From f1f9365019bb257af087b454972c396bb0d53b26 Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Thu, 26 May 2016 09:43:23 -0600 Subject: [PATCH] vfio: Check that IOMMU MR translates to system address space At the moment IOMMU MR only translate to the system memory. However if some new code changes this, we will need clear indication why it is not working so here is the check. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson Signed-off-by: Alex Williamson --- hw/vfio/common.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index e2d5a8d9d5..e51ed3a348 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -269,6 +269,12 @@ static void vfio_iommu_map_notify(Notifier *n, void *data) trace_vfio_iommu_map_notify(iova, iova + iotlb->addr_mask); + if (iotlb->target_as != &address_space_memory) { + error_report("Wrong target AS \"%s\", only system memory is allowed", + iotlb->target_as->name ? iotlb->target_as->name : "none"); + return; + } + /* * The IOMMU TLB entry we have just covers translation through * this IOMMU to its immediate target. We need to translate -- 2.30.2