Re: [Qemu-devel] Virtualbox svga card in KVM

[Sriram Murthy]

Some updates on this - 

I changed the PCI Device ID and Vendor ID in hw/vga.c, and was able to get the VirtualBox SVGA card driver installed in WinXP running on KVM.

However, when I try to change the resolution, KVM crashes with a SIGFPE in vbe_ioport_write_data(), and this is due to line_offset being zero in this statement -

      h = s->vram_size / line_offset 

Also, I am seeing that the line_offset is computed by reading the vbe_regs. So, is it that the driver in  the guest is programming the vbe regs?.

What should be the line_offset value, if the desired resolution is 800x600?

Regards,

Sriram

 

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From: Gerd Hoffmann <address@hidden>
To: Peter Maydell <address@hidden>
Cc: Sriram Murthy <address@hidden>; Stefan Hajnoczi <address@hidden>; qemu list <address@hidden>; "address@hidden" <address@hidden>
Sent: Monday, April 15, 2013 5:26 AM
Subject: Re: [Qemu-devel] Virtualbox svga card in KVM

On 04/08/13 17:11, Peter Maydell wrote:
> 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?

Not needed.  One just has to go write a windows driver.  The virtual
hardware can handle any resolution just fine.

cheers,
  Gerd