From: "Woodhouse, David" <david.woodhouse@intel.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: "joerg.roedel@amd.com" <joerg.roedel@amd.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"chrisw@redhat.com" <chrisw@redhat.com>,
"agraf@suse.de" <agraf@suse.de>,
"dwg@au1.ibm.com" <dwg@au1.ibm.com>,
"scottwood@freescale.com" <scottwood@freescale.com>,
"B08248@freescale.com" <B08248@freescale.com>,
"benh@kernel.crashing.org" <benh@kernel.crashing.org>
Subject: Re: [PATCH 0/4] iommu: iommu_ops group interface
Date: Fri, 21 Oct 2011 20:34:19 +0000 [thread overview]
Message-ID: <1319229248.19448.6.camel@shinybook.infradead.org> (raw)
In-Reply-To: <20111021195412.8438.9951.stgit@s20.home>
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On Fri, 2011-10-21 at 13:55 -0600, Alex Williamson wrote:
> IOMMUs can't always distiguish transactions from each individual
> device in a system. Sometimes this is by design (such as powerpc
> partitionable endpoints), other times by topology (PCIe-to-PCI
> bridges masking downstream devices). We call these sets of
> indistinguishable devices "groups".
Other times it's because a multi-function PCIe device is broken and does
all its DMA from function zero.... like some Ricoh devices seen in
laptops. Can you handle quirks to "group" those too?
--
Sent with MeeGo's ActiveSync support.
David Woodhouse Open Source Technology Centre
David.Woodhouse@intel.com Intel Corporation
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next prev parent reply other threads:[~2011-10-21 20:34 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-21 19:55 Alex Williamson
2011-10-21 19:56 ` [PATCH 1/4] iommu: Add iommu_device_group callback and iommu_group sysfs entry Alex Williamson
2011-11-30 2:42 ` David Gibson
2011-11-30 4:51 ` Benjamin Herrenschmidt
2011-11-30 5:25 ` Alex Williamson
2011-11-30 9:23 ` Benjamin Herrenschmidt
2011-12-01 0:06 ` David Gibson
2011-12-01 6:20 ` Alex Williamson
2011-12-01 0:03 ` David Gibson
2011-12-01 0:52 ` Chris Wright
2011-12-01 0:57 ` David Gibson
2011-12-01 1:04 ` Chris Wright
2011-12-01 1:50 ` Benjamin Herrenschmidt
2011-12-01 2:00 ` David Gibson
2011-12-01 2:05 ` Chris Wright
2011-12-01 7:28 ` Alex Williamson
2011-12-01 14:02 ` Yoder Stuart-B08248
2011-12-01 6:48 ` Alex Williamson
2011-12-01 10:33 ` David Woodhouse
2011-12-01 14:34 ` Alex Williamson
2011-12-01 21:46 ` Benjamin Herrenschmidt
2011-12-01 22:37 ` Alex Williamson
2011-12-01 23:14 ` David Woodhouse
2011-12-07 6:20 ` Benjamin Herrenschmidt
2011-12-01 21:32 ` Benjamin Herrenschmidt
2011-10-21 19:56 ` [PATCH 2/4] intel-iommu: Implement iommu_device_group Alex Williamson
2011-11-08 17:23 ` Roedel, Joerg
2011-11-10 15:22 ` David Woodhouse
2011-10-21 19:56 ` [PATCH 3/4] amd-iommu: " Alex Williamson
2011-10-21 19:56 ` [PATCH 4/4] iommu: Add option to group multi-function devices Alex Williamson
2011-12-01 0:11 ` David Gibson
2011-10-21 20:34 ` Woodhouse, David [this message]
2011-10-21 21:16 ` [PATCH 0/4] iommu: iommu_ops group interface Alex Williamson
2011-10-21 22:39 ` Woodhouse, David
2011-10-21 22:34 ` Alex Williamson
2011-10-27 16:31 ` Alex Williamson
2011-11-15 15:51 ` Roedel, Joerg
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