On Sun, 2007-02-25 at 10:58 +0200, Avi Kivity wrote:
> I'm changing the kvm userspace interface to be more friendly to other
> archs. One issue is the PIO port size. x86 uses 16 bits to hold the
> port size (64K ports). Is that an issue for other archs?
>
> I guess I could change it to __u32, but it's better to know what various
> architectures actually require.
PowerPC doesn't have any such concept; access to ISA PIO is done by
having the bridge translate a particular range of MMIO accesses as PIO.
I'm no expert, but I don't know of any mainstream processor other than
x86 that supports PIO.
-Hollis
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