[PATCH 5/5] feedback: add reference to PCI specifications

["Michael S. Tsirkin" <mst@redhat.com>]

We'll add more non-normative sections with hints for
implementing registers such as PCI class, status
and command registers.

Cc: Arun Subbarao <asubbarao@lnxw.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 content.tex      | 11 +++++++++++
 introduction.tex | 12 ++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/content.tex b/content.tex
index 365df87..85452e8 100644
--- a/content.tex
+++ b/content.tex
@@ -781,6 +781,17 @@ into virtio general and bus-specific sections.
 
 Virtio devices are commonly implemented as PCI devices.
 
+A Virtio device can be implemented as any kind of PCI device:
+a Conventional PCI device, a PCI-X device or a PCI Express
+device.  A Virtio device using Virtio Over PCI Bus MUST expose to
+guest an interface that meets the specification requirements of
+the appropriate PCI specification: \hyperref[intro:PCI]{[PCI]},
+\hyperref[intro:PCI-X]{[PCI-X]} and \hyperref[intro:PCIe]{[PCIe]}
+respectively.  To assure designs meet the latest level
+requirements, designers of Virtio Over PCI devices must refer to
+the PCI-SIG home page at \url{http://www.pcisig.com} for any
+approved changes.
+
 \subsection{PCI Device Discovery}\label{sec:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Discovery}
 
 Any PCI device with Vendor ID 0x1AF4, and Device ID 0x1000 through
diff --git a/introduction.tex b/introduction.tex
index 7c79921..fbe69f6 100644
--- a/introduction.tex
+++ b/introduction.tex
@@ -46,6 +46,18 @@ The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "S
 	\phantomsection\label{intro:rfc2119}\textbf{[RFC2119]} & S. Bradner, Key words for use in RFCs to Indicate Requirement Levels, \newline\url{http://www.ietf.org/rfc/rfc2119.txt}, March 1997\\
 	\phantomsection\label{intro:S390 PoP}\textbf{[S390 PoP]} & z/Architecture Principles of Operation, \newline IBM Publication SA22-7832\\
 	\phantomsection\label{intro:S390 Common I/O}\textbf{[S390 Common I/O]} & ESA/390 Common I/O-Device and Self-Description, \newline IBM Publication SA22-7204\\
+	\phantomsection\label{intro:PCI}\textbf{[PCI]} &
+	Conventional PCI Specifications,
+	\newline\url{http://www.pcisig.com/specifications/conventional/},
+	PCI-SIG\\
+	\phantomsection\label{intro:PCI-X}\textbf{[PCI-X]} &
+	PCI-X Specifications,
+	\newline\url{http://www.pcisig.com/specifications/pcix_20/},
+	PCI-SIG\\
+	\phantomsection\label{intro:PCI-X}\textbf{[PCIe]} &
+	PCI Express Specifications
+	\newline\url{http://www.pcisig.com/specifications/pciexpress/},
+	PCI-SIG\\
 \end{longtable}
 
 \newpage
-- 
MST