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authormstsirkin <mstsirkin@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652>2015-04-22 08:26:11 +0000
committermstsirkin <mstsirkin@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652>2015-04-22 08:26:11 +0000
commitfdc047cb06529edebed75a185b2bab7383161470 (patch)
tree8b56dc6bed5398a2ef05c7fd81c7ee483b9545f4 /conformance.tex
parenta75a70b428f33cf2b684f09a4b0dcc7985726b02 (diff)
pci: missing documentation for dealing with 64 bit config fields
pci spec says what width access to use for 32, 16 and 8 bit fields, but does not explicitly say what to do for 32 bit fields. As we have text that says driver must treat 64 bit accesses as non-atomic, this seems to imply driver should always do two 32 bit wide accesses. Let's make this an explicit requirement, and require devices to support this. VIRTIO-139 Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio/branches/v1.0@508 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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@@ -155,6 +155,7 @@ A PCI device MUST conform to the following normative statements:
\begin{itemize}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Discovery}
+\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / Virtio Structure PCI Capabilities}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Common configuration structure layout}
\item \ref{devicenormative:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Notification capability}