diff options
| author | Tiwei Bie <tiwei.bie@intel.com> | 2018-05-25 00:49:51 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-06-07 21:55:51 +0300 |
| commit | 89dd55f5e60676d4441973f4806e954ac32d4526 (patch) | |
| tree | de380dae6434868f1f3142d6225f23623d67963d | |
| parent | 12fe939f1df9482d6134f9ec5ae39ddacc3df426 (diff) | |
Allocate a feature bit for virtio devices which support SR-IOV.
Note: at proposer's request, driver requirements have been
omitted - a reworked version is now being discussed.
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Fixes: https://github.com/oasis-tcs/virtio-spec/issues/11
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
| -rw-r--r-- | content.tex | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/content.tex b/content.tex index c4b3b5c..be18234 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 36] Feature bits reserved for extensions to the queue and +\item[24 to 37] Feature bits reserved for extensions to the queue and feature negotiation mechanisms -\item[37 and above] Feature bits reserved for future extensions. +\item[38 and above] Feature bits reserved for future extensions. \end{description} \begin{note} @@ -5365,6 +5365,9 @@ Descriptors} and \ref{sec:Packed Virtqueues / Indirect Flag: Scatter-Gather Supp better performance. This feature indicates whether a stronger form of barrier suitable for hardware devices is necessary. + \item[VIRTIO_F_SR_IOV(37)] This feature indicates that + the device supports Single Root I/O Virtualization. + Currently only PCI devices support this feature. \end{description} \drivernormative{\section}{Reserved Feature Bits}{Reserved Feature Bits} @@ -5400,6 +5403,10 @@ buffers in the same order in which they have been available. A device MAY fail to operate further if VIRTIO_F_IO_BARRIER is not accepted. +A device SHOULD offer VIRTIO_F_SR_IOV if it is a PCI device +and presents a PCI SR-IOV capability structure, otherwise +it MUST NOT offer VIRTIO_F_SR_IOV. + \section{Legacy Interface: Reserved Feature Bits}\label{sec:Reserved Feature Bits / Legacy Interface: Reserved Feature Bits} Transitional devices MAY offer the following: |