[Qemu-devel] [PATCH 00/12] IOMMU Infrastructure

[Benjamin Herrenschmidt]

This is a resend of the iommu series, mostly from Eduard
and David with the following changes:

 - Replaced the _zero functions with _set functions to
provide memset-like semantics and re-implemented in term
of cpu_physical_memory_rw() with a small local buffer

 - Removed the tracking of maps, instead added callbacks
for the iommu backend to optionally provide its own map
and unmap callbacks (to do its own tracking and synchronization)
with a default implementation based on using translate. We still
add the optional "cancel" argument to map, it will be used by
subsequent iommu backend implementations. The initial TCE
implementation uses the default implementation. I removed David's
previous "wait" mechanism.

 - Removed the memory barrier patch for now, we'll discuss it
separately