linux-kernel - [PATCH v2 0/7] iommu/vt-d: Fix-up device-domain relationship by refactoring to use iommu group default domain.

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Message-Id: <83B82113-8AE5-4B0C-A079-F389520525BD@arista.com>
Date:   Thu, 14 Mar 2019 11:56:54 +0000
From:   James Sewart <jamessewart@...sta.com>
To:     iommu@...ts.linux-foundation.org
Cc:     Tom Murphy <tmurphy@...sta.com>, Dmitry Safonov <dima@...sta.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        linux-kernel@...r.kernel.org, Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v2 0/7] iommu/vt-d: Fix-up device-domain relationship by
 refactoring to use iommu group default domain.

Patches 1 and 2 are the same as v1.

v1-v2:
  Refactored ISA direct mappings to be returned by iommu_get_resv_regions.
  Integrated patch by Lu to defer turning on DMAR until iommu.c has mapped 
reserved regions.
  Integrated patches by Lu to remove more unused code in cleanup.

Lu: I didn't integrate your patch to set the default domain type as it 
isn't directly related to the aim of this patchset. Instead patch 4 
addresses the issue of a device requiring an identity domain by ignoring 
the domain param in attach_device and printing a warning.

I booted some of our devices with this patchset and haven't seen any 
issues. It doesn't look like we have any devices with RMRR's though so 
those codepaths aren't tested.

James Sewart (7):
  iommu: Move iommu_group_create_direct_mappings to after device_attach
  iommu/vt-d: Implement apply_resv_region for reserving IOVA ranges
  iommu/vt-d: Expose ISA direct mapping region via
    iommu_get_resv_regions
  iommu/vt-d: Ignore domain parameter in attach_device if device
    requires identity map
  iommu/vt-d: Allow IOMMU_DOMAIN_DMA to be allocated by iommu_ops
  iommu/vt-d: Remove lazy allocation of domains

Lu Baolu (1):
  iommu/vt-d: Enable DMA remapping after rmrr mapped

 drivers/iommu/intel-iommu.c | 444 +++++++++++-------------------------
 drivers/iommu/iommu.c       |   4 +-
 2 files changed, 131 insertions(+), 317 deletions(-)

-- 
2.17.1