MMIO: allow full 64 bit ring addresses

XMLWordPrintable

    • Type: Improvement
    • Resolution: Unresolved
    • Priority: Major
    • None
    • Affects Version/s: None
    • None
    • Hide

      make it possible to program 64 bit address
      as that is unlikely to be atomic, add an explicit
      queue enable/disable.

      Show
      make it possible to program 64 bit address as that is unlikely to be atomic, add an explicit queue enable/disable.
    • Hide

      For the MMIO part duplicate of VIRTIO-41

      Show
      For the MMIO part duplicate of VIRTIO-41

      we are using a 32 bit queuepfn so addresses can't be anywhere
      in 64 bit address space.

      [Re-titling: This already resolved in the draft for PCI. CCW doesn't use pfns at all, and uses a 64 bit address. MMIO uses a QueuePFN and a GuestPageSize, meaning it can go to larger addresses by sacrificing alignment.]

            Assignee:
            Pawel Moll (Inactive)
            Reporter:
            Michael Tsirkin
            Votes:
            0 Vote for this issue
            Watchers:
            0 Start watching this issue

              Created:
              Updated: