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| -rw-r--r-- | content.tex | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/content.tex b/content.tex index e054919..941daa6 100644 --- a/content.tex +++ b/content.tex @@ -1132,6 +1132,7 @@ The virtio device configuration layout includes several structures: \item Notifications \item ISR Status \item Device-specific configuration (optional) +\item PCI configuration access \end{itemize} Each structure can be mapped by a Base Address register (BAR) belonging to @@ -1578,6 +1579,12 @@ at BAR selected by \field{cap.bar} and store the first \field{cap.length} bytes The driver MUST NOT write a \field{cap.offset} which is not a multiple of \field{cap.length} (ie. all accesses MUST be aligned). +The driver MUST NOT read or write \field{pci_cfg_data} +unless \field{cap.bar}, \field{cap.length} and \field{cap.offset} +address \field{cap.length} bytes within a BAR range +specified by some other Virtio Structure PCI Capability +of type other than \field{VIRTIO_PCI_CAP_PCI_CFG}. + \subsubsection{Legacy Interfaces: A Note on PCI Device Layout}\label{sec:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Legacy Interfaces: A Note on PCI Device Layout} Transitional devices MUST present part of configuration |