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| -rw-r--r-- | content.tex | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/content.tex b/content.tex index fafa532..d481359 100644 --- a/content.tex +++ b/content.tex @@ -746,6 +746,23 @@ The fields are interpreted as follows: \end{note} \end{description} +A variant of this type, struct virtio_pci_cap64, is defined for +those capaibilites that require offsets or lengths larger than +4GiB: + +\begin{lstlisting} +struct virtio_pci_cap64 { + struct virtio_pci_cap cap; + u32 offset_hi; + u32 length_hi; +}; +\end{lstlisting} + +Given that the \field{cap.length} and \field{cap.offset} fields +are only 32 bit, the additional \field{offset_hi} and \field {length_hi} +fields provide the most significant 32 bits of a total 64 bit offset and +length within the bar specified by \field{cap.bar}. + \drivernormative{\subsubsection}{Virtio Structure PCI Capabilities}{Virtio Transport Options / Virtio Over PCI Bus / Virtio Structure PCI Capabilities} The driver MUST ignore any vendor-specific capability structure which has |