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: Mon, 12 Sep 2011 14:35:51 +0200 [thread overview]
Message-ID: <20110912123551.GA11701@amd.com> (raw)
In-Reply-To: <F1FD01C1EFCE15408DBF59462450B3BD1C4658@039-SN1MPN1-006.039d.mgd.msft.net>
On Mon, Sep 12, 2011 at 08:08:41AM -0400, Sethi Varun-B16395 wrote:
> > The IOMMUs are usually devices on the bus itself, so they are initialized
> > after the bus is set up and the devices on it are populated. So the
> > function can not be called on bus initialization because the IOMMU is not
> > ready at this point.
> Well, at what point would the add_device_group (referring to patch set posted by Alex) call back be invoked?
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.
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
next prev parent reply other threads:[~2011-09-12 12:36 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 [this message]
2011-09-15 12:45 ` Sethi Varun-B16395
2011-09-15 13:13 ` Roedel, Joerg
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
-- strict thread matches above, loose matches on Subject: below --
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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