[v1] pc,pci,virtio: features, fixes

[PULL 16/29] vdpa: Skip protected ram IOMMU mappings

Michael S. Tsirkin posted 29 patches 4 years, 3 months ago

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Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Eric Auger <eric.auger@redhat.com>, Thomas Huth <thuth@redhat.com>, Ani Sinha <ani@anisinha.ca>, Laurent Vivier <lvivier@redhat.com>, Igor Mammedov <imammedo@redhat.com>, Coiby Xu <Coiby.Xu@gmail.com>, Juan Quintela <quintela@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Jason Wang <jasowang@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, "Michael S. Tsirkin" <mst@redhat.com>

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[PULL 16/29] vdpa: Skip protected ram IOMMU mappings

Posted by Michael S. Tsirkin 4 years, 3 months ago

From: Eugenio Pérez <eperezma@redhat.com>

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 <jasowang@redhat.com>
Message-Id: <20211014141236.923287-2-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
---
 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) ||
            /*
-- 
MST