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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: kevin.tian@intel.com, ashok.raj@intel.com,
	linux-kernel@vger.kernel.org, Daniel Drake <drake@endlessm.com>,
	iommu@lists.linux-foundation.org,
	Robin Murphy <robin.murphy@arm.com>,
	Christoph Hellwig <hch@lst.de>,
	Derrick Jonathan <jonathan.derrick@intel.com>
Subject: [PATCH v4 0/3] Replace private domain with per-group default domain
Date: Wed,  6 May 2020 09:59:44 +0800
Message-ID: <20200506015947.28662-1-baolu.lu@linux.intel.com> (raw)

Some devices are required to use a specific type (identity or dma) of
default domain when they are used with a vendor iommu. When the system
level default domain type is different from it, the vendor iommu driver
has to request a new default domain with either
iommu_request_dma_domain_for_dev() or iommu_request_dm_for_dev() in the
add_dev() callback. Unfortunately, these two helpers only work when the
group hasn't been assigned to any other devices, hence, some vendor iommu
driver has to use a private domain if it fails to request a new default
one.

Joerg proposed an on-going proposal which makes the default domain
framework to support configuring per-group default domain during boot
process.

https://lkml.org/lkml/2020/4/14/616
[This has been applied in iommu/next.]

Hence, there is no need to keep the private domain implementation
in the Intel IOMMU driver. This patch series aims to remove it.

Best regards,
baolu

Change log:
v3->v4:
 - Make the commit message of the first patch more comprehensive.

v2->v3:
 - Port necessary patches on the top of Joerg's new proposal.
   https://lkml.org/lkml/2020/4/14/616
   The per-group default domain proposed previously in this series
   will be deprecated due to a race concern between domain switching
   and device driver probing.

v1->v2:
 - Rename the iommu ops callback to def_domain_type

Lu Baolu (3):
  iommu/vt-d: Allow 32bit devices to uses DMA domain
  iommu/vt-d: Allow PCI sub-hierarchy to use DMA domain
  iommu/vt-d: Apply per-device dma_ops

 drivers/iommu/intel-iommu.c | 396 +++---------------------------------
 1 file changed, 26 insertions(+), 370 deletions(-)

-- 
2.17.1

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Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-06  1:59 Lu Baolu [this message]
2020-05-06  1:59 ` [PATCH v4 1/3] iommu/vt-d: Allow 32bit devices to uses DMA domain Lu Baolu
2020-05-06  1:59 ` [PATCH v4 2/3] iommu/vt-d: Allow PCI sub-hierarchy to use " Lu Baolu
2020-05-06  1:59 ` [PATCH v4 3/3] iommu/vt-d: Apply per-device dma_ops Lu Baolu
2020-05-06  2:09 ` [PATCH v4 0/3] Replace private domain with per-group default domain Daniel Drake
2020-05-06 17:50   ` Derrick, Jonathan
2020-05-10 23:16 ` Lu Baolu
2020-05-12 17:05 ` Jerry Snitselaar
2020-05-13  8:51 ` Joerg Roedel

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