Add a topology description to the virtio-iommu config space, allowing to
create a virtio-iommu device on platforms without device-tree. Our
long-term plan is to add an ACPI table that describes this topology, but
it will take a while to ratify. This built-in topology is needed anyway
for platforms that don't use either DT or ACPI (e.g. microvm) and can be
used as a temporary boot method for ACPI platforms as well.

Patch 1 looks unrelated, but is required to boot with a firmware on x86.
As previously discussed on this list:
https://lore.kernel.org/qemu-devel/aa5fa9e6-6efd-e1a3-96c6-d02ba8eab4c8@redhat.com/

This work depends on the proposed spec change for virtio-iommu (v2):
https://lists.oasis-open.org/archives/virtio-dev/202008/msg00067.html

And the Linux implementation (v3):
https://lore.kernel.org/linux-iommu/20200821131540.2801801-1-jean-philippe@linaro.org/

Eric Auger (1):
  hw/i386/pc: Add support for virtio-iommu-pci

Jean-Philippe Brucker (4):
  virtio-iommu: Default to bypass during boot
  linux headers: Import virtio-iommu header from Linux
  virtio-iommu: Declare topology in config space
  hw/arm/virt: Remove device-tree restriction on virtio-iommu

 include/hw/virtio/virtio-iommu.h              |  4 ++
 include/standard-headers/linux/virtio_iommu.h | 44 +++++++++++++
 hw/arm/virt.c                                 | 10 +--
 hw/i386/pc.c                                  |  9 ++-
 hw/virtio/virtio-iommu-pci.c                  |  2 -
 hw/virtio/virtio-iommu.c                      | 62 ++++++++++++++++---
 hw/virtio/trace-events                        |  4 +-
 7 files changed, 115 insertions(+), 20 deletions(-)

-- 
2.28.0