Re: [Qemu-devel] [Qemu-ppc] [PATCH] target-ppc: Change default machine for 64-bit

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Fri, 2013-06-14 at 16:28 +0200, Andreas Färber wrote:
> > I would still love to see -M mac99 emulate a proper U2 or U1 based
> system for 32bit. And I would also love to see a real U4 based
> emulation model come up for qemu-system-ppc64. But I doubt I'll have
> time to work on either :).

Uninorth itself is easy, the guests don't mess with it much, and we have
the infrastructure for iommu's nowadays. KL is the interesting bit. The
main missing piece of the puzzle is really a PMU device.

There are other bits in the chipset like GEM ethernet and the Frodo SATA
but:

  - They are probed using PCI probing, so not having them isn't a huge
deal.

  - A GEM emulation shouldn't be terribly hard, there's bunch of
registers manipulated by the driver that we can probably just ignore.

  - A Frodo emulation would be trivial considered that the driver
doesn't use anything but basic MMIO taskfile access (so does the MacOS
driver) and a bit of SCRs.

Now if only I had more spare time ... :-)

Cheers,
Ben.