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Subject: Re: [virtio] [PATCH] conformance: clarify transitional/non-transitional
On Mon, 11 Mar 2019 09:20:49 -0400 "Michael S. Tsirkin" <mst@redhat.com> wrote: > Clarify that: > - non-transitional just satisfy 3 main clauses > - transitional also has a legacy interface: > however note that it's not an optional component > *for transitional devices* so MAY is inappropriate > - legacy device descriptions are non-normative. > In fact virtio 0.9 is non-normative as a whole > and always was by design: it was early days and > spec evolved to document bugs in implementations. > > VIRTIO-167 > > Signed-off-by: Michael S. Tsirkin <mst@redhat.com> > --- > conformance.tex | 26 ++++++++++++++++++-------- > 1 file changed, 18 insertions(+), 8 deletions(-) > > diff --git a/conformance.tex b/conformance.tex > index 1577c0c..518b9c7 100644 > --- a/conformance.tex > +++ b/conformance.tex > @@ -344,16 +344,26 @@ Interface: Terminology}. > > A non-transitional implementation conforms to this specification > if it satisfies all of the MUST or REQUIRED level requirements > -defined above. > +defined in section \ref{sec:Conformance / Conformance Targets} above. > > -An implementation MAY choose to implement OPTIONAL support for the > -legacy interface, including support for legacy drivers > -or devices, by additionally conforming to all of the MUST or > -REQUIRED level requirements for the legacy interface > -for the transitional devices and drivers. > +A transitional implementation conforms to this specification > +if it satisfies all of the MUST or REQUIRED level requirements > +defined in section \ref{sec:Conformance / Conformance Targets} above > +and additionally implements the legacy interface > +for the transitional devices and drivers, described in This "for the transitional devices and drivers" is a bit confusing here, I think. s/for the transitional/for/ ? > +\hyperref[intro:Virtio PCI Draft]{[Virtio PCI Draft]}. > > -The requirements for the legacy interface for transitional implementations > -are located in sections named ``Legacy Interface'' listed below: > +\begin{note} > +No normative specification for the legacy interface exists, > +instead device and driver's ability to interoperate with "instead the ability of the device or the driver to inter-operate with" ? > +the existing body of installed devices and drivers is a quality s/installed// ? > +of implementation issue. > +\begin{note} This needs to be \end{note} > + > +To facilitate creating transitional implementations, as well as > +assist in converting legacy interfaces to conforming ones, s/assist/to assist/ ? > +the requirements for the legacy interface for transitional implementations > +are located in non-normative sections named ``Legacy Interface'' listed below: > \begin{itemize} > \item Section \ref{sec:Basic Facilities of a Virtio Device / > Feature Bits / Legacy Interface: A Note on Feature Bits}
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