blob: 0707714e40d699d16032eae63fe0119c1ef3cad0 [file] [log] [blame]
Jeremy Fitzhardinge5ead97c2007-07-17 18:37:04 -07001/******************************************************************************
2 * features.c
3 *
4 * Xen feature flags.
5 *
6 * Copyright (c) 2006, Ian Campbell, XenSource Inc.
7 */
8#include <linux/types.h>
9#include <linux/cache.h>
10#include <linux/module.h>
11#include <asm/xen/hypervisor.h>
12#include <xen/features.h>
13
14u8 xen_features[XENFEAT_NR_SUBMAPS * 32] __read_mostly;
15EXPORT_SYMBOL_GPL(xen_features);
16
17void xen_setup_features(void)
18{
19 struct xen_feature_info fi;
20 int i, j;
21
22 for (i = 0; i < XENFEAT_NR_SUBMAPS; i++) {
23 fi.submap_idx = i;
24 if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
25 break;
26 for (j = 0; j < 32; j++)
27 xen_features[i * 32 + j] = !!(fi.submap & 1<<j);
28 }
29}