From 178c2c7969e33c2987813d113278beb33c48e6a3 Mon Sep 17 00:00:00 2001
From: Kip Macy <kmacy@FreeBSD.org>
Date: Fri, 15 Aug 2008 21:20:44 +0000
Subject: Import check for xen features.

MFC after:	1 month
---
 sys/xen/features.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 sys/xen/features.c

(limited to 'sys/xen')

diff --git a/sys/xen/features.c b/sys/xen/features.c
new file mode 100644
index 000000000000..51d68990e98f
--- /dev/null
+++ b/sys/xen/features.c
@@ -0,0 +1,24 @@
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <machine/xen/xen-os.h>
+#include <machine/xen/hypervisor.h>
+#include <machine/xen/features.h>
+
+uint8_t xen_features[XENFEAT_NR_SUBMAPS * 32] /* __read_mostly */;
+
+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);
+        }
+}
-- 
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