linux-kernel - Re: [PATCH 00/16 v2] iommu: Move domain allocation into drivers

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Date:	Tue, 31 Mar 2015 15:18:34 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Will Deacon <will.deacon@....com>
Cc:	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	Kukjin Kim <kgene@...nel.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Heiko Stuebner <heiko@...ech.de>,
	Hiroshi Doyu <hdoyu@...dia.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Arnd Bergmann <arnd@...db.de>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	"linux-rockchip@...ts.infradead.org" 
	<linux-rockchip@...ts.infradead.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"jroedel@...e.de" <jroedel@...e.de>
Subject: Re: [PATCH 00/16 v2] iommu: Move domain allocation into drivers

Hi Will,

On Mon, Mar 30, 2015 at 06:43:15PM +0100, Will Deacon wrote:
> Whilst I'm still a bit worried about the ability of the IOMMU driver to do
> very much in the ->domain_alloc callback (since we don't know which IOMMU
> instance the domain is for), it doesn't leave us any worse off than we
> currently are.

The IOMMU driver should just allocate the data-structures for a domain
in the domain_alloc call-back. It should not be necessary to care about
any relations of the domain with specific iommu instances.
 
> So, for the arm-smmu patch and the core IOMMU changes:
> 
>   Acked-by: Will Deacon <will.deacon@....com>

Thanks a lot!


	Joerg

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