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  1. RHEL
  2. RHEL-64982

Support IOMMU for virt-fs device

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      Currently the virt-fs device does not support VIRTIO_F_ACCESS_PLATFORM feature (i.e. IOMMU/DMAR compatibility)

      Goal

      • Add support for the feature to the virt-fs device

      Motivation:

      • Currently Windows driver for virtio-fs device declares that the device/driver is not compatible with DMAR (DMA address translation)
      • This feature is automatically supported by all the non-virtio PCI devices and by all the virtio devices except of virtio-fs
      • This feature is mandatory for Windows Server 2025, as all certification should be done when the system is with DeviceGuard enabled. DeviceGuard is enabled when the devices support DMAR. Currently this requirement is not enforced, but might be enforced in the future versions of test kits or OSes.

      For more information, see:

      Windows Kernel DMA protection

      Kernel DMA protection 

      Windows Device Guard

        1. iommu-concept.html
          8 kB

              hreitz@redhat.com Hanna Czenczek
              ybendito@redhat.com Yuri Benditovich
              virt-maint virt-maint
              Tingting Mao Tingting Mao
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                Created:
                Updated: