conformance.tex

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\chapter{Conformance}\label{sec:Conformance}

This chapter lists the conformance targets and clauses for each; this
also forms a useful checklist which authors are asked to consult for their
implementations!

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

Conformance targets:
\begin{description}
\item[Driver] A driver MUST conform to four 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 / MMIO 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},
\ref{sec:Conformance / Driver Conformance / Traditional Memory Balloon Driver Conformance},
\ref{sec:Conformance / Driver Conformance / SCSI Host Driver Conformance},
\ref{sec:Conformance / Driver Conformance / Input Driver Conformance},
\ref{sec:Conformance / Driver Conformance / Crypto Driver Conformance},
\ref{sec:Conformance / Driver Conformance / Socket Driver Conformance},
\ref{sec:Conformance / Driver Conformance / File System Driver Conformance},
\ref{sec:Conformance / Driver Conformance / RPMB Driver Conformance},
\ref{sec:Conformance / Driver Conformance / IOMMU Driver Conformance},
\ref{sec:Conformance / Driver Conformance / Sound Driver Conformance},
\ref{sec:Conformance / Driver Conformance / Memory Driver Conformance},
\ref{sec:Conformance / Driver Conformance / I2C Adapter Driver Conformance},
\ref{sec:Conformance / Driver Conformance / SCMI Driver Conformance},
\ref{sec:Conformance / Driver Conformance / GPIO Driver Conformance} or
\ref{sec:Conformance / Driver Conformance / PMEM Driver Conformance}.

    \item Clause \ref{sec:Conformance / Legacy Interface: Transitional Device and Transitional Driver Conformance}.
  \end{itemize}
\item[Device] A device MUST conform to four 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 / MMIO 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}, 
\ref{sec:Conformance / Device Conformance / Traditional Memory Balloon Device Conformance}, 
\ref{sec:Conformance / Device Conformance / SCSI Host Device Conformance}, 
\ref{sec:Conformance / Device Conformance / GPU Device Conformance},
\ref{sec:Conformance / Device Conformance / Input Device Conformance}, 
\ref{sec:Conformance / Device Conformance / Crypto Device Conformance}, 
\ref{sec:Conformance / Device Conformance / Socket Device Conformance}, 
\ref{sec:Conformance / Device Conformance / File System Device Conformance},
\ref{sec:Conformance / Device Conformance / RPMB Device Conformance},
\ref{sec:Conformance / Device Conformance / IOMMU Device Conformance},
\ref{sec:Conformance / Device Conformance / Sound Device Conformance},
\ref{sec:Conformance / Device Conformance / Memory Device Conformance},
\ref{sec:Conformance / Device Conformance / I2C Adapter Device Conformance},
\ref{sec:Conformance / Device Conformance / SCMI Device Conformance},
\ref{sec:Conformance / Device Conformance / GPIO Device Conformance} or
\ref{sec:Conformance / Device Conformance / PMEM Device Conformance}.

    \item Clause \ref{sec:Conformance / Legacy Interface: Transitional Device and Transitional Driver Conformance}.
  \end{itemize}
\end{description}

\conformance{\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 Reset}
\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 / Used Buffer Notification Suppression}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues / The Virtqueue Available Ring}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues / The Virtqueue Used Ring}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues / Available Buffer Notification Suppression}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues / Supplying Buffers to The Device / Updating idx}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Virtqueues / Supplying Buffers to The Device / Notifying The Device}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Packed Virtqueues}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / PAcked Virtqueues / The Virtqueue Descriptor Table}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Packed Virtqueues / Scatter-Gather Support}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Packed Virtqueues / The Virtqueue Descriptor Table / Indirect Descriptors}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Packed Virtqueues / Supplying Buffers to The Device / Updating flags}
\item \ref{drivernormative:Basic Facilities of a Virtio Device / Packed Virtqueues / Supplying Buffers to The Device / Sending Available Buffer Notifications}
\item \ref{drivernormative:General Initialization And Device Operation / Device Initialization}
\item \ref{drivernormative:General Initialization And Device Operation / Device Cleanup}
\item \ref{drivernormative:Reserved Feature Bits}
\end{itemize}

\conformance{\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 / 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}

\conformance{\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}

\conformance{\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 Initialization / Communicating Status Information}
\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}
\item \ref{drivernormative:Virtio Transport Options / Virtio over channel I/O / Device Operation / Resetting Devices}
\end{itemize}

\conformance{\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 / Processing of Incoming Packets}
\item \ref{drivernormative:Device Types / Network Device / Device Operation / Control Virtqueue / Packet Receive Filtering}
\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}
\item \ref{drivernormative:Device Types / Network Device / Device Operation / Control Virtqueue / Receive-side scaling (RSS) }
\item \ref{drivernormative:Device Types / Network Device / Device Operation / Control Virtqueue / Notifications Coalescing}
\end{itemize}

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

\conformance{\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}

\conformance{\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}

\conformance{\subsection}{Traditional Memory Balloon Driver Conformance}\label{sec:Conformance / Driver Conformance / Traditional Memory Balloon Driver Conformance}

A traditional memory balloon driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / Memory Balloon Device / Feature bits}
\item \ref{drivernormative:Device Types / Memory Balloon Device / Device Operation}
\item \ref{drivernormative:Device Types / Memory Balloon Device / Device Operation / Memory Statistics}
\item \ref{drivernormative:Device Types / Memory Balloon Device / Device Operation / Free Page Hinting}
\item \ref{drivernormative:Device Types / Memory Balloon Device / Device Operation / Page Poison}
\item \ref{drivernormative:Device Types / Memory Balloon Device / Device Operation / Free Page Reporting}
\end{itemize}

\conformance{\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}

\conformance{\subsection}{Input Driver Conformance}\label{sec:Conformance / Driver Conformance / Input Driver Conformance}

An input driver MUST conform to the following normative statements:

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

\conformance{\subsection}{Crypto Driver Conformance}\label{sec:Conformance / Driver Conformance / Crypto Driver Conformance}

A Crypto driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / Crypto Device / Device configuration layout}
\item \ref{drivernormative:Device Types / Crypto Device / Device Initialization}
\item \ref{drivernormative:Device Types / Crypto Device / Device Operation / Control Virtqueue / Session operation / Session operation: create session}
\item \ref{drivernormative:Device Types / Crypto Device / Device Operation / Control Virtqueue / Session operation / Session operation: destroy session}
\item \ref{drivernormative:Device Types / Crypto Device / Device Operation / HASH Service Operation}
\item \ref{drivernormative:Device Types / Crypto Device / Device Operation / MAC Service Operation}
\item \ref{drivernormative:Device Types / Crypto Device / Device Operation / Symmetric algorithms Operation}
\item \ref{drivernormative:Device Types / Crypto Device / Device Operation / AEAD Service Operation}
\end{itemize}

\conformance{\subsection}{Socket Driver Conformance}\label{sec:Conformance / Driver Conformance / Socket Driver Conformance}

A socket driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / Socket Device / Feature bits}
\item \ref{drivernormative:Device Types / Socket Device / Device Operation / Buffer Space Management}
\item \ref{drivernormative:Device Types / Socket Device / Device Operation / Receive and Transmit}
\item \ref{drivernormative:Device Types / Socket Device / Device Operation / Device Events}
\end{itemize}

\conformance{\subsection}{File System Driver Conformance}\label{sec:Conformance / Driver Conformance / File System Driver Conformance}

A file system driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / File System Device / Device configuration layout}
\item \ref{drivernormative:Device Types / File System Device / Device Operation / Device Operation: High Priority Queue}
\item \ref{drivernormative:Device Types / File System Device / Device Operation / Device Operation: Notification Queue}
\item \ref{drivernormative:Device Types / File System Device / Device Operation / Device Operation: DAX Window}
\end{itemize}

\conformance{\subsection}{RPMB Driver Conformance}\label{sec:Conformance / Driver Conformance / RPMB Driver Conformance}

A RPMB driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / RPMB Device / Device Operation}
\end{itemize}
\conformance{\subsection}{IOMMU Driver Conformance}\label{sec:Conformance / Driver Conformance / IOMMU Driver Conformance}

An IOMMU driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / IOMMU Device / Feature bits}
\item \ref{drivernormative:Device Types / IOMMU Device / Device configuration layout}
\item \ref{drivernormative:Device Types / IOMMU Device / Device Initialization}
\item \ref{drivernormative:Device Types / IOMMU Device / Device operations}
\item \ref{drivernormative:Device Types / IOMMU Device / Device operations / ATTACH request}
\item \ref{drivernormative:Device Types / IOMMU Device / Device operations / DETACH request}
\item \ref{drivernormative:Device Types / IOMMU Device / Device operations / MAP request}
\item \ref{drivernormative:Device Types / IOMMU Device / Device operations / UNMAP request}
\item \ref{drivernormative:Device Types / IOMMU Device / Device operations / PROBE request}
\item \ref{drivernormative:Device Types / IOMMU Device / Device operations / PROBE properties / RESVMEM}
\item \ref{drivernormative:Device Types / IOMMU Device / Device operations / Fault reporting}
\end{itemize}

\conformance{\subsection}{Sound Driver Conformance}\label{sec:Conformance / Driver Conformance / Sound Driver Conformance}

A sound driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / Sound Device / Device Initialization}
\item \ref{drivernormative:Device Types / Sound Device / Item Information Request}
\item \ref{drivernormative:Device Types / Sound Device / Device Operation / PCM Stream Parameters}
\item \ref{drivernormative:Device Types / Sound Device / Device Operation / PCM Output Stream}
\item \ref{drivernormative:Device Types / Sound Device / Device Operation / PCM Input Stream}
\item \ref{drivernormative:Device Types / Sound Device / Device Operation / Control Element Value}
\item \ref{drivernormative:Device Types / Sound Device / Device Operation / Control Element Metadata}
\end{itemize}

\conformance{\subsection}{Memory Driver Conformance}\label{sec:Conformance / Driver Conformance / Memory Driver Conformance}

A memory driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / Memory Device / Device configuration layout}
\item \ref{drivernormative:Device Types / Memory Device / Device Initialization}
\item \ref{drivernormative:Device Types / Memory Device / Device Operation}
\item \ref{drivernormative:Device Types / Memory Device / Device Operation / PLUG request}
\item \ref{drivernormative:Device Types / Memory Device / Device Operation / UNPLUG request}
\item \ref{drivernormative:Device Types / Memory Device / Device Operation / UNPLUG ALL request}
\item \ref{drivernormative:Device Types / Memory Device / Device Operation / STATE request}
\end{itemize}

\conformance{\subsection}{I2C Adapter Driver Conformance}\label{sec:Conformance / Driver Conformance / I2C Adapter Driver Conformance}

An I2C Adapter driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / I2C Adapter Device / Device Operation}
\end{itemize}

\conformance{\subsection}{SCMI Driver Conformance}\label{sec:Conformance / Driver Conformance / SCMI Driver Conformance}

An SCMI driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / SCMI Device / Device Operation / cmdq Operation}
\item \ref{drivernormative:Device Types / SCMI Device / Device Operation / Setting Up eventq Buffers}
\end{itemize}

\conformance{\subsection}{GPIO Driver Conformance}\label{sec:Conformance / Driver Conformance / GPIO Driver Conformance}

A General Purpose Input/Output (GPIO) driver MUST conform to the following
normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / GPIO Device / requestq Operation}
\item \ref{drivernormative:Device Types / GPIO Device / eventq Operation}
\end{itemize}

\conformance{\subsection}{PMEM Driver Conformance}\label{sec:Conformance / Driver Conformance / PMEM Driver Conformance}

A PMEM driver MUST conform to the following normative statements:

\begin{itemize}
\item \ref{drivernormative:Device Types / PMEM Device / Device Initialization}
\end{itemize}

\conformance{\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 Reset}
\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 / Used Buffer Notification Suppression}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Virtqueues / The Virtqueue Used Ring}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Virtqueues / Available Buffer Notification Suppression}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Packed Virtqueues}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Packed Virtqueues / The Virtqueue Descriptor Table}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Packed Virtqueues / Scatter-Gather Support}
\item \ref{devicenormative:Basic Facilities of a Virtio Device / Shared Memory Regions}
\item \ref{devicenormative:Reserved Feature Bits}
\end{itemize}

\conformance{\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 / PCI Device Layout}
\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 configuration}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Shared memory capability}
\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 / Non-transitional Device With Legacy Driver}
\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 / Used Buffer Notifications}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Notification of Device Configuration Changes}
\end{itemize}

\conformance{\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}

\conformance{\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 / Communicating Status Information}
\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}
\item \ref{devicenormative:Virtio Transport Options / Virtio over channel I/O / Device Operation / Resetting Devices}
\end{itemize}

\conformance{\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 / Packet Transmission}
\item \ref{devicenormative:Device Types / Network Device / Device Operation / Setting Up Receive Buffers}
\item \ref{devicenormative:Device Types / Network Device / Device Operation / Processing of Incoming Packets}
\item \ref{devicenormative:Device Types / Network Device / Device Operation / Control Virtqueue / Packet Receive Filtering}
\item \ref{devicenormative:Device Types / Network Device / Device Operation / Control Virtqueue / Setting MAC Address Filtering}
\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}
\item \ref{devicenormative:Device Types / Network Device / Device Operation / Control Virtqueue / Receive-side scaling (RSS) / RSS processing}
\item \ref{devicenormative:Device Types / Network Device / Device Operation / Control Virtqueue / Notifications Coalescing}
\end{itemize}

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

\conformance{\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}

\conformance{\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}

\conformance{\subsection}{Traditional Memory Balloon Device Conformance}\label{sec:Conformance / Device Conformance / Traditional Memory Balloon Device Conformance}

A traditional memory balloon device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / Memory Balloon Device / Feature bits}
\item \ref{devicenormative:Device Types / Memory Balloon Device / Device Operation}
\item \ref{devicenormative:Device Types / Memory Balloon Device / Device Operation / Memory Statistics}
\item \ref{devicenormative:Device Types / Memory Balloon Device / Device Operation / Free Page Hinting}
\item \ref{devicenormative:Device Types / Memory Balloon Device / Device Operation / Page Poison}
\item \ref{devicenormative:Device Types / Memory Balloon Device / Device Operation / Free Page Reporting}
\end{itemize}

\conformance{\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 Initialization}
\item \ref{devicenormative:Device Types / SCSI Host Device / Device Operation / Device Operation: Request Queues}
\item \ref{devicenormative:Device Types / SCSI Host Device / Device Operation / Device Operation: eventq}
\end{itemize}

\conformance{\subsection}{GPU Device Conformance}\label{sec:Conformance / Device Conformance / GPU Device Conformance}

A GPU device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / GPU Device / Device Initialization}
\item \ref{devicenormative:Device Types / GPU Device / Device Operation / Device Operation: Command lifecycle and fencing}
\end{itemize}

\conformance{\subsection}{Input Device Conformance}\label{sec:Conformance / Device Conformance / Input Device Conformance}

An input device MUST conform to the following normative statements:

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

\conformance{\subsection}{Crypto Device Conformance}\label{sec:Conformance / Device Conformance / Crypto Device Conformance}

A Crypto device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / Crypto Device / Device configuration layout}
\item \ref{devicenormative:Device Types / Crypto Device / Device Operation / Control Virtqueue / Session operation / Session operation: create session}
\item \ref{devicenormative:Device Types / Crypto Device / Device Operation / Control Virtqueue / Session operation / Session operation: destroy session}
\item \ref{devicenormative:Device Types / Crypto Device / Device Operation / HASH Service Operation}
\item \ref{devicenormative:Device Types / Crypto Device / Device Operation / MAC Service Operation}
\item \ref{devicenormative:Device Types / Crypto Device / Device Operation / Symmetric algorithms Operation}
\item \ref{devicenormative:Device Types / Crypto Device / Device Operation / AEAD Service Operation}
\end{itemize}

\conformance{\subsection}{Socket Device Conformance}\label{sec:Conformance / Device Conformance / Socket Device Conformance}

A socket device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / Socket Device / Feature bits}
\item \ref{devicenormative:Device Types / Socket Device / Device Operation / Buffer Space Management}
\item \ref{devicenormative:Device Types / Socket Device / Device Operation / Receive and Transmit}
\end{itemize}

\conformance{\subsection}{File System Device Conformance}\label{sec:Conformance / Device Conformance / File System Device Conformance}

A file system device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / File System Device / Device configuration layout}
\item \ref{devicenormative:Device Types / File System Device / Device Operation / Device Operation: High Priority Queue}
\item \ref{devicenormative:Device Types / File System Device / Device Operation / Device Operation: DAX Window}
\end{itemize}

\conformance{\subsection}{RPMB Device Conformance}\label{sec:Conformance / Device Conformance / RPMB Device Conformance}

An RPMB device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / RPMB Device / Device Initialization}
\item \ref{devicenormative:Device Types / RPMB Device / Device Operation / Device Operation: Program Key}
\item \ref{devicenormative:Device Types / RPMB Device / Device Operation / Device Operation: Get Write Counter}
\item \ref{devicenormative:Device Types / RPMB Device / Device Operation / Device Operation: Data Write}
\item \ref{devicenormative:Device Types / RPMB Device / Device Operation / Device Operation: Data Read}
\item \ref{devicenormative:Device Types / RPMB Device / Device Operation / Device Operation: Result Read}
\item \ref{devicenormative:Device Types / RPMB Device / Device Operation}
\end{itemize}

\conformance{\subsection}{IOMMU Device Conformance}\label{sec:Conformance / Device Conformance / IOMMU Device Conformance}

An IOMMU device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / IOMMU Device / Feature bits}
\item \ref{devicenormative:Device Types / IOMMU Device / Device configuration layout}
\item \ref{devicenormative:Device Types / IOMMU Device / Device operations}
\item \ref{devicenormative:Device Types / IOMMU Device / Device operations / ATTACH request}
\item \ref{devicenormative:Device Types / IOMMU Device / Device operations / DETACH request}
\item \ref{devicenormative:Device Types / IOMMU Device / Device operations / MAP request}
\item \ref{devicenormative:Device Types / IOMMU Device / Device operations / UNMAP request}
\item \ref{devicenormative:Device Types / IOMMU Device / Device operations / PROBE request}
\item \ref{devicenormative:Device Types / IOMMU Device / Device operations / PROBE properties / RESVMEM}
\item \ref{devicenormative:Device Types / IOMMU Device / Device operations / Fault reporting}
\end{itemize}

\conformance{\subsection}{Sound Device Conformance}\label{sec:Conformance / Device Conformance / Sound Device Conformance}

A sound device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / Jack Information}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / PCM Stream Information}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / PCM Stream Parameters}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / PCM Stream Release}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / PCM Output Stream}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / PCM Input Stream}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / Channel Map Information}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / Control Element Information}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / Control Element Metadata}
\item \ref{devicenormative:Device Types / Sound Device / Device Operation / Control Element Notifications}
\end{itemize}

\conformance{\subsection}{Memory Device Conformance}\label{sec:Conformance / Device Conformance / Memory Device Conformance}

A memory device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / Memory Device / Device configuration layout}
\item \ref{devicenormative:Device Types / Memory Device / Device Initialization}
\item \ref{devicenormative:Device Types / Memory Device / Device Operation}
\item \ref{devicenormative:Device Types / Memory Device / Device Operation / PLUG request}
\item \ref{devicenormative:Device Types / Memory Device / Device Operation / UNPLUG request}
\item \ref{devicenormative:Device Types / Memory Device / Device Operation / UNPLUG ALL request}
\item \ref{devicenormative:Device Types / Memory Device / Device Operation / STATE request}
\end{itemize}

\conformance{\subsection}{I2C Adapter Device Conformance}\label{sec:Conformance / Device Conformance / I2C Adapter Device Conformance}

An I2C Adapter device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / I2C Adapter Device / Device Operation}
\end{itemize}

\conformance{\subsection}{SCMI Device Conformance}\label{sec:Conformance / Device Conformance / SCMI Device Conformance}

An SCMI device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / SCMI Device / Feature bits}
\item \ref{devicenormative:Device Types / SCMI Device / Device Operation / cmdq Operation}
\item \ref{devicenormative:Device Types / SCMI Device / Device Operation / eventq Operation}
\item \ref{devicenormative:Device Types / SCMI Device / Device Operation / Shared Memory Operation}
\end{itemize}

\conformance{\subsection}{GPIO Device Conformance}\label{sec:Conformance / Device Conformance / GPIO Device Conformance}

A General Purpose Input/Output (GPIO) device MUST conform to the following
normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / GPIO Device / requestq Operation}
\item \ref{devicenormative:Device Types / GPIO Device / eventq Operation}
\end{itemize}

\conformance{\subsection}{PMEM Device Conformance}\label{sec:Conformance / Device Conformance / PMEM Device Conformance}

A PMEM device MUST conform to the following normative statements:

\begin{itemize}
\item \ref{devicenormative:Device Types / PMEM Device / Device Initialization}
\item \ref{devicenormative:Device Types / PMEM Device / Device Operation / Virtqueue flush}
\item \ref{devicenormative:Device Types / PMEM Device / Device Operation / Virtqueue return}
\end{itemize}

\conformance{\section}{Legacy Interface: Transitional Device and Transitional Driver Conformance}\label{sec:Conformance / Legacy Interface: Transitional Device and Transitional Driver Conformance}
A conformant implementation MUST be either transitional or
non-transitional, see \ref{intro:Legacy
Interface: Terminology}.

An implementation MAY choose to implement OPTIONAL support for the
legacy interface, including support for legacy drivers
or devices, by conforming to all of the MUST or
REQUIRED level requirements for the legacy interface
for the transitional devices and drivers.

The requirements for the legacy interface for transitional implementations
are located in sections named ``Legacy Interface'' listed below:
\begin{itemize}
\item Section \ref{sec:Basic Facilities of a Virtio Device /
Feature Bits / Legacy Interface: A Note on Feature Bits}
\item Section \ref{sec:Basic Facilities of a Virtio Device / Device Configuration Space / Legacy Interface: A Note on Configuration Space endian-ness}
\item Section \ref{sec:Basic Facilities of a Virtio Device / Device Configuration Space / Legacy Interface: Device Configuration Space}
\item Section \ref{sec:Basic Facilities of a Virtio Device / Virtqueues / Legacy Interfaces: A Note on Virtqueue Layout}
\item Section \ref{sec:Basic Facilities of a Virtio Device / Virtqueues / Legacy Interfaces: A Note on Virtqueue Endianness}
\item Section \ref{sec:Basic Facilities of a Virtio Device / Virtqueues / Message Framing / Legacy Interface: Message Framing}
\item Section \ref{sec:General Initialization And Device Operation / Device Initialization / Legacy Interface: Device Initialization}
\item Section \ref{sec:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Discovery / Legacy Interfaces: A Note on PCI Device Discovery}
\item Section \ref{sec:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Legacy Interfaces: A Note on PCI Device Layout}
\item Section \ref{sec:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Device Initialization / Virtio Device Configuration Layout Detection / Legacy Interface: A Note on Device Layout Detection}
\item Section \ref{sec:Virtio Transport Options / Virtio Over PCI Bus / PCI-specific Initialization And Device Operation / Device Initialization / Virtqueue Configuration / Legacy Interface: A Note on Virtqueue Configuration}
\item Section \ref{sec:Virtio Transport Options / Virtio Over MMIO / Legacy interface}
\item Section \ref{sec:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Setting the Virtio Revision / Legacy Interfaces: A Note on Setting the Virtio Revision}
\item Section \ref{sec:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Configuring a Virtqueue / Legacy Interface: A Note on Configuring a Virtqueue}
\item Section \ref{sec:Virtio Transport Options / Virtio over channel I/O / Device Operation / Host->Guest Notification / Legacy Interfaces: A Note on Host->Guest Notification}
\item Section \ref{sec:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Setting Up Indicators / Legacy Interfaces: A Note on Setting Up Indicators}
\item Section \ref{sec:Device Types / Network Device / Feature bits / Legacy Interface: Feature bits}
\item Section \ref{sec:Device Types / Network Device / Device configuration layout / Legacy Interface: Device configuration layout}
\item Section \ref{sec:Device Types / Network Device / Device Operation / Legacy Interface: Device Operation}
\item Section \ref{sec:Device Types / Network Device / Device Operation / Control Virtqueue / Setting MAC Address Filtering / Legacy Interface: Setting MAC Address Filtering}
\item Section \ref{sec:Device Types / Network Device / Device Operation / Control Virtqueue / VLAN Filtering / Legacy Interface: VLAN Filtering}
\item Section \ref{sec:Device Types / Network Device / Device Operation / Control Virtqueue / Automatic receive steering in multiqueue mode / Legacy Interface: Automatic receive steering in multiqueue mode}
\item Section \ref{sec:Device Types / Network Device / Device Operation / Control Virtqueue / Offloads State Configuration / Setting Offloads State / Legacy Interface: Setting Offloads State}
\item Section \ref{sec:Device Types / Block Device / Feature bits / Legacy Interface: Feature bits}
\item Section \ref{sec:Device Types / Block Device / Device configuration layout / Legacy Interface: Device configuration layout}
\item Section \ref{sec:Device Types / Block Device / Device Initialization / Legacy Interface: Device Initialization}
\item Section \ref{sec:Device Types / Block Device / Device Operation / Legacy Interface: Device Operation}
\item Section \ref{sec:Device Types / Console Device / Device configuration layout / Legacy Interface: Device configuration layout}
\item Section \ref{sec:Device Types / Console Device / Device Operation / Legacy Interface: Device Operation}
\item Section \ref{sec:Device Types / Memory Balloon Device / Feature bits / Legacy Interface: Feature bits}
\item Section \ref{sec:Device Types / Memory Balloon Device / Device Operation / Legacy Interface: Device Operation}
\item Section \ref{sec:Device Types / Memory Balloon Device / Device Operation / Memory Statistics / Legacy Interface: Memory Statistics}
\item Section \ref{sec:Device Types / SCSI Host Device / Device configuration layout / Legacy Interface: Device configuration layout}
\item Section \ref{sec:Device Types / SCSI Host Device / Device Operation / Legacy Interface: Device Operation}
\item Section \ref{sec:Device Types / SCSI Host Device / Device Operation / Device Operation: Request Queues / Legacy Interface: Device Operation: Request Queues}
\item Section \ref{sec:Device Types / SCSI Host Device / Device Operation / Device Operation: controlq / Legacy Interface: Device Operation: controlq}
\item Section \ref{sec:Device Types / SCSI Host Device / Device Operation / Device Operation: eventq / Legacy Interface: Device Operation: eventq}
\item Section \ref{sec:Reserved Feature Bits / Legacy Interface: Reserved Feature Bits}
\end{itemize}