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\chapter{Conformance}

This chapter lists the conformance targets and clauses for each; this
also forms a useful checklist which authors should check for their
implementations!

\section{Conformance Targets}\label{sec:Conformance / Conformance Targets}

Conformance targets:
\begin{description}
\item[Driver] A driver MUST conform to three conformance clauses:
  \begin{itemize}
    \item Clause \ref{sec:Conformance / Driver Conformance},
    \item One of clauses \ref{sec:Conformance / Driver Conformance / PCI Driver Conformance}, \ref{sec:Conformance / Driver Conformance / Channel I/O Driver Conformance} or \ref{sec:Conformance / Driver Conformance / Channel I/O Driver Conformance}.
    \item One of clauses \ref{sec:Conformance / Driver Conformance / Network Driver Conformance}, \ref{sec:Conformance / Driver Conformance / Block Driver Conformance}, \ref{sec:Conformance / Driver Conformance / Console Driver Conformance}, \ref{sec:Conformance / Driver Conformance / Entropy Driver Conformance} or \ref{sec:Conformance / Driver Conformance / SCSI Host Driver Conformance}.
  \end{itemize}
\item[Device] A device MUST conform to three conformance clauses:
  \begin{itemize}
    \item Clause \ref{sec:Conformance / Device Conformance},
    \item One of clauses \ref{sec:Conformance / Device Conformance / PCI Device Conformance}, \ref{sec:Conformance / Device Conformance / Channel I/O Device Conformance} or \ref{sec:Conformance / Device Conformance / Channel I/O Device Conformance}.
    \item One of clauses \ref{sec:Conformance / Device Conformance / Network Device Conformance}, \ref{sec:Conformance / Device Conformance / Block Device Conformance}, \ref{sec:Conformance / Device Conformance / Console Device Conformance}, \ref{sec:Conformance / Device Conformance / Entropy Device Conformance} or \ref{sec:Conformance / Device Conformance / SCSI Host Device Conformance}.
  \end{itemize}
\end{description}

\section{Driver Conformance}\label{sec:Conformance / Driver Conformance}

A driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Device Status Field}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Feature Bits}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Device Configuration Space}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Message Framing}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues / The Virtqueue Descriptor Table}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues / The Virtqueue Descriptor Table / Indirect Descriptors}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues / Virtqueue Interrupt Suppression}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues / Virtqueue Notification Suppression}
\item \ref{drivernormative:General Initialization And Device Operation / Device Initialization}
\item \ref{drivernormative:General Initialization And Device Operation / Device Operation / Supplying Buffers to The Device / Updating idx}
\item \ref{drivernormative:General Initialization And Device Operation / Device Operation / Supplying Buffers to The Device / Notifying The Device}
\item \ref{drivernormative:General Initialization And Device Operation / Device Cleanup}
\item \ref{drivernormative:Reserved Feature Bits}
\end{itemize}

\subsection{PCI Driver Conformance}\label{sec:Conformance / Driver Conformance / PCI Driver Conformance}

A PCI driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Discovery}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over PCI Bus / Virtio Structure PCI Capabilities}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Common configuration structure layout}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / ISR status capability}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / PCI configuration access capability}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Device Initialization / Non-transitional Device With Legacy Driver}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Device Initialization / MSI-X Vector Configuration}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Notification of Device Configuration Changes}
\end{itemize}

\subsection{MMIO Driver Conformance}\label{sec:Conformance / Driver Conformance / MMIO Driver Conformance}

An MMIO driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over MMIO / MMIO Device Register Layout}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over MMIO / MMIO-specific Initialization And Device Operation / Device Initialization}
\item \ref{drivernormative:Virtio Transport Options / Virtio Over MMIO / MMIO-specific Initialization And Device Operation / Notifications From The Device}
\end{itemize}

\subsection{Channel I/O Driver Conformance}\label{sec:Conformance / Driver Conformance / Channel I/O Driver Conformance}

A Channel I/O driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Virtio Transport Options / Virtio over channel I/O / Basic Concepts}
\item \ref{drivernormative:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Setting the Virtio Revision}
\item \ref{drivernormative:Virtio Transport Options / Virtio over channel I/O / Device Operation / Host->Guest Notification / Notification via Adapter I/O Interrupts}
\item \ref{drivernormative:Virtio Transport Options / Virtio over channel I/O / Device Operation / Guest->Host Notification}
\end{itemize}

\subsection{Network Driver Conformance}\label{sec:Conformance / Driver Conformance / Network Driver Conformance}

A network driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / Network Device / Device configuration layout}
\item \ref{drivernormative:Device Types / Network Device / Device Operation / Packet Transmission}
\item \ref{drivernormative:Device Types / Network Device / Device Operation / Setting Up Receive Buffers}
\item \ref{drivernormative:Device Types / Network Device / Device Operation / Control Virtqueue / Setting MAC Address Filtering}
\item \ref{drivernormative:Device Types / Network Device / Device Operation / Control Virtqueue / Gratuitous Packet Sending}
\item \ref{drivernormative:Device Types / Network Device / Device Operation / Control Virtqueue / Automatic receive steering in multiqueue mode}
\item \ref{drivernormative:Device Types / Network Device / Device Operation / Control Virtqueue / Offloads State Configuration / Setting Offloads State}
\end{itemize}

\subsection{Block Driver Conformance}\label{sec:Conformance / Driver Conformance / Block Driver Conformance}

A block driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / Block Device / Device Operation}
\end{itemize}

\subsection{Console Driver Conformance}\label{sec:Conformance / Driver Conformance / Console Driver Conformance}

A console driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / Console Device / Device Operation}
\item \ref{drivernormative:Device Types / Console Device / Device Operation / Multiport Device Operation}
\end{itemize}

\subsection{Entropy Driver Conformance}\label{sec:Conformance / Driver Conformance / Entropy Driver Conformance}

An entropy driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / Entropy Device / Device Operation}
\end{itemize}

\subsection{SCSI Host Driver Conformance}\label{sec:Conformance / Driver Conformance / SCSI Host Driver Conformance}

An SCSI host driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / SCSI Host Device / Device configuration layout}
\item \ref{drivernormative:Device Types / SCSI Host Device / Device Operation / Device Operation: Request Queues}
\item \ref{drivernormative:Device Types / SCSI Host Device / Device Operation / Device Operation: eventq}
\end{itemize}

\section{Device Conformance}\label{sec:Conformance / Device Conformance}

A device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Device Status Field}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Feature Bits}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Device Configuration Space}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Message Framing}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Virtqueues / The Virtqueue Descriptor Table}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Virtqueues / The Virtqueue Descriptor Table / Indirect Descriptors}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Virtqueues / Virtqueue Interrupt Suppression}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Virtqueues / Virtqueue Notification Suppression}
\item \ref{devicenormative:Reserved Feature Bits}
\end{itemize}

\subsection{PCI Device Conformance}\label{sec:Conformance / Device Conformance / PCI Device Conformance}

A PCI device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Discovery}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / Virtio Structure PCI Capabilities}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Common configuration structure layout}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Notification capability}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / ISR status capability}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Device specific structure}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / PCI configuration access capability}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Device Initialization / MSI-X Vector Configuration}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Virtqueue Interrupts From The Device}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Notification of Device Configuration Changes}
\end{itemize}

\subsection{MMIO Device Conformance}\label{sec:Conformance / Device Conformance / MMIO Device Conformance}

An MMIO device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over MMIO / MMIO Device Register Layout}
\end{itemize}

\subsection{Channel I/O Device Conformance}\label{sec:Conformance / Device Conformance / Channel I/O Device Conformance}

A Channel I/O device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Virtio Transport Options / Virtio over channel I/O / Basic Concepts}
\item \ref{devicenormative:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Setting the Virtio Revision}
\item \ref{devicenormative:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Configuring a Virtqueue}
\item \ref{devicenormative:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Setting Up Indicators / Setting Up Two-Stage Queue Indicators}
\item \ref{devicenormative:Virtio Transport Options / Virtio over channel I/O / Device Operation / Host->Guest Notification / Notification via Adapter I/O Interrupts}
\item \ref{devicenormative:Virtio Transport Options / Virtio over channel I/O / Device Operation / Guest->Host Notification}
\end{itemize}

\subsection{Network Device Conformance}\label{sec:Conformance / Device Conformance / Network Device Conformance}

A network device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / Network Device / Device configuration layout}
\item \ref{devicenormative:Device Types / Network Device / Device Operation / Control Virtqueue / Gratuitous Packet Sending}
\item \ref{devicenormative:Device Types / Network Device / Device Operation / Control Virtqueue / Automatic receive steering in multiqueue mode}
\end{itemize}

\subsection{Block Device Conformance}\label{sec:Conformance / Device Conformance / Block Device Conformance}

A block device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / Block Device / Device Operation}
\end{itemize}

\subsection{Console Device Conformance}\label{sec:Conformance / Device Conformance / Console Device Conformance}

A console device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / Console Device / Device Initialization}
\item \ref{devicenormative:Device Types / Console Device / Device Operation / Multiport Device Operation}
\end{itemize}

\subsection{Entropy Device Conformance}\label{sec:Conformance / Device Conformance / Entropy Device Conformance}

An entropy device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / Entropy Device / Device Operation}
\end{itemize}

\subsection{SCSI Host Device Conformance}\label{sec:Conformance / Device Conformance / SCSI Host Device Conformance}

An SCSI host device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / SCSI Host Device / Device configuration layout}
\item \ref{devicenormative:Device Types / SCSI Host Device / Device Operation / Device Operation: eventq}
\end{itemize}