| Jeremy Fitzhardinge | a42089d | 2007-07-17 18:37:04 -0700 | [diff] [blame^] | 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__ */ |