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Subject[PATCH 0/8] iommu/iova: Implement deferred flush queue
Date
Hi,

here is an implementation of deferred flush queues in the
common iova code. Some users of the iova code already
implement their own flush-queues, like the AMD-Vi and
Intel VT-d drivers.

The implementation adds a per-cpu ring-buffer to the
iova_domain structure and adds code to maintain that
ring-buffer.

A timer is also used to make sure pending entries in the
ring-buffer are flushed regularily, even when the
ring-buffers don't fill up.

The AMD and Intel IOMMU drivers are converted to make use of
this code and their own implementations for deferred
flushing are removed.

The code has been tested on an AMD and an Intel machine with
network and disk IO.

Please review.

Regards,

Joerg

Joerg Roedel (8):
iommu/iova: Add flush-queue data structures
iommu/iova: Implement Flush-Queue ring buffer
iommu/iova: Add flush counters to Flush-Queue implementation
iommu/iova: Add locking to Flush-Queues
iommu/iova: Add flush timer
iommu/amd: Make use of iova queue flushing
iommu/vt-d: Allow to flush more than 4GB of device TLBs
iommu/vt-d: Make use of iova deferred flushing

drivers/iommu/amd_iommu.c | 229 ++------------------------------------------
drivers/iommu/dmar.c | 2 +-
drivers/iommu/intel-iommu.c | 197 ++++++++-----------------------------
drivers/iommu/iova.c | 183 +++++++++++++++++++++++++++++++++++
include/linux/iova.h | 67 +++++++++++++
5 files changed, 298 insertions(+), 380 deletions(-)

--
2.7.4

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