[Xen-changelog] [xen master] netif: document feature-split-event-channel

[patchbot@xxxxxxx]

commit 9204bc654562976c7cdebf21c6b5013f6e3057b3
Author:     Wei Liu <wei.liu2@xxxxxxxxxx>
AuthorDate: Wed May 22 16:44:45 2013 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed May 22 16:44:45 2013 +0200

    netif: document feature-split-event-channel
    
    This is a new feature to separate TX and RX notification. Document it in
    canonical header for future reference.
    
    For reference implementation, please see Xen network driver in Linux kernel.
    
    Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/include/public/io/netif.h |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/xen/include/public/io/netif.h b/xen/include/public/io/netif.h
index 9664998..d477751 100644
--- a/xen/include/public/io/netif.h
+++ b/xen/include/public/io/netif.h
@@ -57,6 +57,18 @@
  */
 
 /*
+ * "feature-split-event-channels" is introduced to separate guest TX
+ * and RX notification. Backend either doesn't support this feature or
+ * advertises it via xenstore as 0 (disabled) or 1 (enabled).
+ *
+ * To make use of this feature, frontend should allocate two event
+ * channels for TX and RX, advertise them to backend as
+ * "event-channel-tx" and "event-channel-rx" respectively. If frontend
+ * doesn't want to use this feature, it just writes "event-channel"
+ * node as before.
+ */
+
+/*
  * This is the 'wire' format for packets:
  *  Request 1: netif_tx_request -- NETTXF_* (any flags)
  * [Request 2: netif_tx_extra]  (only if request 1 has NETTXF_extra_info)
--
generated by git-patchbot for /home/xen/git/xen.git#master

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