[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[virtio-dev] [PATCH v2 1/5] virtio-mmio: Add feature bit for MMIO notifi

From: Jing Liu
Subject: [virtio-dev] [PATCH v2 1/5] virtio-mmio: Add feature bit for MMIO notification
Date: Tue, 21 Jan 2020 21:54:29 +0800

All the queues notifications use the same register on MMIO transport
layer. Add a feature bit (39) for enhancing the notification capability.
The detailed mechanism would be in next patch.

Co-developed-by: Chao Peng <address@hidden>
Signed-off-by: Chao Peng <address@hidden>
Co-developed-by: Liu Jiang <address@hidden>
Signed-off-by: Liu Jiang <address@hidden>
Co-developed-by: Zha Bin <address@hidden>
Signed-off-by: Zha Bin <address@hidden>
Signed-off-by: Jing Liu <address@hidden>
 content.tex | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/content.tex b/content.tex
index d68cfaf..826bc7d 100644
--- a/content.tex
+++ b/content.tex
@@ -5810,6 +5810,9 @@ \chapter{Reserved Feature Bits}\label{sec:Reserved 
Feature Bits}
   in its device notifications.
   See \ref{sec:Virtqueues / Driver notifications}~\nameref{sec:Virtqueues / 
Driver notifications}.
+  \item[VIRTIO_F_MMIO_NOTIFICATION(39)] This feature indicates
+  that the device supports enhanced notification mechanism on
+  MMIO transport layer.
 \drivernormative{\section}{Reserved Feature Bits}{Reserved Feature Bits}
@@ -5843,6 +5846,8 @@ \chapter{Reserved Feature Bits}\label{sec:Reserved 
Feature Bits}
 or partially reset, and even without re-negotiating
 VIRTIO_F_SR_IOV after the reset.
+A driver SHOULD accept VIRTIO_F_MMIO_NOTIFICATION if it is offered.
 \devicenormative{\section}{Reserved Feature Bits}{Reserved Feature Bits}
 A device MUST offer VIRTIO_F_VERSION_1.  A device MAY fail to operate further
@@ -5872,6 +5877,10 @@ \chapter{Reserved Feature Bits}\label{sec:Reserved 
Feature Bits}
 and presents a PCI SR-IOV capability structure, otherwise
+If VIRTIO_F_MMIO_NOTIFICATION has been negotiated, a device
+MUST support handling the notification from driver at the
+calculated location.
 \section{Legacy Interface: Reserved Feature Bits}\label{sec:Reserved Feature 
Bits / Legacy Interface: Reserved Feature Bits}
 Transitional devices MAY offer the following:

reply via email to

[Prev in Thread] Current Thread [Next in Thread]