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

From: Andreas Färber
Subject: Re: [Qemu-ppc] [Qemu-devel] [PATCH 0/9] Add platform bus
Date: Tue, 23 Jul 2013 01:03:38 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130620 Thunderbird/17.0.7

Am 23.07.2013 00:34, schrieb Peter Maydell:
> On 22 July 2013 23:05, Anthony Liguori <address@hidden> wrote:
>> Peter Maydell <address@hidden> 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.


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