Bug 647307 (PCISlowMapping)

Summary:	Support slow mapping of PCI Bars
Product:	Red Hat Enterprise Linux 6	Reporter:	Glauber Costa <gcosta>
Component:	qemu-kvm	Assignee:	Alex Williamson <alex.williamson>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	high
Version:	6.1	CC:	ddutile, juzhang, mjenner, mkenneth, virt-maint, yang.z.zhang
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	qemu-kvm-0.12.1.2-2.119.el6	Doc Type:	Bug Fix
Doc Text:	KVM device assignment: Added support for devices making use of sub-4k MMIO PCI BARs.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-05-19 11:23:37 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	580954

Description Glauber Costa 2010-10-27 20:39:36 UTC

If we are mapping BARs that are smaller than 4k, we can't mmap it into memory.
For those cases, we would like to be able to have the option to use read/write abstraction instead.

Work to support it is already upstream (qemu-kvm.git), at commits:

8845b723
d79e4458
be5a9efb
c890e259

Comment 10 Alex Williamson 2011-02-22 15:08:00 UTC

*** Bug 679386 has been marked as a duplicate of this bug. ***

Comment 11 Alex Williamson 2011-03-09 18:48:37 UTC

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
KVM device assignment: Added support for devices making use of sub-4k MMIO PCI BARs.

Comment 12 errata-xmlrpc 2011-05-19 11:23:37 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0534.html

Comment 13 errata-xmlrpc 2011-05-19 12:49:43 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0534.html