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Subject: [PATCH 3/4] ccw: virtio revision vs. virtio feature bits
We don't want the VERSION_1 feature bit unless at least revision 1 has been negotiated. Make this a requirement. VIRTIO-119 Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> --- conformance.tex | 1 + content.tex | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/conformance.tex b/conformance.tex index 033481f..b10ce96 100644 --- a/conformance.tex +++ b/conformance.tex @@ -182,6 +182,7 @@ A Channel I/O device MUST conform to the following normative statements: \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 / Handling Device Features} \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} diff --git a/content.tex b/content.tex index 6968583..38ae49e 100644 --- a/content.tex +++ b/content.tex @@ -2656,6 +2656,14 @@ For communicating its supported features to the device, the driver uses the CCW_CMD_WRITE_FEAT command, denoting a \field{features}/\field{index} combination. +\devicenormative{\paragraph}{Handling Device Features}{Virtio Transport Options / Virtio over channel I/O / Device Initialization / Handling Device Features} + +The device MUST NOT offer VIRTIO_F_VERSION_1 if not at least revision 1 has +been negociated. + +The device MUST NOT accept VIRTIO_F_VERSION_1 if not at least revision 1 has +been negociated. + \subsubsection{Device Configuration}\label{sec:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Device Configuration} The device's configuration space is located in host memory. -- 1.7.9.5
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