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| author | Zhenzhong Duan <zhenzhong.duan@intel.com> | 2022-06-13 14:10:08 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-06-16 12:54:58 -0400 |
| commit | 90519b90539b16258d1d52b908b199f44877dc18 (patch) | |
| tree | 2b362751aa48cad7fcbbe1307b06162824f1f0ee /include/hw | |
| parent | b595d6272e9219bf70a9baf6d37f64045907f03b (diff) | |
| download | qemu-90519b90539b16258d1d52b908b199f44877dc18.zip qemu-90519b90539b16258d1d52b908b199f44877dc18.tar.gz qemu-90519b90539b16258d1d52b908b199f44877dc18.tar.bz2 | |
virtio-iommu: Add bypass mode support to assigned device
Currently assigned devices can not work in virtio-iommu bypass mode.
Guest driver fails to probe the device due to DMA failure. And the
reason is because of lacking GPA -> HPA mappings when VM is created.
Add a root container memory region to hold both bypass memory region
and iommu memory region, so the switch between them is supported
just like the implementation in virtual VT-d.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220613061010.2674054-2-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/virtio/virtio-iommu.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio-iommu.h b/include/hw/virtio/virtio-iommu.h index 84391f8..102eeef 100644 --- a/include/hw/virtio/virtio-iommu.h +++ b/include/hw/virtio/virtio-iommu.h @@ -37,6 +37,8 @@ typedef struct IOMMUDevice { int devfn; IOMMUMemoryRegion iommu_mr; AddressSpace as; + MemoryRegion root; /* The root container of the device */ + MemoryRegion bypass_mr; /* The alias of shared memory MR */ } IOMMUDevice; typedef struct IOMMUPciBus { |