|From:||Alex Williamson <email@example.com>|
|Subject:||[RFC PATCH 0/3] IOMMU groups|
|Date:||Mon, 02 Apr 2012 15:14:32 -0600|
|Cc:||firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com|
This series attempts to make IOMMU device grouping a slightly more integral part of the device model. iommu_device_groups were originally introduced to support the VFIO user space driver interface which needs to understand the granularity of device isolation in order to ensure security of devices when assigned for user access. This information was provided via a simple group identifier from the IOMMU driver allowing VFIO to walk devices and assemble groups itself. The feedback received from this was that groups should be the effective unit of work for the IOMMU API. The existing model of allowing domains to be created and individual devices attached ignores many of the restrictions of the IOMMU, whether by design, by topology or by defective devices. Additionally we should be able to use the grouping information at the dma ops layer for managing domains and quirking devices. This series is a sketch at implementing only those aspects and leaving everything else about the multifaceted hairball of Isolation groups for another API. Please comment and let me know if this seems like the direction we should be headed. Thanks, Alex --- Alex Williamson (3): iommu: Create attach/detach group interface iommu: Create basic group infrastructure and update AMD-Vi & Intel VT-d iommu: Introduce iommu_group drivers/iommu/amd_iommu.c | 50 ++++++---- drivers/iommu/intel-iommu.c | 76 ++++++++-------- drivers/iommu/iommu.c | 210 ++++++++++++++++++++++++++++++++++++++----- include/linux/device.h | 2 include/linux/iommu.h | 43 +++++++++ 5 files changed, 301 insertions(+), 80 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to firstname.lastname@example.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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