[OpenBIOS] [Qemu-ppc] [PATCH] ppc: Add MacOS VGA driver ROM

[Mark Cave-Ayland]

On 01/08/16 07:43, Benjamin Herrenschmidt wrote:

> On Mon, 2016-08-01 at 08:28 +0200, Howard Spoelstra wrote:
>>
>> Perhaps a bit misleading, but I meant the installation DVD boots to
>> the installer without the driver. It takes a long time before the
>> installer shows.
>> Picture is here: http://www.open.ou.nl/hsp/images/qemu/qemu_leopard.j
>> pg
>> I already have no keyboard at the OpenBIOS prompt when using
>> -usbdevice keyboard, so perhaps someone else has better luck.
> 
> One thing I noticed too is that the first boot after a 10.4 install
> takes a very very long time on the gray apple before making progress.
> 
> I'm not 100% certain at this stage but I *suspect* the kext cache
> isn't created, causing BootX to read all of their plists, which means
> doing a *lot* of file IOs via OpenBIOS, and I have the nagging feeling
> that it's a pretty slow path ;-)

Hmmm yes. That's a single sector read interface wrapped by deblocker so
it's not going to be amazingly fast. For comparison the posted virtio
driver puts the start sector, target address and length directly into
the descriptor so large reads there are reasonably efficient.


ATB,

Mark.