[OASIS Issue Tracker] (VIRTIO-139) missing documentation for dealing with 64 bit config fields

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

Michael Tsirkin created VIRTIO-139:
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             Summary: missing documentation for dealing with 64 bit config fields
                 Key: VIRTIO-139
                 URL: https://issues.oasis-open.org/browse/VIRTIO-139
             Project: OASIS Virtual I/O Device (VIRTIO) TC
          Issue Type: Bug
    Affects Versions: virtio 1.0 cs02
            Reporter: Michael Tsirkin


pci spec says what width access to use for 32, 16 and 8
bit fields, but does not explicitly say what to do for
32 bit fields. As some implementations might not be able to generate 64 bit accesses,  either allow both 32 and 64 bit
accesses, or require two 32-bit accesses.




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