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Re: [Qemu-devel] vfio for platform devices - 9/5/2012 - minutes


From: Sethi Varun-B16395
Subject: Re: [Qemu-devel] vfio for platform devices - 9/5/2012 - minutes
Date: Mon, 9 Sep 2013 09:18:37 +0000

Hi Will,
Just trying to understand the scope of platform device assignment to guest on 
ARM. So, are the AMBA devices also represented in the device tree?

Regards
Varun

> -----Original Message-----
> From: address@hidden [mailto:kvm-ppc-
> address@hidden On Behalf Of Will Deacon
> Sent: Monday, September 09, 2013 2:23 PM
> To: Yoder Stuart-B08248
> Cc: Sethi Varun-B16395; Wood Scott-B07421; Bhushan Bharat-R65777; 'Peter
> Maydell'; 'Santosh Shukla'; 'Alex Williamson'; 'Alexander Graf';
> 'Antonios Motakis'; 'Christoffer Dall'; 'address@hidden';
> address@hidden; address@hidden; qemu-
> address@hidden
> Subject: Re: vfio for platform devices - 9/5/2012 - minutes
> 
> On Fri, Sep 06, 2013 at 07:20:19PM +0100, Yoder Stuart-B08248 wrote:
> > Adding Will...
> 
> [...]
> 
> > > I have a query about the ARM SMMU driver. In the ARM smmu driver I
> > > see, that bus notifiers are registered for both amba and platform
> > > bus. Amba is the I/O interconnect, right? Why is bus notifier
> > > required for the amba bus?
> 
> Not sure I follow the question, really. If you have a DMA master
> registered as an AMBA device (e.g. PL330) and it wants to use an SMMU,
> then you need to be registered on that bus.
> 
> What would you prefer instead?
> 
> Will
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