Re: [Qemu-devel] [PATCH 0/9] Add platform bus

["Andreas Färber" <afaerber@suse.de>]

Am 23.07.2013 00:34, schrieb Peter Maydell:
> On 22 July 2013 23:05, Anthony Liguori <anthony@codemonkey.ws> wrote:
>> Peter Maydell <peter.maydell@linaro.org> writes:
>>> We don't currently have any PCI host controller which is:
>>> (a) for ARM
>>
>> In QEMU?  You can make one super easily by just extending PCIHostState.
>>
>> It's just a matter of mapping the index and data registers somewhere.
> 
> That's a model of some random nonexistent thing, not a model
> of a piece of hardware or silicon that actually exists and
> thus that there's some hope the kernel might someday maybe
> be able to drive properly.
> 
>> I can't believe it's that hard to get this working in Linux either.
> 
> Actual ARM hardware with PCI is rare; the overlap of
> that with "ARM hardware we model in QEMU" is pretty near
> zero. And we demonstrably can't get the kernel folks to write
> working driver code for a PCI controller that only exists in
> QEMU -- just look at the trainwreck which is the versatile PCI
> kernel code.

FWIW the Nvidia Tegra3 SoC has PCIe, e.g., the Toradex Apalis T30 SoM.
With the Ixora board that's coming into affordable territory for devs.

Andreas

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