From 89dd55f5e60676d4441973f4806e954ac32d4526 Mon Sep 17 00:00:00 2001
From: Tiwei Bie <tiwei.bie@intel.com>
Date: Fri, 25 May 2018 00:49:51 +0800
Subject: content: support SR-IOV

Allocate a feature bit for virtio devices which support SR-IOV.
Note: at proposer's request, driver requirements have been
omitted - a reworked version is now being discussed.

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Fixes: https://github.com/oasis-tcs/virtio-spec/issues/11
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
---
 content.tex | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'content.tex')

diff --git a/content.tex b/content.tex
index c4b3b5c..be18234 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 36] Feature bits reserved for extensions to the queue and
+\item[24 to 37] Feature bits reserved for extensions to the queue and
   feature negotiation mechanisms
 
-\item[37 and above] Feature bits reserved for future extensions.
+\item[38 and above] Feature bits reserved for future extensions.
 \end{description}
 
 \begin{note}
@@ -5365,6 +5365,9 @@ Descriptors} and \ref{sec:Packed Virtqueues / Indirect Flag: Scatter-Gather Supp
   better performance.  This feature indicates whether
   a stronger form of barrier suitable for hardware
   devices is necessary.
+  \item[VIRTIO_F_SR_IOV(37)] This feature indicates that
+  the device supports Single Root I/O Virtualization.
+  Currently only PCI devices support this feature.
 \end{description}
 
 \drivernormative{\section}{Reserved Feature Bits}{Reserved Feature Bits}
@@ -5400,6 +5403,10 @@ buffers in the same order in which they have been available.
 A device MAY fail to operate further if VIRTIO_F_IO_BARRIER
 is not accepted.
 
+A device SHOULD offer VIRTIO_F_SR_IOV if it is a PCI device
+and presents a PCI SR-IOV capability structure, otherwise
+it MUST NOT offer VIRTIO_F_SR_IOV.
+
 \section{Legacy Interface: Reserved Feature Bits}\label{sec:Reserved Feature Bits / Legacy Interface: Reserved Feature Bits}
 
 Transitional devices MAY offer the following:
-- 
cgit v1.2.3

