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From: "Roedel, Joerg" <Joerg.Roedel@amd.com>
To: Sethi Varun-B16395 <B16395@freescale.com>
Cc: Joerg Roedel <joro@8bytes.org>, Greg KH <gregkh@suse.de>,
	"iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	Ohad Ben-Cohen <ohad@wizery.com>,
	David Woodhouse <dwmw2@infradead.org>,
	David Brown <davidb@codeaurora.org>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 02/10] Driver core: Add iommu_ops to bus_type
Date: Thu, 15 Sep 2011 15:13:47 +0200	[thread overview]
Message-ID: <20110915131347.GB11701@amd.com> (raw)
In-Reply-To: <F1FD01C1EFCE15408DBF59462450B3BD1CF87C@039-SN1MPN1-006.039d.mgd.msft.net>

On Thu, Sep 15, 2011 at 08:45:35AM -0400, Sethi Varun-B16395 wrote:
> > From: Roedel, Joerg [mailto:Joerg.Roedel@amd.com]
> > The details are up to Alex Williamson. One option is to register a
> > notifier for the bus in the iommu_bus_init() function and react to its
> > notifications.
> > I think in the end we will have a number of additional call-backs in the
> > iommu_ops which are called by the notifier (or from the driver-core
> > directly) to handle actions like added or removed devices. All the
> > infrastructure for that which is implemented in the iommu-drivers today
> > will then be in the iommu-core code.

> I am not sure If I understand this, but as per your earlier statement
> iommu is a device on the bus and its initialization would happen when
> bus is set up and devices are populated. So, when would device
> notifier call an iommu call back?

This is done in the iommu_bus_init() function. It will iterate over all
devices that are already on the bus and do the iommu specific
initialization on them. The devices added or removed later the notifier
will do the job.

	Joerg

-- 
AMD Operating System Research Center

Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach
General Managers: Alberto Bozzo, Andrew Bowd
Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632


  reply	other threads:[~2011-09-15 13:16 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-07 15:41 [PATCH 0/10] IOMMU: Make iommu_ops per-bus_type Joerg Roedel
2011-09-07 15:41 ` [PATCH 01/10] iommu/core: Define iommu_ops and register_iommu only with CONFIG_IOMMU_API Joerg Roedel
2011-09-07 15:41 ` [PATCH 02/10] Driver core: Add iommu_ops to bus_type Joerg Roedel
2011-09-07 18:47   ` Greg KH
2011-09-07 19:19     ` Joerg Roedel
2011-09-07 19:44       ` Greg KH
2011-09-07 20:37         ` Don Dutile
2011-09-08  8:58           ` Joerg Roedel
2011-09-08  8:41         ` Joerg Roedel
2011-09-12 11:40           ` Sethi Varun-B16395
2011-09-13 14:54         ` Roedel, Joerg
2011-09-13 14:58           ` Greg KH
2011-09-13 15:15             ` Roedel, Joerg
2011-09-13 15:38             ` Roedel, Joerg
2011-09-13 16:21               ` Greg KH
2011-09-14 12:46                 ` Roedel, Joerg
2011-09-12 12:08       ` Sethi Varun-B16395
2011-09-12 12:35         ` Roedel, Joerg
2011-09-15 12:45           ` Sethi Varun-B16395
2011-09-15 13:13             ` Roedel, Joerg [this message]
2011-09-07 15:41 ` [PATCH 03/10] iommu/core: Add bus_type parameter to iommu_domain_alloc Joerg Roedel
2011-09-12 11:50   ` Sethi Varun-B16395
2011-09-12 12:37     ` Roedel, Joerg
2011-09-07 15:41 ` [PATCH 04/10] iommu/core: Convert iommu_found to iommu_present Joerg Roedel
2011-09-07 15:41 ` [PATCH 05/10] iommu/core: Use bus->iommu_ops in the iommu-api Joerg Roedel
2011-09-07 15:41 ` [PATCH 06/10] iommu/amd: Use bus_set_iommu instead of register_iommu Joerg Roedel
2011-09-07 15:41 ` [PATCH 07/10] iommu/vt-d: " Joerg Roedel
2011-09-07 15:41 ` [PATCH 08/10] iommu/omap: " Joerg Roedel
2011-09-07 15:41 ` [PATCH 09/10] iommu/msm: " Joerg Roedel
2011-09-07 15:41 ` [PATCH 10/10] iommu/core: Remove global iommu_ops and register_iommu Joerg Roedel
2011-09-07 18:48 ` [PATCH 0/10] IOMMU: Make iommu_ops per-bus_type Greg KH
2011-09-07 19:29   ` Joerg Roedel
2011-09-22 16:14 [PATCH 0/10 v2] " Joerg Roedel
2011-09-22 16:14 ` [PATCH 02/10] Driver core: Add iommu_ops to bus_type Joerg Roedel
2011-09-22 20:11   ` Greg KH
2011-09-23 15:19     ` Roedel, Joerg
2011-09-23 15:45 [PATCH 0/10 v3] IOMMU: Make iommu_ops per-bus_type Joerg Roedel
2011-09-23 15:45 ` [PATCH 02/10] Driver core: Add iommu_ops to bus_type Joerg Roedel
2011-09-29 20:05   ` Greg KH
2011-09-30  6:24     ` Joerg Roedel
2011-09-30 13:58       ` Greg KH

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