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5ead97c8 JF |
1 | /****************************************************************************** |
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 | ||
14 | u8 xen_features[XENFEAT_NR_SUBMAPS * 32] __read_mostly; | |
15 | EXPORT_SYMBOL_GPL(xen_features); | |
16 | ||
17 | void 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 | } |