1a42089ddSJeremy Fitzhardinge /****************************************************************************** 2a42089ddSJeremy Fitzhardinge * features.h 3a42089ddSJeremy Fitzhardinge * 4a42089ddSJeremy Fitzhardinge * Feature flags, reported by XENVER_get_features. 5a42089ddSJeremy Fitzhardinge * 6a42089ddSJeremy Fitzhardinge * Copyright (c) 2006, Keir Fraser <keir@xensource.com> 7a42089ddSJeremy Fitzhardinge */ 8a42089ddSJeremy Fitzhardinge 9a42089ddSJeremy Fitzhardinge #ifndef __XEN_PUBLIC_FEATURES_H__ 10a42089ddSJeremy Fitzhardinge #define __XEN_PUBLIC_FEATURES_H__ 11a42089ddSJeremy Fitzhardinge 12a42089ddSJeremy Fitzhardinge /* 13a42089ddSJeremy Fitzhardinge * If set, the guest does not need to write-protect its pagetables, and can 14a42089ddSJeremy Fitzhardinge * update them via direct writes. 15a42089ddSJeremy Fitzhardinge */ 16a42089ddSJeremy Fitzhardinge #define XENFEAT_writable_page_tables 0 17a42089ddSJeremy Fitzhardinge 18a42089ddSJeremy Fitzhardinge /* 19a42089ddSJeremy Fitzhardinge * If set, the guest does not need to write-protect its segment descriptor 20a42089ddSJeremy Fitzhardinge * tables, and can update them via direct writes. 21a42089ddSJeremy Fitzhardinge */ 22a42089ddSJeremy Fitzhardinge #define XENFEAT_writable_descriptor_tables 1 23a42089ddSJeremy Fitzhardinge 24a42089ddSJeremy Fitzhardinge /* 25a42089ddSJeremy Fitzhardinge * If set, translation between the guest's 'pseudo-physical' address space 26a42089ddSJeremy Fitzhardinge * and the host's machine address space are handled by the hypervisor. In this 27a42089ddSJeremy Fitzhardinge * mode the guest does not need to perform phys-to/from-machine translations 28a42089ddSJeremy Fitzhardinge * when performing page table operations. 29a42089ddSJeremy Fitzhardinge */ 30a42089ddSJeremy Fitzhardinge #define XENFEAT_auto_translated_physmap 2 31a42089ddSJeremy Fitzhardinge 32a42089ddSJeremy Fitzhardinge /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ 33a42089ddSJeremy Fitzhardinge #define XENFEAT_supervisor_mode_kernel 3 34a42089ddSJeremy Fitzhardinge 35a42089ddSJeremy Fitzhardinge /* 36a42089ddSJeremy Fitzhardinge * If set, the guest does not need to allocate x86 PAE page directories 37a42089ddSJeremy Fitzhardinge * below 4GB. This flag is usually implied by auto_translated_physmap. 38a42089ddSJeremy Fitzhardinge */ 39a42089ddSJeremy Fitzhardinge #define XENFEAT_pae_pgdir_above_4gb 4 40a42089ddSJeremy Fitzhardinge 41e57778a1SJeremy Fitzhardinge /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */ 42e57778a1SJeremy Fitzhardinge #define XENFEAT_mmu_pt_update_preserve_ad 5 43e57778a1SJeremy Fitzhardinge 44923b2919SDavid Vrabel /* 45923b2919SDavid Vrabel * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel 46923b2919SDavid Vrabel * available pte bits. 47923b2919SDavid Vrabel */ 48923b2919SDavid Vrabel #define XENFEAT_gnttab_map_avail_bits 7 49923b2919SDavid Vrabel 5038e20b07SSheng Yang /* x86: Does this Xen host support the HVM callback vector type? */ 5138e20b07SSheng Yang #define XENFEAT_hvm_callback_vector 8 5238e20b07SSheng Yang 53409771d2SStefano Stabellini /* x86: pvclock algorithm is safe to use on HVM */ 54409771d2SStefano Stabellini #define XENFEAT_hvm_safe_pvclock 9 55409771d2SStefano Stabellini 563942b740SStefano Stabellini /* x86: pirq can be used by HVM guests */ 573942b740SStefano Stabellini #define XENFEAT_hvm_pirqs 10 583942b740SStefano Stabellini 59ef61ee0dSStefano Stabellini /* operation as Dom0 is supported */ 60ef61ee0dSStefano Stabellini #define XENFEAT_dom0 11 61ef61ee0dSStefano Stabellini 62a42089ddSJeremy Fitzhardinge #define XENFEAT_NR_SUBMAPS 1 63a42089ddSJeremy Fitzhardinge 64a42089ddSJeremy Fitzhardinge #endif /* __XEN_PUBLIC_FEATURES_H__ */ 65