On 11/18/10 09:09, Gleb Natapov wrote:
On Wed, Nov 17, 2010 at 08:00:08PM +0200, Michael S. Tsirkin wrote:
If so: does qemu
emulate this correctly?
It mostly does.
I doubt it actually enables/disables the legacy vga ports.
I'll check when I have the time. We can fix it if it doesn't,
So many guests (all of them?) just assume that vga ports and
framebuffer is there. So what "fixing" this will buy us?
Nothing?
Certainly not for the qemu standard vga. The only way for guests is to
drive that one is via legacy vga ports and vesa vga bios. Hotplug is
never ever going to work here. Also the vga memory window @ 0xa0000
with the piix chipset interactions is good for some extra fun ...
cirrus might be fixable to be hotpluggable. It also can be programmed
via mmio bar instead of legacy vga ports, so having two cirrus cards in
one system might be possible to get work. I doubt it is worth the
trouble though.
I still think that vga cards should simply be flagged to be not
hot-pluggable.
cheers,
Gerd
