OvmfPkg/XenBusDxe: Add Event Channel into XenBus protocol.

[mirror_edk2.git] / OvmfPkg / Include / Protocol / XenBus.h

diff --git a/OvmfPkg/Include/Protocol/XenBus.h b/OvmfPkg/Include/Protocol/XenBus.h
index 8d1fb52c22a908fd08812008985280a21363ce1e..4c1247bc9386d4bdfbc9a15bd21bb152dfd7a250 100644 (file)
--- a/OvmfPkg/Include/Protocol/XenBus.h
+++ b/OvmfPkg/Include/Protocol/XenBus.h
@@ -63,6 +63,7 @@ typedef enum {
 \r
 \r
 #include <IndustryStandard/Xen/grant_table.h>\r
+#include <IndustryStandard/Xen/event_channel.h>\r
 \r
 ///\r
 /// Function prototypes\r
@@ -249,6 +250,54 @@ EFI_STATUS
   IN grant_ref_t      Ref\r
   );\r
 \r
+/**\r
+  Allocate a port that can be bind from domain DomainId.\r
+\r
+  @param This       A pointer to the XENBUS_PROTOCOL.\r
+  @param DomainId   The domain ID that can bind the newly allocated port.\r
+  @param Port       A pointer to a evtchn_port_t that will contain the newly\r
+                    allocated port.\r
+\r
+  @retval UINT32    The return value from the hypercall, 0 if success.\r
+**/\r
+typedef\r
+UINT32\r
+(EFIAPI *XENBUS_EVENT_CHANNEL_ALLOCATE) (\r
+  IN  XENBUS_PROTOCOL *This,\r
+  IN  domid_t         DomainId,\r
+  OUT evtchn_port_t   *Port\r
+  );\r
+\r
+/**\r
+  Send an event to the remote end of the channel whose local endpoint is Port.\r
+\r
+  @param This       A pointer to the XENBUS_PROTOCOL.\r
+  @param Port       Local port to the the event from.\r
+\r
+  @retval UINT32    The return value from the hypercall, 0 if success.\r
+**/\r
+typedef\r
+UINT32\r
+(EFIAPI *XENBUS_EVENT_CHANNEL_NOTIFY) (\r
+  IN XENBUS_PROTOCOL  *This,\r
+  IN evtchn_port_t    Port\r
+  );\r
+\r
+/**\r
+  Close a local event channel Port.\r
+\r
+  @param This       A pointer to the XENBUS_PROTOCOL.\r
+  @param Port       The event channel to close.\r
+\r
+  @retval UINT32    The return value from the hypercall, 0 if success.\r
+**/\r
+typedef\r
+UINT32\r
+(EFIAPI *XENBUS_EVENT_CHANNEL_CLOSE) (\r
+  IN XENBUS_PROTOCOL  *This,\r
+  IN evtchn_port_t    Port\r
+  );\r
+\r
 /**\r
   Register a XenStore watch.\r
 \r
@@ -345,6 +394,10 @@ struct _XENBUS_PROTOCOL {
   XENBUS_GRANT_ACCESS           GrantAccess;\r
   XENBUS_GRANT_END_ACCESS       GrantEndAccess;\r
 \r
+  XENBUS_EVENT_CHANNEL_ALLOCATE EventChannelAllocate;\r
+  XENBUS_EVENT_CHANNEL_NOTIFY   EventChannelNotify;\r
+  XENBUS_EVENT_CHANNEL_CLOSE    EventChannelClose;\r
+\r
   XENBUS_REGISTER_WATCH         RegisterWatch;\r
   XENBUS_REGISTER_WATCH_BACKEND RegisterWatchBackend;\r
   XENBUS_UNREGISTER_WATCH       UnregisterWatch;\r