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vhost-vdpa: Add support for vIOMMU.

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1. The vIOMMU support will make vDPA can work in IOMMU mode. This
will fix security issues while using the no-IOMMU mode.
To support this feature we need to add new functions for IOMMU MR adds and
deletes.

Also since the SVQ does not support vIOMMU yet, add the check for IOMMU
in vhost_vdpa_dev_start, if the SVQ and IOMMU enable at the same time
the function will return fail.

2. Skip the iova_max check vhost_vdpa_listener_skipped_section(). While
MR is IOMMU, move this check to vhost_vdpa_iommu_map_notify()

Verified in vp_vdpa and vdpa_sim_net driver

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20230510054631.2951812-5-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Cindy Lu 2023-05-10 13:46:31 +08:00 • committed by Michael S. Tsirkin
parent 2fbef6aad8
commit bc7b0cac7b
2 changed files with 149 additions and 7 deletions
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11
include/hw/virtio/vhost-vdpa.h
View file

@ -52,6 +52,8 @@ typedef struct vhost_vdpa {
struct vhost_dev *dev;
Error *migration_blocker;
VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
QLIST_HEAD(, vdpa_iommu) iommu_list;
IOMMUNotifier n;
} VhostVDPA;
int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range);
@ -61,4 +63,13 @@ int vhost_vdpa_dma_map(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
int vhost_vdpa_dma_unmap(struct vhost_vdpa *v, uint32_t asid, hwaddr iova,
hwaddr size);
typedef struct vdpa_iommu {
struct vhost_vdpa *dev;
IOMMUMemoryRegion *iommu_mr;
hwaddr iommu_offset;
IOMMUNotifier n;
QLIST_ENTRY(vdpa_iommu) iommu_next;
} VDPAIOMMUState;
#endif