linux-kernel - Re: [PATCH 09/83] hsa/radeon: Add code base of hsa driver for AMD's GPUs

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Message-ID: <CAKMK7uG4kNe2sGftpiUM0JOtRNVgq5JnrO0Lkb4CDRaThRSVFw@mail.gmail.com>
Date:	Fri, 11 Jul 2014 19:40:32 +0200
From:	Daniel Vetter <daniel@...ll.ch>
To:	Jerome Glisse <j.glisse@...il.com>
Cc:	Oded Gabbay <oded.gabbay@...il.com>,
	Sandeep Nair <sandeep_n@...com>,
	Andrew Lewycky <Andrew.Lewycky@....com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	Kishon Vijay Abraham I <kishon@...com>,
	Andreas Noever <andreas.noever@...il.com>,
	Kenneth Heitke <kheitke@...eaurora.org>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Alex Deucher <alexander.deucher@....com>
Subject: Re: [PATCH 09/83] hsa/radeon: Add code base of hsa driver for AMD's GPUs

On Fri, Jul 11, 2014 at 7:04 PM, Jerome Glisse <j.glisse@...il.com> wrote:
> Are we to assume that for eternity this will not work on iommu that do support
> PASID/ATS but are not from AMD ? If it was an APU specific function i would
> understand but it seems that the IOMMU API needs to grow. I am pretty sure
> Intel will have an ATS/PASID IOMMU.

Also this isn't just for gpus - I hear noises that it e.g. could also
be used to virtualize a single ethernet NIC to different guest OS
directly. Adding ats/pasid support to the linux iommu interfaces
sounds like the right approach to me.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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