Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / xen / features.c

diff --git a/kernel/drivers/xen/features.c b/kernel/drivers/xen/features.c
new file mode 100644 (file)
index 0000000..99eda16
--- /dev/null
+++ b/kernel/drivers/xen/features.c
@@ -0,0 +1,33 @@
+/******************************************************************************
+ * 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/xen/hypercall.h>
+
+#include <xen/interface/xen.h>
+#include <xen/interface/version.h>
+#include <xen/features.h>
+
+u8 xen_features[XENFEAT_NR_SUBMAPS * 32] __read_mostly;
+EXPORT_SYMBOL_GPL(xen_features);
+
+void xen_setup_features(void)
+{
+       struct xen_feature_info 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);
+       }
+}