Re: [Xen-devel] [Qemu-devel] [PATCH 00/14] Remove old_portio users for memory region PIO mapping

[Andreas Färber <afaerber@xxxxxxx>]

Am 08.10.2012 14:23, schrieb Alexander Graf:
> When running on PowerPC, we don't have native PIO support. There are a few 
> hacks
> around to enable PIO access on PowerPC nevertheless.
> 
> The most typical one is the isa-mmio device. It takes MMIO requests and 
> converts
> them to PIO requests on the (QEMU internal) PIO bus.
> 
> This however is not how real hardware works and it limits us in the ability to
> spawn eventfd's on PIO ports which doesn't work with this approach.  Instead,
> let's model it more easily. Let's just map the PIO memory region into MMIO
> space.
> 
> For this to work, we need to get rid of all old_portio struct users, as they
> break with this approach. This is what this patch set does.

Looks sensible to me as far as reviewed, but I'm missing a patch 13 that
actually rips out old_portio afterwards. :)

Andreas

> It also converts
> the e500 machines and sPAPR to the new memory region model.
> 
> 
> Alex

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