RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Bug 1434740 - OvmfPkg/PciHotPlugInitDxe: don't reserve IO space when IO support is disabled
Summary: OvmfPkg/PciHotPlugInitDxe: don't reserve IO space when IO support is disabled
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: ovmf
Version: 7.4
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: rc
: 7.4
Assignee: Laszlo Ersek
QA Contact: FuXiangChun
URL:
Whiteboard:
Depends On: 1344299 ovmf-rebase-rhel-7.5
Blocks: 1441550
TreeView+ depends on / blocked
 
Reported: 2017-03-22 09:46 UTC by Laszlo Ersek
Modified: 2018-04-10 16:30 UTC (History)
15 users (show)

Fixed In Version: ovmf-20171011-1.git92d07e48907f.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1344299
Environment:
Last Closed: 2018-04-10 16:28:00 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1430994 1 None None None 2021-01-20 06:05:38 UTC
Red Hat Bugzilla 1434747 0 high CLOSED [Q35] code12 error when hotplug XL710 device in win2016 2021-02-22 00:41:40 UTC
Red Hat Product Errata RHBA-2018:0902 0 None None None 2018-04-10 16:30:13 UTC

Internal Links: 1430994 1434747

Description Laszlo Ersek 2017-03-22 09:46:22 UTC 
+++ This bug was initially created as a clone of Bug #1344299 +++

OVMF currently reserves 512B of IO space (rounded up to 4KB) and 2MB of MMIO space for all kinds of PCI bridges, including legacy PCI bridges, PCI Express downstream ports, PCI Express upstream ports, and PCI Express root ports; for hotplug purposes. This reservation is only appropriate for legacy PCI bridges, however.

OVMF should be extended to recognize when the "IO base/limit registers" are zero, and reserve no IO space when that's the case.

Affected version: OVMF-20170228-1.gitc325e41585e3.el7.noarch.

Setting Severity and Priority to low/low, to match the same of clone-origin bug 1344299.
Comment 4 Laszlo Ersek 2017-09-25 20:00:21 UTC 
posted upstream series:

[edk2] [PATCH 0/7] OvmfPkg/PciHotPlugInitDxe: obey PCI resource reservation
                   hints from QEMU
https://lists.01.org/pipermail/edk2-devel/2017-September/015296.html
Message-Id: <20170925195824.10866-1-lersek>
Comment 5 Laszlo Ersek 2017-10-03 14:15:57 UTC 
(In reply to Laszlo Ersek from comment #4)
> posted upstream series:
> 
> [edk2] [PATCH 0/7] OvmfPkg/PciHotPlugInitDxe: obey PCI resource reservation
>                    hints from QEMU
> https://lists.01.org/pipermail/edk2-devel/2017-September/015296.html
> Message-Id: <20170925195824.10866-1-lersek>

1 8844f15d33c7 MdePkg/IndustryStandard/Pci23: add vendor-specific capability
               header
2 bdf73b57f283 OvmfPkg/IndustryStandard: define PCI Capabilities for QEMU's
               PCI Bridges
3 91231fc2ff2b OvmfPkg/PciHotPlugInitDxe: clean up protocol usage comment
4 c18ac9fbcc71 OvmfPkg/PciHotPlugInitDxe: clean up addr. range for
               non-prefetchable MMIO
5 a980324709b1 OvmfPkg/PciHotPlugInitDxe: generalize RESOURCE_PADDING
               composition
6 4776d5cb3abf OvmfPkg/PciHotPlugInitDxe: add helper functions for setting
               up paddings
7 fe4049471bdf OvmfPkg/PciHotPlugInitDxe: translate QEMU's resource
               reservation hints
Comment 6 Laszlo Ersek 2017-10-03 14:25:25 UTC 
Note to virt-QE: please see <https://bugzilla.redhat.com/show_bug.cgi?id=1434747#c20>.
Comment 8 FuXiangChun 2017-12-05 10:44:13 UTC 
According to comments https://bugzilla.redhat.com/show_bug.cgi?id=1344299#c27,

This bug is fixed.  will set the bug as verified.  If I am wrong, please correct me.
Comment 11 errata-xmlrpc 2018-04-10 16:28:00 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0902
Note You need to log in before you can comment on or make changes to this bug.