This commit specifies the actions to be taken by the device upon
SUSPEND.
Signed-off-by: Jason Wang <[email protected]>
Signed-off-by: Eugenio PÃrez <[email protected]>
Signed-off-by: Zhu Lingshan <[email protected]>
---
content.tex | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/content.tex b/content.tex
index 074f43e..43bd5de 100644
--- a/content.tex
+++ b/content.tex
@@ -96,6 +96,15 @@ \section{\field{Device Status} Field}\label{sec:Basic
Facilities of a Virtio Dev
If VIRTIO_F_SUSPEND is negotiated and SUSPEND is set, the device MUST clear
SUSPEND
and resumes operation upon DRIVER_OK.
+If VIRTIO_F_SUSPEND is negotiated, when SUSPEND is set, the device MUST
perform the following operations:
+\begin{itemize}
+\item Stop comsuming any descriptors
+\item Mark all finished descriptors as used and send used buffer notification
to the driver
+\item Record Virtqueue State of each enabled virtqueue, see section
\ref{sec:Virtqueues / Virtqueue State}
+\item Pause its operation and preserve all configurations in its Device
Configuration Space, see \ref{sec:Basic Facilities of a Virtio Device / Device
Configuration Space}
+\item Present SUSPEND in \field{device status}
+\end{itemize}
+
\section{Feature Bits}\label{sec:Basic Facilities of a Virtio Device / Feature
Bits}
Each virtio device offers all the features it understands. During
--
2.35.3
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