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a42089dd JF |
1 | /****************************************************************************** |
2 | * features.h | |
3 | * | |
4 | * Feature flags, reported by XENVER_get_features. | |
5 | * | |
6 | * Copyright (c) 2006, Keir Fraser <keir@xensource.com> | |
7 | */ | |
8 | ||
9 | #ifndef __XEN_PUBLIC_FEATURES_H__ | |
10 | #define __XEN_PUBLIC_FEATURES_H__ | |
11 | ||
12 | /* | |
13 | * If set, the guest does not need to write-protect its pagetables, and can | |
14 | * update them via direct writes. | |
15 | */ | |
16 | #define XENFEAT_writable_page_tables 0 | |
17 | ||
18 | /* | |
19 | * If set, the guest does not need to write-protect its segment descriptor | |
20 | * tables, and can update them via direct writes. | |
21 | */ | |
22 | #define XENFEAT_writable_descriptor_tables 1 | |
23 | ||
24 | /* | |
25 | * If set, translation between the guest's 'pseudo-physical' address space | |
26 | * and the host's machine address space are handled by the hypervisor. In this | |
27 | * mode the guest does not need to perform phys-to/from-machine translations | |
28 | * when performing page table operations. | |
29 | */ | |
30 | #define XENFEAT_auto_translated_physmap 2 | |
31 | ||
32 | /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ | |
33 | #define XENFEAT_supervisor_mode_kernel 3 | |
34 | ||
35 | /* | |
36 | * If set, the guest does not need to allocate x86 PAE page directories | |
37 | * below 4GB. This flag is usually implied by auto_translated_physmap. | |
38 | */ | |
39 | #define XENFEAT_pae_pgdir_above_4gb 4 | |
40 | ||
41 | #define XENFEAT_NR_SUBMAPS 1 | |
42 | ||
43 | #endif /* __XEN_PUBLIC_FEATURES_H__ */ |