-06-07 11:35:08 UTC 
Received an email from the reporter saying things appear to function correctly in F17.