Re: [Qemu-devel] vga-pci and MMIO BAR

[Avi Kivity]

On 07/25/2012 04:41 PM, Benjamin Herrenschmidt wrote:
> On Wed, 2012-07-25 at 15:48 +0300, Avi Kivity wrote:
>> >> If not, we can add a second BAR, but it should disappear when running an
>> >> older machine type.
>> > 
>> > Well, the IO ports in legacy space are still there. We can also make the
>> > "register BAR" exist in both mode or we can add a second BAR and have
>> > x86 "prefer" IO... whatever rocks your boat as long as it's a BAR, it's
>> > the legacy hole that's annoying for me :-)
>> 
>> A guest created with -M old must look exactly the same as it did in an
>> older version of qemu, no extra BARs.
> 
> Why ? Who cares ? Especially with vga -std which nobody uses in practice
> on x86...

We'll find out who cares when we break it.

We have a system in place to prevent intentional breakage, let's use it.

-- 
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