These patches are to support vIOMMU in vdpa device

changes in V3
1. Move function vfio_get_xlat_addr to memory.c
2. Use the existing memory listener, while the MR is
iommu MR then call the function iommu_region_add/
iommu_region_del

changes in V4
1.make the comments in vfio_get_xlat_addr more general

changes in V5
1. Address the comments in the last version
2. Add a new arg in the function vfio_get_xlat_addr, which shows whether
the memory is backed by a discard manager. So the device can have its
own warning.

changes in V6
move the error_report for the unpopulated discard back to
memeory_get_xlat_addr

changes in V7
organize the error massage to avoid the duplicate information

changes in V8
Organize the code follow the comments in the last version

Cindy Lu (2):
  vfio: move implement of vfio_get_xlat_addr() to memory.c
  vhost-vdpa: add support for vIOMMU

 hw/vfio/common.c               | 101 +++++++--------------------
 hw/virtio/vhost-vdpa.c         | 123 ++++++++++++++++++++++++++++++---
 include/exec/memory.h          |   4 ++
 include/hw/virtio/vhost-vdpa.h |  10 +++
 softmmu/memory.c               |  72 +++++++++++++++++++
 5 files changed, 224 insertions(+), 86 deletions(-)

-- 
2.34.3