mem_access: HVMOPs for setting mem access

* Creates HVMOPs for setting and getting memory access.  The hypercalls
  can set individual pages or the default access for new/refreshed
  pages.

* Added functions to libxc to access these hypercalls.

Signed-off-by: Joe Epstein <jepstein98@gmail.com>
Reviewed-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
Acked-by: Tim Deegan <Tim.Deegan@citrix.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/tools/libxc/xc_mem_access.c b/tools/libxc/xc_mem_access.c
new file mode 100644
index 0000000000..b9e66bbd07
--- /dev/null
+++ b/tools/libxc/xc_mem_access.c
@@ -0,0 +1,42 @@
+/******************************************************************************
+ *
+ * tools/libxc/xc_mem_access.c
+ *
+ * Interface to low-level memory access mode functionality
+ *
+ * Copyright (c) 2011 Virtuata, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "xc_private.h"
+
+
+int xc_mem_access_resume(xc_interface *xch, domid_t domain_id, unsigned long gfn)
+{
+    return xc_mem_event_control(xch, domain_id,
+                                XEN_DOMCTL_MEM_EVENT_OP_ACCESS_RESUME,
+                                XEN_DOMCTL_MEM_EVENT_OP_ACCESS, NULL, NULL,
+                                gfn);
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End: 
+ */