[Qemu-devel] [PATCH 0/4] exec: reintroduce MemoryRegion caching

[Paolo Bonzini <pbonzini@redhat.com>]

MemoryRegionCache was reverted to "normal" address_space_* operations
for 2.9, due to lack of support for IOMMUs.  This series reinstates
optimizations, caching only the IOMMU translation but not the IOMMU
lookup and target AddressSpace translation.

Patches 1 to 3 prepare by introducing a new function
address_space_translate_iommu (split out of address_space_translate)
and new header files for declarations shared by regular and "cached"
address_space_* functions.  Patch 4 uses them to introduce both
the slow path for IOMMU and MMIO cached regions, and the fast path
for RAM cached regions.

Paolo

Paolo Bonzini (4):
  exec: move memory access declarations to a common header, inline
    *_phys functions
  exec: small changes to flatview_do_translate
  exec: extract address_space_translate_iommu, fix page_mask corner case
  exec: reintroduce MemoryRegion caching

 exec.c                                | 245 ++++++++++++++++++++------
 include/exec/cpu-all.h                |  79 ++++-----
 include/exec/memory-internal.h        |   3 +
 include/exec/memory.h                 | 209 ++++++++++------------
 include/exec/memory_ldst.inc.h        |  71 ++++++++
 include/exec/memory_ldst_cached.inc.h | 108 ++++++++++++
 include/exec/memory_ldst_phys.inc.h   | 147 ++++++++++++++++
 memory.c                              |   4 +-
 memory_ldst.inc.c                     | 126 -------------
 9 files changed, 651 insertions(+), 341 deletions(-)
 create mode 100644 include/exec/memory_ldst.inc.h
 create mode 100644 include/exec/memory_ldst_cached.inc.h
 create mode 100644 include/exec/memory_ldst_phys.inc.h

-- 
2.17.0