1 /* SPDX-License-Identifier: MIT */ << 2 /********************************************* 1 /****************************************************************************** 3 * features.h 2 * features.h 4 * 3 * 5 * Feature flags, reported by XENVER_get_featu 4 * Feature flags, reported by XENVER_get_features. 6 * 5 * 7 * Copyright (c) 2006, Keir Fraser <keir@xenso 6 * Copyright (c) 2006, Keir Fraser <keir@xensource.com> 8 */ 7 */ 9 8 10 #ifndef __XEN_PUBLIC_FEATURES_H__ 9 #ifndef __XEN_PUBLIC_FEATURES_H__ 11 #define __XEN_PUBLIC_FEATURES_H__ 10 #define __XEN_PUBLIC_FEATURES_H__ 12 11 13 /* 12 /* 14 * If set, the guest does not need to write-pr 13 * If set, the guest does not need to write-protect its pagetables, and can 15 * update them via direct writes. 14 * update them via direct writes. 16 */ 15 */ 17 #define XENFEAT_writable_page_tables 0 16 #define XENFEAT_writable_page_tables 0 18 17 19 /* 18 /* 20 * If set, the guest does not need to write-pr 19 * If set, the guest does not need to write-protect its segment descriptor 21 * tables, and can update them via direct writ 20 * tables, and can update them via direct writes. 22 */ 21 */ 23 #define XENFEAT_writable_descriptor_tables 1 22 #define XENFEAT_writable_descriptor_tables 1 24 23 25 /* 24 /* 26 * If set, translation between the guest's 'ps 25 * If set, translation between the guest's 'pseudo-physical' address space 27 * and the host's machine address space are ha 26 * and the host's machine address space are handled by the hypervisor. In this 28 * mode the guest does not need to perform phy 27 * mode the guest does not need to perform phys-to/from-machine translations 29 * when performing page table operations. 28 * when performing page table operations. 30 */ 29 */ 31 #define XENFEAT_auto_translated_physmap 2 30 #define XENFEAT_auto_translated_physmap 2 32 31 33 /* If set, the guest is running in supervisor 32 /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ 34 #define XENFEAT_supervisor_mode_kernel 3 33 #define XENFEAT_supervisor_mode_kernel 3 35 34 36 /* 35 /* 37 * If set, the guest does not need to allocate 36 * If set, the guest does not need to allocate x86 PAE page directories 38 * below 4GB. This flag is usually implied by 37 * below 4GB. This flag is usually implied by auto_translated_physmap. 39 */ 38 */ 40 #define XENFEAT_pae_pgdir_above_4gb 4 39 #define XENFEAT_pae_pgdir_above_4gb 4 41 40 42 /* x86: Does this Xen host support the MMU_PT_ 41 /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */ 43 #define XENFEAT_mmu_pt_update_preserve_ad 5 42 #define XENFEAT_mmu_pt_update_preserve_ad 5 44 43 45 /* x86: Does this Xen host support the MMU_{CL << 46 #define XENFEAT_highmem_assist 6 << 47 << 48 /* 44 /* 49 * If set, GNTTABOP_map_grant_ref honors flags 45 * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel 50 * available pte bits. 46 * available pte bits. 51 */ 47 */ 52 #define XENFEAT_gnttab_map_avail_bits 7 48 #define XENFEAT_gnttab_map_avail_bits 7 53 49 54 /* x86: Does this Xen host support the HVM cal 50 /* x86: Does this Xen host support the HVM callback vector type? */ 55 #define XENFEAT_hvm_callback_vector 8 51 #define XENFEAT_hvm_callback_vector 8 56 52 57 /* x86: pvclock algorithm is safe to use on HV 53 /* x86: pvclock algorithm is safe to use on HVM */ 58 #define XENFEAT_hvm_safe_pvclock 9 54 #define XENFEAT_hvm_safe_pvclock 9 59 55 60 /* x86: pirq can be used by HVM guests */ 56 /* x86: pirq can be used by HVM guests */ 61 #define XENFEAT_hvm_pirqs 10 57 #define XENFEAT_hvm_pirqs 10 62 58 63 /* operation as Dom0 is supported */ 59 /* operation as Dom0 is supported */ 64 #define XENFEAT_dom0 11 60 #define XENFEAT_dom0 11 65 << 66 /* Xen also maps grant references at pfn = mfn << 67 * This feature flag is deprecated and should << 68 #define XENFEAT_grant_map_identity 12 << 69 */ << 70 << 71 /* Guest can use XENMEMF_vnode to specify virt << 72 #define XENFEAT_memory_op_vnode_supported 13 << 73 << 74 /* arm: Hypervisor supports ARM SMC calling co << 75 #define XENFEAT_ARM_SMCCC_supported 14 << 76 << 77 /* << 78 * x86/PVH: If set, ACPI RSDP can be placed at << 79 * must be located in lower 1MB, as required b << 80 * systems. << 81 * This feature flag is only consulted if XEN_ << 82 * the "linux" string. << 83 */ << 84 #define XENFEAT_linux_rsdp_unrestricted 15 << 85 << 86 /* << 87 * A direct-mapped (or 1:1 mapped) domain is a << 88 * local pages have gfn == mfn. If a domain is << 89 * XENFEAT_direct_mapped is set; otherwise XEN << 90 * is set. << 91 * << 92 * If neither flag is set (e.g. older Xen rele << 93 * - not auto_translated domains (x86 only) ar << 94 * - on x86, auto_translated domains are not d << 95 * - on ARM, Dom0 is direct-mapped, DomUs are << 96 */ << 97 #define XENFEAT_not_direct_mapped 16 << 98 #define XENFEAT_direct_mapped 17 << 99 61 100 #define XENFEAT_NR_SUBMAPS 1 62 #define XENFEAT_NR_SUBMAPS 1 101 63 102 #endif /* __XEN_PUBLIC_FEATURES_H__ */ 64 #endif /* __XEN_PUBLIC_FEATURES_H__ */ 103 65
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