Here is another take on iommu_ops on POWER to make VFIO work again on POWERPC64. The tree with all prerequisites is here: https://github.com/aik/linux/tree/kvm-fixes-wip The previous discussion is here: https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20220707135552.3688927-1-aik@xxxxxxxxx/ https://patchwork.ozlabs.org/project/kvm-ppc/patch/20220701061751.1955857-1-aik@xxxxxxxxx/ Please comment. Thanks. Alexey Kardashevskiy (3): powerpc/iommu: Add "borrowing" iommu_table_group_ops powerpc/pci_64: Init pcibios subsys a bit later powerpc/iommu: Add iommu_ops to report capabilities and allow blocking domains arch/powerpc/include/asm/iommu.h | 6 +- arch/powerpc/include/asm/pci-bridge.h | 7 + arch/powerpc/platforms/pseries/pseries.h | 5 + arch/powerpc/kernel/iommu.c | 257 +++++++++++++++++++++- arch/powerpc/kernel/pci_64.c | 2 +- arch/powerpc/platforms/powernv/pci-ioda.c | 36 ++- arch/powerpc/platforms/pseries/iommu.c | 27 +++ arch/powerpc/platforms/pseries/setup.c | 3 + drivers/vfio/vfio_iommu_spapr_tce.c | 96 ++------ 9 files changed, 345 insertions(+), 94 deletions(-) -- 2.30.2
