linux-kernel - Re: [PATCH 4/4] iommu: Add domain window handling functions

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Message-ID: <20130204130214.GN25591@8bytes.org>
Date:	Mon, 4 Feb 2013 14:02:14 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Sethi Varun-B16395 <B16395@...escale.com>
Cc:	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Wood Scott-B07421 <B07421@...escale.com>,
	Yoder Stuart-B08248 <B08248@...escale.com>
Subject: Re: [PATCH 4/4] iommu: Add domain window handling functions

On Thu, Jan 31, 2013 at 09:32:26AM +0000, Sethi Varun-B16395 wrote:
> We need a mechanism to determine the maximum number of subwindows supported by PAMU. How about representing it in the iommu_domain structure:
> struct  iommu_domain {
> 	struct iommu_ops *ops;
> 	void *priv;
> 	iommu_fault_handler_t handler;
> 	void *handler_token;
> 	struct iommu_domain_geometry geometry;
> 	u32 max_sub_windows; -----> maximum number of sub windows supported by the hardware.
> }

I`ll leave that flag to the private-data of the IOMMU domain. Instead I
added a DOMAIN_ATTR_WINDOWS attribute to get/set the number of
subwindows. I'll post the updated patch-set soon.


	Joerg


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