Re: [Qemu-devel] [PATCH 1/8] Support PCI based option rom loading

[Anthony Liguori]

Blue Swirl wrote:
> On Fri, Dec 18, 2009 at 11:01 AM, Gerd Hoffmann <address@hidden> wrote:
>   
> > From: Anthony Liguori <address@hidden>
> >
> > Currently, we preload option roms into the option rom space in memory.  This
> > prevents DDIM from functioning correctly which severely limits the number
> > of roms we can support.
> >
> > This patch introduces a pci_add_option_rom() which registers the
> > PCI_ROM_ADDRESS bar which points to our option rom.  It also converts over
> > the cirrus vga adapter, the rtl8139, virtio, and the e1000 to use this
> > new mechanism.
> >     
>
> This means that the VGA roms are now visible for all targets, not just
> when rom_enable_driver_roms is true. I'm not opposing this, but it may
> create regressions.
>   

This is pretty normal on bare metal though, no?  I thought a lot of 
non-x86 systems actually use x86 emulators specifically to enable 
support for these roms.

Regards,

Anthony Liguori