[PATCH v3 1/3] vdpa: Skip protected ram IOMMU mappings

From: "Eugenio Pérez" <eperezma@redhat.com>
To: qemu-devel@nongnu.org
Cc: Parav Pandit <parav@mellanox.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Jason Wang <jasowang@redhat.com>,
	virtualization@lists.linux-foundation.org,
	Stefan Hajnoczi <stefanha@redhat.com>,
	Eli Cohen <eli@mellanox.com>,
	Stefano Garzarella <sgarzare@redhat.com>
Subject: [PATCH v3 1/3] vdpa: Skip protected ram IOMMU mappings
Date: Tue, 12 Oct 2021 16:07:08 +0200	[thread overview]
Message-ID: <20211012140710.804529-2-eperezma@redhat.com> (raw)
In-Reply-To: <20211012140710.804529-1-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>
---
 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


