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iommu/virtio: Support bypass domains

Eric Auger requested to merge eauger1/centos-stream-9:virtio-iommu-bypass into main

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2083111 Upstream Status: YES Test: Booting a guest VM with virtio-iommu-pci

Add support for DMA IOMMU bypass at boot. This allows to boot a guest VM with virtio-block-pci device protected by the virtio-iommu.

Signed-off-by: Eric Auger eric.auger@redhat.com

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