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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