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Re: [Qemu-devel] Virtualbox svga card in KVM
From: |
Andreas Färber |
Subject: |
Re: [Qemu-devel] Virtualbox svga card in KVM |
Date: |
Tue, 09 Apr 2013 19:04:13 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130329 Thunderbird/17.0.5 |
Hi,
Am 08.04.2013 18:05, schrieb Sriram Murthy:
> The Virtualbox SVGA card was derived out of the KVM VGA card, so there are
> quite a few similarities (I am deliberately being vague here as I am still in
> the process of discovering the features of both these cards completely).
> Having said that, the APIs and the data structures themselves have been
> modified to add new features (like displaying a custom bmp as the VGA bootup
> logo) and it has a custom vga bios as well.
> Also, it is better that it be its own separate device model, so that
> maintenance of the vbox code becomes easier later. Further, I am thinking on
> the lines of retaining the VIrtualbox SVGA card code as is, and write a small
> KVM abstraction layer, so that it will be easy to port the bug fixes into the
> vbox SVGA card later on.
> Any comments/suggestions welcome here.
Personally, I think that the connection between VirtualBox and QEMU is
very unidirectional if there is any... So code-wise our focus should
rather be to avoid code copies/divergence within our tree and to share
code with existing in-tree devices, especially if you are not paid to
continuously take care of this device once accepted into QEMU - that's
how I interpret PMM's question below.
There is nothing generally wrong with using KVM for guest driver
development or to make existing stripped-down guest images work at all
by adding such a special device.
However, proposing to adopt a random vendor's paravirtual graphics card
just because it has a few more resolutions and drivers on a particular
platform does not strike me as a big advantage over SPICE, VMware VGA or
past virtio-vga/-fb standardization attempts.
Regards,
Andreas
>
> -Sriram
>
>
>
> ----- Original Message -----
> From: Peter Maydell <address@hidden>
> To: Sriram Murthy <address@hidden>
> Cc: Stefan Hajnoczi <address@hidden>; qemu list <address@hidden>;
> "address@hidden" <address@hidden>
> Sent: Monday, April 8, 2013 8:11 AM
> Subject: Re: [Qemu-devel] Virtualbox svga card in KVM
>
> On 6 April 2013 00:52, Sriram Murthy <address@hidden> wrote:
>> (actually, the virtualbox SVGA card is based off of the KVM VGA card)
>
> Is it possible to implement it as an extension to the VGA
> card device, or has it diverged incompatibly such that it
> has to be its own separate device model?
>
> thanks
> -- PMM
--
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- Re: [Qemu-devel] Virtualbox svga card in KVM, Sriram Murthy, 2013/04/01
- Re: [Qemu-devel] Virtualbox svga card in KVM, Sriram Murthy, 2013/04/02
- Re: [Qemu-devel] Virtualbox svga card in KVM, Stefan Hajnoczi, 2013/04/05
- Re: [Qemu-devel] Virtualbox svga card in KVM, Sriram Murthy, 2013/04/05
- Re: [Qemu-devel] Virtualbox svga card in KVM, Peter Maydell, 2013/04/08
- Re: [Qemu-devel] Virtualbox svga card in KVM, Sriram Murthy, 2013/04/08
- Re: [Qemu-devel] Virtualbox svga card in KVM,
Andreas Färber <=
- Re: [Qemu-devel] Virtualbox svga card in KVM, Sriram Murthy, 2013/04/09
- Re: [Qemu-devel] Virtualbox svga card in KVM, Stefan Hajnoczi, 2013/04/11
- Re: [Qemu-devel] Virtualbox svga card in KVM, Gerd Hoffmann, 2013/04/15
- Re: [Qemu-devel] Virtualbox svga card in KVM, Sriram Murthy, 2013/04/18
- Re: [Qemu-devel] Virtualbox svga card in KVM, Gerd Hoffmann, 2013/04/22
- Re: [Qemu-devel] Virtualbox svga card in KVM, Veruca Salt, 2013/04/24
- Re: [Qemu-devel] Virtualbox svga card in KVM, Yan Vugenfirer, 2013/04/09
- Re: [Qemu-devel] Virtualbox svga card in KVM, Sriram Murthy, 2013/04/09