This first function is used to notify the other side that there is
something to do. The other side is another Xen domain.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.per...@citrix.com>
---
OvmfPkg/XenbusDxe/EventChannel.c | 16 ++++++++++++++++
OvmfPkg/XenbusDxe/EventChannel.h | 14 ++++++++++++++
OvmfPkg/XenbusDxe/XenbusDxe.inf | 2 ++
3 files changed, 32 insertions(+)
create mode 100644 OvmfPkg/XenbusDxe/EventChannel.c
create mode 100644 OvmfPkg/XenbusDxe/EventChannel.h
diff --git a/OvmfPkg/XenbusDxe/EventChannel.c b/OvmfPkg/XenbusDxe/EventChannel.c
new file mode 100644
index 0000000..4ab8a40
--- /dev/null
+++ b/OvmfPkg/XenbusDxe/EventChannel.c
@@ -0,0 +1,16 @@
+#include "EventChannel.h"
+#include "XenHypercall.h"
+
+VOID
+XenEventChannelNotify (
+ IN XENBUS_DEVICE *Dev,
+ IN evtchn_port_t Port
+ )
+{
+ INTN ReturnCode;
+ evtchn_send_t send;
+
+ send.port = Port;
+ ReturnCode = XenHypercallEventChannelOp (Dev, EVTCHNOP_send, &send);
+ ASSERT (ReturnCode == 0);
+}
diff --git a/OvmfPkg/XenbusDxe/EventChannel.h b/OvmfPkg/XenbusDxe/EventChannel.h
new file mode 100644
index 0000000..8a3f6d4
--- /dev/null
+++ b/OvmfPkg/XenbusDxe/EventChannel.h
@@ -0,0 +1,14 @@
+#ifndef __XENBUS_EVENT_CHANNEL_H
+#define __XENBUS_EVENT_CHANNEL_H
+
+#include "XenbusDxe.h"
+
+#include <IndustryStandard/Xen/event_channel.h>
+
+VOID
+XenEventChannelNotify (
+ IN XENBUS_DEVICE *Dev,
+ IN evtchn_port_t Port
+ );
+
+#endif
diff --git a/OvmfPkg/XenbusDxe/XenbusDxe.inf b/OvmfPkg/XenbusDxe/XenbusDxe.inf
index 093932b..d4007db 100644
--- a/OvmfPkg/XenbusDxe/XenbusDxe.inf
+++ b/OvmfPkg/XenbusDxe/XenbusDxe.inf
@@ -36,6 +36,8 @@
InterlockedCompareExchange16.h
GrantTable.c
GrantTable.h
+ EventChannel.c
+ EventChannel.h
[Sources.X64]
X64/hypercall.S
--
Anthony PERARD
------------------------------------------------------------------------------
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