From: Laine Stump <laine@redhat.com>
To: Markus Armbruster <armbru@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>, qemu list <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] default slot used for vga device on q35 machines
Date: Fri, 02 Aug 2013 12:46:45 -0400 [thread overview]
Message-ID: <51FBE275.6090804@redhat.com> (raw)
In-Reply-To: <87pptwimi9.fsf@blackfin.pond.sub.org>
On 08/02/2013 03:23 AM, Markus Armbruster wrote:
> Gerd Hoffmann <kraxel@redhat.com> writes:
>
>> Hi,
>>
>>> qemu-kvm -M q35 -nodefaults -nodefconfig -qmp unix:/tmp/qemu,server
>>> -vnc :15 -vga std -usb
>>>
>>> Then ran "query-pci" in the qmp monitor and found that the vga device is
>>> put at slot 1 instead of slot 2.
>>>
>>> My questions:
>>>
>>> 1) Is this difference intentional, or a bug?
>> The vga simply goes into the first free slot. That happens to be #2
>> with i440fx and #1 with q35.
> The slot used by -vga depends on the machine type, and can be expected
> to remain stable. We've kept it stable even for the machine type family
> i440FX.
>
> Nevertheless, if you require the graphics adapter to go into a specific
> slot, I very much recommend to control its placement with -device.
Right. We prefer explicitly specifying the pci address for everything,
but apparently in the case of multihead qxl devices, this isn't an
option (is this correct, or has there been a misunderstanding?)
next prev parent reply other threads:[~2013-08-02 18:25 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-01 19:37 [Qemu-devel] default slot used for vga device on q35 machines Laine Stump
2013-08-02 6:49 ` Gerd Hoffmann
2013-08-02 7:23 ` Markus Armbruster
2013-08-02 16:46 ` Laine Stump [this message]
2013-08-02 17:30 ` Markus Armbruster
2013-08-03 19:32 ` Laine Stump
2013-08-05 6:31 ` Gerd Hoffmann
2013-08-05 15:04 ` Eric Blake
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