From af711cda4f94b5fddcdc5eb4134387ae026e3171 Mon Sep 17 00:00:00 2001
From: Isaku Yamahata <yamahata@valinux.co.jp>
Date: Wed, 2 Apr 2008 10:53:54 -0700
Subject: xen: move features.c from arch/x86/xen/features.c to drivers/xen

ia64/xen also uses it too. Move it into common place so that
ia64/xen can share the code.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 drivers/xen/Makefile   |  2 +-
 drivers/xen/features.c | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 drivers/xen/features.c

(limited to 'drivers')

diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
index 56592f0d6cef..609fdda90a34 100644
--- a/drivers/xen/Makefile
+++ b/drivers/xen/Makefile
@@ -1,2 +1,2 @@
-obj-y	+= grant-table.o
+obj-y	+= grant-table.o features.o
 obj-y	+= xenbus/
diff --git a/drivers/xen/features.c b/drivers/xen/features.c
new file mode 100644
index 000000000000..0707714e40d6
--- /dev/null
+++ b/drivers/xen/features.c
@@ -0,0 +1,29 @@
+/******************************************************************************
+ * 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/hypervisor.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);
+	}
+}
-- 
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