[PATCH for-8.1 0/6] Fix endianness issues in the intel-iommu device

[Thomas Huth]

The intel-iommu device is currently unusable on big endian hosts.
When doing something like this on a s390x host:

 wget 
https://download.fedoraproject.org/pub/fedora/linux/releases/38/Server/x86_64/images/Fedora-Server-KVM-38-1.6.x86_64.qcow2
 ./qemu-system-x86_64 -M q35 -device intel-iommu -m 2G \
        -hda ~/Fedora-Server-KVM-38-1.6.x86_64.qcow2 -trace "vtd_*"

... the guest kernel crashes during boot, complaining about some
problems with the iommu, and you can see clearly in the traces that
some values are wrong when compared to running this on a x86 host.

After spending quite some time hunting down the problems one by one,
I think I now found them all - at least I can successfully boot the
above kernel after I applied these patches.

Thomas Huth (6):
  hw/i386/intel_iommu: Fix trivial endianness problems
  hw/i386/intel_iommu: Fix endianness problems related to
    VTD_IR_TableEntry
  hw/i386/intel_iommu: Fix struct VTDInvDescIEC on big endian hosts
  hw/i386/intel_iommu: Fix index calculation in
    vtd_interrupt_remap_msi()
  hw/i386/x86-iommu: Fix endianness issue in
    x86_iommu_irq_to_msi_message()
  include/hw/i386/x86-iommu: Fix struct X86IOMMU_MSIMessage for big
    endian hosts

 hw/i386/intel_iommu_internal.h |  9 ++++++
 include/hw/i386/intel_iommu.h  | 50 ++++++++++++++++++----------------
 include/hw/i386/x86-iommu.h    | 50 ++++++++++++++++++----------------
 hw/i386/intel_iommu.c          | 23 ++++++++++------
 hw/i386/x86-iommu.c            |  2 +-
 5 files changed, 76 insertions(+), 58 deletions(-)

-- 
2.39.3