linux-kernel - [PATCH v3 00/14] iommu: Permit modular builds of ARM SMMU[v3] drivers

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Date:   Thu, 21 Nov 2019 11:49:04 +0000
From:   Will Deacon <will@...nel.org>
To:     iommu@...ts.linuxfoundation.org, linux-kernel@...r.kernel.org
Cc:     Will Deacon <will@...nel.org>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        John Garry <john.garry@...wei.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Saravana Kannan <saravanak@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Isaac J. Manjarres" <isaacm@...eaurora.org>,
        Robin Murphy <robin.murphy@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Joerg Roedel <joro@...tes.org>
Subject: [PATCH v3 00/14] iommu: Permit modular builds of ARM SMMU[v3] drivers

Hi everyone,

This is version three of the patches I previously posted here:

  v1: https://lore.kernel.org/lkml/20191030145112.19738-1-will@kernel.org/
  v2: https://lore.kernel.org/lkml/20191108151608.20932-1-will@kernel.org

Changes since v2 include:

  * Tested successfully on real hardware (!)
  * Handle re-registering of IOMMU bus ops
  * Unregister IOMMU on unload
  * Prevent forced unbinding of SMMU drivers via sysfs
  * Update my email address in MODULE_AUTHOR

Note that if you want to rely on the 'of_devlink' support in linux-next
for dependent probe ordering, then you'll need an extra patch [1] to
support PCI devices upstream of an SMMU. I'm routing that one via Greg.

Will

[1] https://lore.kernel.org/lkml/20191120190028.4722-1-will@kernel.org

Cc: Jean-Philippe Brucker <jean-philippe@...aro.org>
Cc: Jordan Crouse <jcrouse@...eaurora.org>
Cc: John Garry <john.garry@...wei.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Saravana Kannan <saravanak@...gle.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: "Isaac J. Manjarres" <isaacm@...eaurora.org>
Cc: Robin Murphy <robin.murphy@....com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Joerg Roedel <joro@...tes.org>

--->8

Will Deacon (14):
  drivers/iommu: Export core IOMMU API symbols to permit modular drivers
  iommu/of: Request ACS from the PCI core when configuring IOMMU linkage
  PCI: Export pci_ats_disabled() as a GPL symbol to modules
  drivers/iommu: Take a ref to the IOMMU driver prior to ->add_device()
  iommu/of: Take a ref to the IOMMU driver during ->of_xlate()
  drivers/iommu: Allow IOMMU bus ops to be unregistered
  Revert "iommu/arm-smmu: Make arm-smmu-v3 explicitly non-modular"
  Revert "iommu/arm-smmu: Make arm-smmu explicitly non-modular"
  iommu/arm-smmu: Prevent forced unbinding of Arm SMMU drivers
  iommu/arm-smmu-v3: Unregister IOMMU and bus ops on device removal
  iommu/arm-smmu-v3: Allow building as a module
  iommu/arm-smmu: Unregister IOMMU and bus ops on device removal
  iommu/arm-smmu: Allow building as a module
  iommu/arm-smmu: Update my email address in MODULE_AUTHOR()

 drivers/iommu/Kconfig       |  16 ++++-
 drivers/iommu/Makefile      |   3 +-
 drivers/iommu/arm-smmu-v3.c |  93 +++++++++++++++++---------
 drivers/iommu/arm-smmu.c    | 127 +++++++++++++++++++++++++-----------
 drivers/iommu/iommu-sysfs.c |   5 ++
 drivers/iommu/iommu.c       |  32 ++++++++-
 drivers/iommu/of_iommu.c    |  17 +++--
 drivers/pci/pci.c           |   1 +
 include/linux/iommu.h       |   2 +
 9 files changed, 215 insertions(+), 81 deletions(-)

-- 
2.24.0.432.g9d3f5f5b63-goog