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Subject: Re: [virtio-comment] Re: [PATCH v5 1/7] Introduce device group
On 7/6/2022 2:42 PM, Michael S. Tsirkin wrote:
On Wed, Jul 06, 2022 at 02:25:52PM +0300, Max Gurtovoy wrote:maybe add here "devices of this type use the Virtio PCI transport (link)" I am not sure. Maybe we want a section about SR-IOV generally, with mentions of the feature bit and the group type. For now I think what you have is enough.Ok. So for now we won't add this.Well adding a link can't hurt.
Ok. Can you review the bellow please ? reviewed-by will be great.. diff --git a/introduction.tex b/introduction.tex index aa9ec1b..c9ca978 100644 --- a/introduction.tex +++ b/introduction.tex@@ -156,6 +156,21 @@ \subsection{Transition from earlier specification drafts}\label{sec:Transition f
Âsections tagged "Legacy Interface" in the section title. ÂThese highlight the changes made since the earlier drafts.+\subsection{Device group}\label{sec:Introduction / Terminology / Device group}
+ +A device group includes one or more virtio devices.+Each virtio device has a unique group member identifier (group_member_id) within a device group. A valid group member identifier +is a 64-bit field in the range of 0x0 - 0xFFFFFFFFFFFFFFF0. Member identifier 0xFFFFFFFFFFFFFFFF is a value that refers to all devices in a
+device group and isn't a valid group member identifier. + +For now, the supported device groups are: +\begin{enumerate}+\item SR-IOV type - this group includes a virtio PCI SR-IOV physical function (PF) and all its virtual functions (VFs). +For this group type, the PF device has group member identifier of 0. Each VF has a group member identifier matching it's VF number +(according to PCI Express Base Specification, Single Root I/O Virtualization and Sharing chapter). Devices that are members in this group use +the Virtio PCI transport (for more details see \ref{sec:Virtio Transport Options / Virtio Over PCI Bus}).
+\end{enumerate} + Â\section{Structure Specifications}\label{sec:Structure Specifications} ÂMany device and driver in-memory structure layouts are documented using
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