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Bug 1435681 - <console><log> doesn't work on aarch64
Summary: <console><log> doesn't work on aarch64
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libvirt
Version: 7.3
Hardware: aarch64
OS: Linux
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Andrea Bolognani
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 1456882
Blocks: 1173757
TreeView+ depends on / blocked
 
Reported: 2017-03-24 14:10 UTC by Andrea Bolognani
Modified: 2017-11-09 11:26 UTC (History)
7 users (show)

Fixed In Version: libvirt-3.2.0-16.el7a
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1456882 (view as bug list)
Environment:
Last Closed: 2017-11-09 11:26:03 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2017:3174 0 normal SHIPPED_LIVE libvirt enhancement update 2017-11-09 16:12:36 UTC

Description Andrea Bolognani 2017-03-24 14:10:14 UTC 
Configuring a guest with

  <console type='pty'>
    <log file='...'/>
  </console>

fails on aarch64 with

  error: unsupported configuration: logfile not supported
         in this QEMU binary

The underlying issue is that, unlike what happens for x86
and ppc64, the guest-side serial console (pl011) is
instantiated implicitly, even when -nodefaults is used, so
libvirt doesn't have a way to assign it a chardev with the
logfile property configured.
Comment 2 Andrea Bolognani 2017-03-24 14:35:02 UTC 
A way to work around the issue is to use the VirtIO-based
console instead:

  <console type='pty'>
    <log file='...'/>
    <target type='virtio'/>
  </console>

However, that has its own drawbacks, such as not being able
to access early boot or even the bootloader.
Comment 3 Andrea Bolognani 2017-06-27 05:33:26 UTC 
Cole just posted some patches for this upstream:

  https://www.redhat.com/archives/libvir-list/2017-June/msg01128.html
Comment 4 Andrea Bolognani 2017-07-11 06:47:39 UTC 
The fix has now been merged upstream.

commit 426dc5eb28bade109bf27bdd10d7305a040b4a3e
Author: Cole Robinson <crobinso>
Date:   Mon Jun 26 14:01:52 2017 -0400

    qemu: command: support -chardev for platform devices
    
    Some qemu arch/machine types have built in platform devices that
    are always implicitly available. For platform serial devices, the
    current code assumes that only old style -serial config can be
    used for these devices.
    
    Apparently though since -chardev was introduced, we can use -chardev
    in these cases, like this:
    
      -chardev pty,id=foo
      -serial chardev:foo
    
    Since -chardev enables all sorts of modern features, use this method
    for platform devices.
    
    Reviewed-by: Andrea Bolognani <abologna>
    Signed-off-by: Cole Robinson <crobinso>

v3.5.0-28-g426dc5e
Comment 7 Andrea Bolognani 2017-08-08 13:10:04 UTC 
I have confirmed the issue has indeed been addressed.

Please move this bug to VERIFIED.
Comment 8 Dan Zheng 2017-08-23 07:38:35 UTC 
Regarding comment 7,  we verify it now.
Comment 10 errata-xmlrpc 2017-11-09 11:26:03 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/RHEA-2017:3174
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