Re: [Qemu-devel] [PATCH] hw/arm/virt: Allow zero address for PCI IO space

[Alexander Gordeev]

On Mon, Oct 12, 2015 at 10:03:03PM +0100, Peter Maydell wrote:
> On 12 October 2015 at 21:55, Alexander Gordeev <address@hidden> wrote:
> > Currently PCI IO address 0 is not allowed even though
> > the IO space starts from 0. As result, PCI IO is not
> > possible to use at all.
> 
> I don't see any reason for us not to allow 0 IO addresses,
> but I'm not sure how your your conclusion follows. It
> should be entirely possible to map PCI IO to some other
> address than zero in the IO window, which is what I would
> have expected the guest to do.

You are right - my changelog is incorrect. The rest of IO
space should be alright.

However, as 0 IO address is exposed via "ranges" to the guest,
it must be usable - isn't it? So it either should be allowed
or the range should be different.

Thanks!

> thanks
> -- PMM

-- 
Regards,
Alexander Gordeev
address@hidden