[Qemu-devel] [PATCH v3 0/3] Qemu: add Xen vIOMMU interrupt remapping function support

[Chao Gao <chao.gao@intel.com>]

This patchset is to deal with MSI interrupt remapping request when guest
updates MSI registers.

In case of conflicts, this series also can be found in my personal github:
Xen: https://github.com/gc1008/viommu_xen.git vIOMMU4
Qemu: https://github.com/gc1008/viommu_qemu.git vIOMMU3

Any comments would be highly appreciated. And below is the change histroy

Changes from v2:
In last version, a new interface is used for binding a guest remappable msi
with a physical interrupt, while the old interface is used for binding
non-remappable msi. But for AMD, only from the MSI message itself, the
interrupt format cannot be infered. To address this, we decide to pass the
whole guest msi message to Xen and let vIOMMUs in Xen detemine whether
an given interrupt is remappable or not.
So the following changes are made:
- Instead of introducing a new interface for binding remapping format msi,
the exist interface is modified to support msi of both format.
- In patch 3, define MSI_ADDR_IF_MASK inside a function because
it is intel-specific. It is improper to define it in a common header.

Chao Gao (3):
  i386/msi: Correct mask of destination ID in MSI address
  xen/pt: Pass the whole msi addr/data to Xen
  msi: Handle remappable format interrupt request

 hw/i386/xen/xen-hvm.c         | 10 ++++++++-
 hw/pci/msi.c                  |  5 +++--
 hw/pci/msix.c                 |  4 +++-
 hw/xen/xen_pt_msi.c           | 49 ++++++++++++-------------------------------
 include/hw/i386/apic-msidef.h |  2 +-
 include/hw/xen/xen.h          |  2 +-
 stubs/xen-hvm.c               |  2 +-
 7 files changed, 31 insertions(+), 43 deletions(-)

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1.8.3.1