Re: [kvm-devel] PIO port width on various archs?

[Hollis Blanchard]

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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/