| /****************************************************************************** | |
| * features.h | |
| * | |
| * Feature flags, reported by XENVER_get_features. | |
| * | |
| * Copyright (c) 2006, Keir Fraser <keir@xensource.com> | |
| */ | |
| #ifndef __XEN_PUBLIC_FEATURES_H__ | |
| #define __XEN_PUBLIC_FEATURES_H__ | |
| /* | |
| * If set, the guest does not need to write-protect its pagetables, and can | |
| * update them via direct writes. | |
| */ | |
| #define XENFEAT_writable_page_tables 0 | |
| /* | |
| * If set, the guest does not need to write-protect its segment descriptor | |
| * tables, and can update them via direct writes. | |
| */ | |
| #define XENFEAT_writable_descriptor_tables 1 | |
| /* | |
| * If set, translation between the guest's 'pseudo-physical' address space | |
| * and the host's machine address space are handled by the hypervisor. In this | |
| * mode the guest does not need to perform phys-to/from-machine translations | |
| * when performing page table operations. | |
| */ | |
| #define XENFEAT_auto_translated_physmap 2 | |
| /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ | |
| #define XENFEAT_supervisor_mode_kernel 3 | |
| /* | |
| * If set, the guest does not need to allocate x86 PAE page directories | |
| * below 4GB. This flag is usually implied by auto_translated_physmap. | |
| */ | |
| #define XENFEAT_pae_pgdir_above_4gb 4 | |
| /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */ | |
| #define XENFEAT_mmu_pt_update_preserve_ad 5 | |
| /* x86: Does this Xen host support the HVM callback vector type? */ | |
| #define XENFEAT_hvm_callback_vector 8 | |
| /* x86: pvclock algorithm is safe to use on HVM */ | |
| #define XENFEAT_hvm_safe_pvclock 9 | |
| /* x86: pirq can be used by HVM guests */ | |
| #define XENFEAT_hvm_pirqs 10 | |
| #define XENFEAT_NR_SUBMAPS 1 | |
| #endif /* __XEN_PUBLIC_FEATURES_H__ */ |