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    SubjectPCIe PASID (Process Address Space ID) and iommu code
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    Resending, as message got bounced for html content.
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    Hi,
    PCIe has introduced PASID TLP Prefix. There are two ECNs on this.

    It seems that AMD iommu code makes use of PASID. Is there a device that
    utilizes this TLP prefix?

    PASID allocation and management within a device is not clear to me. How
    does device know which PASID to issue for which virtual address? Who makes
    the association? Must be software/OS, but how? There is no table for this
    like MSI-X table.

    Any pointer/documentation will be appreciated.

    Regards,


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