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By default virtio-IOMMU is disabled. It can be enabled per pass-through device. Sample command lines: default: virtio IOMMU disabled on pass-through device: --vfio=/sys/bus/pci/devices/0000:00:02.0 Explicitly disable virtio IOMMU: --vfio=/sys/bus/pci/devices/0000:00:02.0,iommu=off Enable virtio IOMMU on the desired pass-through device: --vfio=/sys/bus/pci/devices/0000:00:02.0,iommu=on BUG=b:181736020 TEST=passthru one device with iommu=on TEST=passthru two devices with iommu=on from different VFIO group TEST=passthru two devices with iommu=on from same VFIO group TEST=passthru one device with iommu=on and another device with iommu=off Change-Id: Id74d2210f774a90ba5e83671e76e061cb8fec758 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2757276 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Daniel Verkamp <dverkamp@chromium.org> Reviewed-by: David Stevens <stevensd@chromium.org> Commit-Queue: David Stevens <stevensd@chromium.org>
14 lines
392 B
Text
14 lines
392 B
Text
# Copyright 2021 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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@include /usr/share/policy/crosvm/common_device.policy
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prctl: arg0 == PR_SET_NAME
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open: return ENOENT
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openat: return ENOENT
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# 0x3B71: VFIO_IOMMU_MAP_DMA
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# 0x3B72: VFIO_IOMMU_UNMAP_DMA
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ioctl: arg1 == 0x3B71 || arg1 == 0x3B72
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