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

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Message-ID: <20150330174315.GD15655@arm.com>
Date:	Mon, 30 Mar 2015 18:43:15 +0100
From:	Will Deacon <will.deacon@....com>
To:	Joerg Roedel <joro@...tes.org>
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 Joerg,

On Thu, Mar 26, 2015 at 12:43:03PM +0000, Joerg Roedel wrote:
> Changes v1-v2:
> 
> 	* Rebased to v4.0-rc5
> 	* Converted domain-types to a bit-field
> 
> Hi,
> 
> here is patch-set to replace the existing domain_init and
> domain_destroy iommu-ops with the new domain_alloc and
> domain_free callbacks

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.

So, for the arm-smmu patch and the core IOMMU changes:

  Acked-by: Will Deacon <will.deacon@....com>

Hopefully this doesn't conflict too badly with my outstanding arm-smmu
pull requests to you, but do shout if you have any trouble.

Will
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