From: "Richard W.M. Jones" <rjones@redhat.com>
To: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: qemu-devel@nongnu.org,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Gerd Hoffmann <kraxel@redhat.com>
Subject: Re: Compatibility between -device sga and -machine graphics=off
Date: Wed, 8 Sep 2021 17:33:52 +0100 [thread overview]
Message-ID: <20210908163352.GA12952@redhat.com> (raw)
In-Reply-To: <YTjf6BhpPU3aLct9@redhat.com>
Just commenting from the libguestfs POV:
We don't care about migration, and:
On Wed, Sep 08, 2021 at 05:08:08PM +0100, Daniel P. Berrangé wrote:
> On non-x86 emulators I see graphics=off has semantic effects beyond
> just controlling whether the firmware prints to the serial or not
> though. IOW it is overloaded to do multiple jobs, while -device sga
> only did one specific job. This makes graphics=off somewhat undesirable
> to use. We're possibly lucky in this specific case though, because
> the 'sgabios.bin' ROM is x86 asm code, so was never valid to use in
> the non-x86 case.
we only enable <bios useserial=yes/> on i686 & x86-64.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines. Supports shell scripting,
bindings from many languages. http://libguestfs.org
next prev parent reply other threads:[~2021-09-08 16:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-08 16:08 Compatibility between -device sga and -machine graphics=off Daniel P. Berrangé
2021-09-08 16:28 ` Paolo Bonzini
2021-09-08 16:36 ` Daniel P. Berrangé
2021-09-08 18:59 ` Paolo Bonzini
2021-09-08 16:33 ` Richard W.M. Jones [this message]
2021-09-08 20:50 ` Gerd Hoffmann
2021-09-08 22:10 ` Daniel P. Berrangé
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