Reserve a feature bit for virtio devices which support SR-IOV.
Suggested-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Tiwei Bie <[email protected]>
---
More details can be found from this thread:
https://patchwork.kernel.org/patch/10285541/
content.tex | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/content.tex b/content.tex
index 7a92cb1..62214fa 100644
--- a/content.tex
+++ b/content.tex
@@ -95,10 +95,10 @@ Feature bits are allocated as follows:
\begin{description}
\item[0 to 23] Feature bits for the specific device type
-\item[24 to 33] Feature bits reserved for extensions to the queue and
+\item[24 to 36] Feature bits reserved for extensions to the queue and
feature negotiation mechanisms
-\item[34 and above] Feature bits reserved for future extensions.
+\item[37 and above] Feature bits reserved for future extensions.
\end{description}
\begin{note}
@@ -5348,6 +5348,8 @@ Descriptors} and \ref{sec:Packed Virtqueues / Indirect
Flag: Scatter-Gather Supp
\item[VIRTIO_F_IN_ORDER(35)] This feature indicates
that all buffers are used by the device in the same
order in which they have been made available.
+ \item[VIRTIO_F_SR_IOV(36)] This feature indicates that
+ the device supports Single Root I/O Virtualization.
\end{description}
\drivernormative{\section}{Reserved Feature Bits}{Reserved Feature Bits}
@@ -5363,6 +5365,10 @@ addresses to the device.
A driver SHOULD accept VIRTIO_F_RING_PACKED if it is offered.
+A driver SHOULD accept VIRTIO_F_SR_IOV if it is offered.
+If VIRTIO_F_SR_IOV has been negotiated, a driver can
+access device's SR-IOV capability structure.
+
\devicenormative{\section}{Reserved Feature Bits}{Reserved Feature Bits}
A device MUST offer VIRTIO_F_VERSION_1. A device MAY fail to operate further
@@ -5376,6 +5382,10 @@ accepted.
If VIRTIO_F_IN_ORDER has been negotiated, a device MUST use
buffers in the same order in which they have been available.
+A device SHOULD offer VIRTIO_F_SR_IOV if it presents a SR-IOV
+capability structure. A device MAY fail to operate further
+if VIRTIO_F_SR_IOV is not accepted.
+
\section{Legacy Interface: Reserved Feature Bits}\label{sec:Reserved Feature
Bits / Legacy Interface: Reserved Feature Bits}
Transitional devices MAY offer the following:
--
2.17.0
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