@@ -749,6 +749,7 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
viommu_mapping *mapping;
viommu_interval interval;
bool read_fault, write_fault;
+ struct virtio_iommu_probe_resv_mem *reg;
interval.low = addr;
interval.high = addr + 1;
@@ -774,6 +775,21 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
goto unlock;
}
+ reg = g_tree_lookup(ep->reserved_regions, (gpointer)(&interval));
+ if (reg) {
+ switch (reg->subtype) {
+ case VIRTIO_IOMMU_RESV_MEM_T_MSI:
+ entry.perm = flag;
+ break;
+ case VIRTIO_IOMMU_RESV_MEM_T_RESERVED:
+ default:
+ virtio_iommu_report_fault(s, VIRTIO_IOMMU_FAULT_R_MAPPING,
+ 0, sid, addr);
+ break;
+ }
+ goto unlock;
+ }
+
if (!ep->domain) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s %02x:%02x.%01x not attached to any domain\n",
When translating an address we need to check if it belongs to a reserved virtual address range. If it does, there are 2 cases: - it belongs to a RESERVED region: the guest should neither use this address in a MAP not instruct the end-point to DMA on them. We report an error - It belongs to an MSI region: we bypass the translation. Signed-off-by: Eric Auger <eric.auger@redhat.com> --- hw/virtio/virtio-iommu.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)