[Qemu-devel] [PATCH 0/4] AMD IOMMU v1

[David Kiarie <davidkiarie4@gmail.com>]

David (4):
  hw/core: Add iommu to machine properties
  hw/pci-host: Add AMD IOMMU to PIIX and Q35 pcs
  hw/i386: Introduce AMD IOMMU
  hw/acpi: ACPI table for AMD IOMMU

 hw/core/machine.c           |   25 +
 hw/i386/Makefile.objs       |    1 +
 hw/i386/acpi-build.c        |   85 +++
 hw/i386/amd_iommu.c         | 1266 +++++++++++++++++++++++++++++++++++++++++++
 hw/i386/amd_iommu.h         |  363 +++++++++++++
 hw/pci-host/piix.c          |   10 +
 hw/pci-host/q35.c           |   10 +
 include/hw/acpi/acpi-defs.h |   55 ++
 include/hw/boards.h         |    2 +
 9 files changed, 1817 insertions(+)
 create mode 100644 hw/i386/amd_iommu.c
 create mode 100644 hw/i386/amd_iommu.h


AMD IOMMU v1

Changes since RFC
    -code cleanup around MMIO code
    -compacted startup code - some of the 'init' and 'reset' code is similar and can be reused
    -Implemented basic IOTLB - it's just a hashtable of already requested virtual address translations whereby if a device requests translation of the same address we don't have to do a page walk, again.
    -Implemented event logging - this version logs about all possible SW/HW errors but most of them are very unlikely to occur.
    -Changed GVA and HVA to go by the physical host bus implementations - 48 bits virtual and 40 bits physical address space.

TODO
   -Implement MMIO reserving code
   -Implement r/wc MMIO registers
   -Implement interrupts related to r/wc registers

IOMMU won't be able to implement PPR logging with the current Qemu infrastructure - Qemu doesn't implement anything that's related to PASID. Similary, guest translation won't be possible.

Note: I have not tested this code and it might have a few bugs (silly bugs) of course but the RFC version works so, if present, it's just minor bugs.
-- 
2.1.4