Thread (1 message) 1 message, 1 author, 2021-10-12

Re: [PATCH v2 1/3] vdpa: Skip protected ram IOMMU mappings

From: Jason Wang <hidden>
Date: 2021-10-12 03:48:10
Also in: qemu-devel

On Tue, Oct 5, 2021 at 9:49 PM Eugenio Pérez [off-list ref] wrote:
Following the logic of commit 56918a126ae ("memory: Add RAM_PROTECTED
flag to skip IOMMU mappings") with VFIO, skip memory sections
inaccessible via normal mechanisms, including DMA.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <redacted>
quoted hunk
---
 hw/virtio/vhost-vdpa.c | 1 +
 1 file changed, 1 insertion(+)
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 47d7a5a23d..ea1aa71ad8 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -28,6 +28,7 @@ static bool vhost_vdpa_listener_skipped_section(MemoryRegionSection *section)
 {
     return (!memory_region_is_ram(section->mr) &&
             !memory_region_is_iommu(section->mr)) ||
+            memory_region_is_protected(section->mr) ||
            /* vhost-vDPA doesn't allow MMIO to be mapped  */
             memory_region_is_ram_device(section->mr) ||
            /*
--
2.27.0
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