1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2a42089ddSJeremy Fitzhardinge /****************************************************************************** 3a42089ddSJeremy Fitzhardinge * features.h 4a42089ddSJeremy Fitzhardinge * 5a42089ddSJeremy Fitzhardinge * Feature flags, reported by XENVER_get_features. 6a42089ddSJeremy Fitzhardinge * 7a42089ddSJeremy Fitzhardinge * Copyright (c) 2006, Keir Fraser <keir@xensource.com> 8a42089ddSJeremy Fitzhardinge */ 9a42089ddSJeremy Fitzhardinge 10a42089ddSJeremy Fitzhardinge #ifndef __XEN_PUBLIC_FEATURES_H__ 11a42089ddSJeremy Fitzhardinge #define __XEN_PUBLIC_FEATURES_H__ 12a42089ddSJeremy Fitzhardinge 13a42089ddSJeremy Fitzhardinge /* 14a42089ddSJeremy Fitzhardinge * If set, the guest does not need to write-protect its pagetables, and can 15a42089ddSJeremy Fitzhardinge * update them via direct writes. 16a42089ddSJeremy Fitzhardinge */ 17a42089ddSJeremy Fitzhardinge #define XENFEAT_writable_page_tables 0 18a42089ddSJeremy Fitzhardinge 19a42089ddSJeremy Fitzhardinge /* 20a42089ddSJeremy Fitzhardinge * If set, the guest does not need to write-protect its segment descriptor 21a42089ddSJeremy Fitzhardinge * tables, and can update them via direct writes. 22a42089ddSJeremy Fitzhardinge */ 23a42089ddSJeremy Fitzhardinge #define XENFEAT_writable_descriptor_tables 1 24a42089ddSJeremy Fitzhardinge 25a42089ddSJeremy Fitzhardinge /* 26a42089ddSJeremy Fitzhardinge * If set, translation between the guest's 'pseudo-physical' address space 27a42089ddSJeremy Fitzhardinge * and the host's machine address space are handled by the hypervisor. In this 28a42089ddSJeremy Fitzhardinge * mode the guest does not need to perform phys-to/from-machine translations 29a42089ddSJeremy Fitzhardinge * when performing page table operations. 30a42089ddSJeremy Fitzhardinge */ 31a42089ddSJeremy Fitzhardinge #define XENFEAT_auto_translated_physmap 2 32a42089ddSJeremy Fitzhardinge 33a42089ddSJeremy Fitzhardinge /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ 34a42089ddSJeremy Fitzhardinge #define XENFEAT_supervisor_mode_kernel 3 35a42089ddSJeremy Fitzhardinge 36a42089ddSJeremy Fitzhardinge /* 37a42089ddSJeremy Fitzhardinge * If set, the guest does not need to allocate x86 PAE page directories 38a42089ddSJeremy Fitzhardinge * below 4GB. This flag is usually implied by auto_translated_physmap. 39a42089ddSJeremy Fitzhardinge */ 40a42089ddSJeremy Fitzhardinge #define XENFEAT_pae_pgdir_above_4gb 4 41a42089ddSJeremy Fitzhardinge 42e57778a1SJeremy Fitzhardinge /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */ 43e57778a1SJeremy Fitzhardinge #define XENFEAT_mmu_pt_update_preserve_ad 5 44e57778a1SJeremy Fitzhardinge 45a5a18ae7SBoris Ostrovsky /* x86: Does this Xen host support the MMU_{CLEAR,COPY}_PAGE hypercall? */ 46a5a18ae7SBoris Ostrovsky #define XENFEAT_highmem_assist 6 47a5a18ae7SBoris Ostrovsky 48923b2919SDavid Vrabel /* 49923b2919SDavid Vrabel * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel 50923b2919SDavid Vrabel * available pte bits. 51923b2919SDavid Vrabel */ 52923b2919SDavid Vrabel #define XENFEAT_gnttab_map_avail_bits 7 53923b2919SDavid Vrabel 5438e20b07SSheng Yang /* x86: Does this Xen host support the HVM callback vector type? */ 5538e20b07SSheng Yang #define XENFEAT_hvm_callback_vector 8 5638e20b07SSheng Yang 57409771d2SStefano Stabellini /* x86: pvclock algorithm is safe to use on HVM */ 58409771d2SStefano Stabellini #define XENFEAT_hvm_safe_pvclock 9 59409771d2SStefano Stabellini 603942b740SStefano Stabellini /* x86: pirq can be used by HVM guests */ 613942b740SStefano Stabellini #define XENFEAT_hvm_pirqs 10 623942b740SStefano Stabellini 63ef61ee0dSStefano Stabellini /* operation as Dom0 is supported */ 64ef61ee0dSStefano Stabellini #define XENFEAT_dom0 11 65ef61ee0dSStefano Stabellini 66a5a18ae7SBoris Ostrovsky /* Xen also maps grant references at pfn = mfn. 67a5a18ae7SBoris Ostrovsky * This feature flag is deprecated and should not be used. 68a5a18ae7SBoris Ostrovsky #define XENFEAT_grant_map_identity 12 69a5a18ae7SBoris Ostrovsky */ 70a5a18ae7SBoris Ostrovsky 71a5a18ae7SBoris Ostrovsky /* Guest can use XENMEMF_vnode to specify virtual node for memory op. */ 72a5a18ae7SBoris Ostrovsky #define XENFEAT_memory_op_vnode_supported 13 73a5a18ae7SBoris Ostrovsky 74a5a18ae7SBoris Ostrovsky /* arm: Hypervisor supports ARM SMC calling convention. */ 75a5a18ae7SBoris Ostrovsky #define XENFEAT_ARM_SMCCC_supported 14 76a5a18ae7SBoris Ostrovsky 77a5a18ae7SBoris Ostrovsky /* 78a5a18ae7SBoris Ostrovsky * x86/PVH: If set, ACPI RSDP can be placed at any address. Otherwise RSDP 79a5a18ae7SBoris Ostrovsky * must be located in lower 1MB, as required by ACPI Specification for IA-PC 80a5a18ae7SBoris Ostrovsky * systems. 81a5a18ae7SBoris Ostrovsky * This feature flag is only consulted if XEN_ELFNOTE_GUEST_OS contains 82a5a18ae7SBoris Ostrovsky * the "linux" string. 83a5a18ae7SBoris Ostrovsky */ 84a5a18ae7SBoris Ostrovsky #define XENFEAT_linux_rsdp_unrestricted 15 85a5a18ae7SBoris Ostrovsky 86a42089ddSJeremy Fitzhardinge #define XENFEAT_NR_SUBMAPS 1 87a42089ddSJeremy Fitzhardinge 88a42089ddSJeremy Fitzhardinge #endif /* __XEN_PUBLIC_FEATURES_H__ */ 89