In the Z-Architecture, the IOMMU information may change on a device basis. until this patch series we used hardcoded values to define the IOMMU aperture we provide to the guest during PCI enumeration.
Let's ask the host about the IOMMU specific configuration using VFIO capabilities. NOTES: 1- You will need the according Linux patch to test this. 2- I am really not happy to add S390 dedicated code in the VFIO common code, as do SPAPR, but I did not find a better solution. Any idea? Pierre Morel (3): vfio: Linux header placeholder vfio/pci: Get real IOMMU information from container s390x/pci: Reporting the host aperture to the guest hw/s390x/s390-pci-bus.c | 2 +- hw/s390x/s390-pci-bus.h | 3 ++ hw/s390x/s390-pci-inst.c | 20 ++++++++++-- hw/vfio/common.c | 75 +++++++++++++++++++++++++++++++++---------- include/hw/vfio/vfio-common.h | 3 ++ linux-headers/linux/vfio.h | 65 +++++++++++++++++++++++++++++++++++-- 6 files changed, 144 insertions(+), 24 deletions(-) -- 2.7.4
