Bug 2128235

Summary:	[s390x][RHEL9] [s390x-ccw bios] lacking document about parameter loadparm in qemu
Product:	Red Hat Enterprise Linux 9	Reporter:	bfu <bfu>
Component:	qemu-kvm	Assignee:	Thomas Huth <thuth>
qemu-kvm sub component:	General	QA Contact:	bfu <bfu>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	low
Priority:	low	CC:	cohuck, coli, dhorak, jinzhao, juzhang, knoel, lijin, mrezanin, pbonzini, ribarry, smitterl, stefanha, thuth, vgoyal, virt-maint, virt-qe-z, yiwei
Version:	9.1	Keywords:	Triaged
Target Milestone:	rc
Target Release:	9.2
Hardware:	s390x
OS:	Linux
Whiteboard:
Fixed In Version:	qemu-kvm-7.2.0-1.el9	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-09 07:20:41 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:	7.2.0
Embargoed:

Description bfu 2022-09-20 10:17:44 UTC

Description of problem:
Seems we have a undocumented parameter named 'loadparm' in qemu

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
[root@kernelqe2 io-github-autotest-qemu]#  /usr/libexec/qemu-kvm -machine s390-ccw-virtio,? | grep -i loadparm

2. man qemu-kvm and search for loadparm




Actual results:
1. [root@kernelqe2 io-github-autotest-qemu]# 
2. Patter not found in qemu-kvm manpage

Expected results:
there should be related information in return messages

Additional info:

Comment 1 Thomas Huth 2022-11-15 10:14:28 UTC

Patch suggested here:
https://lore.kernel.org/qemu-devel/20221114132502.110213-1-thuth@redhat.com/

The output of "-machine s390-ccw-virtio,help" will be fixed with this patch here:
https://gitlab.com/qemu-project/qemu/-/commit/1fd396e32288bbf536483c74b68cb3ee86005a9f

Comment 2 Thomas Huth 2022-11-18 07:41:05 UTC

Patch has been merged upstream:

https://gitlab.com/qemu-project/qemu/-/commit/be5df2edb5d69ff3107c5616aa

... we'll get this in RHEL9 with the rebase of qemu-kvm to version 7.2.0, so I'm setting the status to POST now.

Comment 6 bfu 2022-12-27 06:07:12 UTC

Test environment:
qemu-kvm-7.2.0-2.el9.s390x

Test result:
/usr/libexec/qemu-kvm -machine s390-ccw-virtio,? | grep -i loadparm
  loadparm=<loadparm>    - Up to 8 chars in set of [A-Za-z0-9. ] (lower case chars converted to upper case) to pass to machine loader, boot manager, and guest kernel

set verified to this bz

Comment 10 errata-xmlrpc 2023-05-09 07:20:41 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 (Moderate: qemu-kvm security, bug fix, and enhancement update), 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/RHSA-2023:2162