This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / xen / core / features.c

diff --git a/drivers/xen/core/features.c b/drivers/xen/core/features.c
new file mode 100644 (file)
index 0000000..4d50caf
--- /dev/null
+++ b/drivers/xen/core/features.c
@@ -0,0 +1,30 @@
+/******************************************************************************
+ * features.c
+ *
+ * Xen feature flags.
+ *
+ * Copyright (c) 2006, Ian Campbell, XenSource Inc.
+ */
+#include <linux/types.h>
+#include <linux/cache.h>
+#include <linux/module.h>
+#include <asm/hypervisor.h>
+#include <xen/features.h>
+
+u8 xen_features[XENFEAT_NR_SUBMAPS * 32] __read_mostly;
+/* Not a GPL symbol: used in ubiquitous macros, so too restrictive. */
+EXPORT_SYMBOL(xen_features);
+
+void setup_xen_features(void)
+{
+       xen_feature_info_t fi;
+       int i, j;
+
+       for (i = 0; i < XENFEAT_NR_SUBMAPS; i++) {
+               fi.submap_idx = i;
+               if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
+                       break;
+               for (j=0; j<32; j++)
+                       xen_features[i*32+j] = !!(fi.submap & 1<<j);
+       }
+}