[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH v2 0/3] seabios: add serial console support
|
From: |
Paolo Bonzini |
|
Subject: |
Re: [Qemu-devel] [PATCH v2 0/3] seabios: add serial console support |
|
Date: |
Tue, 5 Jul 2016 13:45:10 +0200 |
|
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 |
On 05/07/2016 12:07, Daniel P. Berrange wrote:
>> > What the final default behavior will be is not clear yet. Not enabled?
>> > Enabled in case no VGA is present? Enabled unconditionally (simliar to
>> > ovmf)?
> (Bitter) experiance in libvirt has shown us that magically enabling
> things based on whether or not some other feature is enabled leads
> to pain and suffering in the long term.
>
> So from libvirt's POV, we would like an explicit command line flag
> to turn on/off seabios serial console support, with no dependancy
> on whether VGA is present or not.
With my other proposal, "-machine graphics=no -device sga" should do it.
However, for libvirt to do this, it should stop using "-nographic" to
disable all display backends, and instead use "-display none". The
advantage is that neither "-display none" nor "-machine graphics=no" do
any magic redirection of the monitor and the serial ports to stdio.
"-display none" is supported since QEMU 1.0. For old QEMU without
query-command-line-options it can be scraped from help text; for new
QEMU with query-command-line-options it can be treated as always there.
Paolo