From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: virtio-dev-return-4092-cohuck=redhat.com@lists.oasis-open.org Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [66.179.20.138]) by lists.oasis-open.org (Postfix) with ESMTP id 1228558191C4 for ; Fri, 18 May 2018 00:39:26 -0700 (PDT) From: Tiwei Bie Date: Fri, 18 May 2018 15:38:55 +0800 Message-Id: <20180518073855.21070-1-tiwei.bie@intel.com> Subject: [virtio-dev] [RFC] content: support SR-IOV To: mst@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, virtio-dev@lists.oasis-open.org Cc: dan.daly@intel.com, alexander.h.duyck@intel.com, mark.d.rustad@intel.com, cunming.liang@intel.com, zhihong.wang@intel.com List-ID: Reserve a feature bit for virtio devices which support SR-IOV. Suggested-by: Michael S. Tsirkin Signed-off-by: Tiwei Bie --- 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 --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org