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charset="utf-8" Here we return the IOMMU address space if the device has S1 translation enabled by Guest. Otherwise return system address space. Signed-off-by: Shameer Kolothum Signed-off-by: Shameer Kolothum Reviewed-by: Nicolin Chen --- hw/arm/smmuv3-accel.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/hw/arm/smmuv3-accel.c b/hw/arm/smmuv3-accel.c index 790887ac31..f4e01fba6d 100644 --- a/hw/arm/smmuv3-accel.c +++ b/hw/arm/smmuv3-accel.c @@ -387,6 +387,26 @@ static void smmuv3_accel_unset_iommu_device(PCIBus *bu= s, void *opaque, } } =20 +static AddressSpace *smmuv3_accel_find_msi_as(PCIBus *bus, void *opaque, + int devfn) +{ + SMMUState *bs =3D opaque; + SMMUPciBus *sbus =3D smmu_get_sbus(bs, bus); + SMMUv3AccelDevice *accel_dev =3D smmuv3_accel_get_dev(bs, sbus, bus, d= evfn); + SMMUDevice *sdev =3D &accel_dev->sdev; + + /* + * If the assigned vfio-pci dev has S1 translation enabled by + * Guest, return IOMMU address space for MSI translation. + * Otherwise, return system address space. + */ + if (accel_dev->s1_hwpt) { + return &sdev->as; + } else { + return &address_space_memory; + } +} + static bool smmuv3_accel_pdev_allowed(PCIDevice *pdev, bool *vfio_pci) { =20 @@ -475,6 +495,7 @@ static const PCIIOMMUOps smmuv3_accel_ops =3D { .get_viommu_flags =3D smmuv3_accel_get_viommu_flags, .set_iommu_device =3D smmuv3_accel_set_iommu_device, .unset_iommu_device =3D smmuv3_accel_unset_iommu_device, + .get_msi_address_space =3D smmuv3_accel_find_msi_as, }; =20 void smmuv3_accel_init(SMMUv3State *s) --=20 2.43.0