[Xen-devel] [RFC PATCH 6/6] xc_version: add vm_event interface version

[Petre Pircalabu <ppircalabu@xxxxxxxxxxxxxxx>]

Signed-off-by: Petre Pircalabu <ppircalabu@xxxxxxxxxxxxxxx>
---
 tools/libxc/xc_private.c     | 3 +++
 xen/common/kernel.c          | 3 +++
 xen/include/public/version.h | 3 +++
 3 files changed, 9 insertions(+)

diff --git a/tools/libxc/xc_private.c b/tools/libxc/xc_private.c
index 90974d5..9b983e0 100644
--- a/tools/libxc/xc_private.c
+++ b/tools/libxc/xc_private.c
@@ -497,6 +497,9 @@ int xc_version(xc_interface *xch, int cmd, void *arg)
             HYPERCALL_BOUNCE_SET_DIR(arg, XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
             break;
         }
+    case XENVER_vm_event_version:
+        sz = 0;
+        break;
     default:
         ERROR("xc_version: unknown command %d\n", cmd);
         return -EINVAL;
diff --git a/xen/common/kernel.c b/xen/common/kernel.c
index 5766a0f..667552c 100644
--- a/xen/common/kernel.c
+++ b/xen/common/kernel.c
@@ -516,6 +516,9 @@ DO(xen_version)(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
 
         return sz;
     }
+
+    case XENVER_vm_event_version:
+        return VM_EVENT_INTERFACE_VERSION;
     }
 
     return -ENOSYS;
diff --git a/xen/include/public/version.h b/xen/include/public/version.h
index 7063e8c..b962386 100644
--- a/xen/include/public/version.h
+++ b/xen/include/public/version.h
@@ -103,6 +103,9 @@ struct xen_build_id {
 };
 typedef struct xen_build_id xen_build_id_t;
 
+/* arg == NULL; returns the vm_event interface version */
+#define XENVER_vm_event_version 11
+
 #endif /* __XEN_PUBLIC_VERSION_H__ */
 
 /*
-- 
2.7.4


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