| 1 |
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| 2 | |
| 3 | * features.h
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| 4 | *
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| 5 | * Feature flags, reported by XENVER_get_features.
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| 6 | *
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| 7 | * Copyright (c) 2006, Keir Fraser <[email protected]>
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| 8 |
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| 9 |
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| 10 | #ifndef __XEN_PUBLIC_FEATURES_H__
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| 11 | #define __XEN_PUBLIC_FEATURES_H__
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| 12 |
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| 13 | |
| 14 | * If set, the guest does not need to write-protect its pagetables, and can
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| 15 | * update them via direct writes.
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| 16 |
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| 17 | #define XENFEAT_writable_page_tables 0
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| 18 |
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| 19 | |
| 20 | * If set, the guest does not need to write-protect its segment descriptor
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| 21 | * tables, and can update them via direct writes.
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| 22 |
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| 23 | #define XENFEAT_writable_descriptor_tables 1
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| 24 |
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| 25 | |
| 26 | * If set, translation between the guest's 'pseudo-physical' address space
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| 27 | * and the host's machine address space are handled by the hypervisor. In this
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| 28 | * mode the guest does not need to perform phys-to/from-machine translations
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| 29 | * when performing page table operations.
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| 30 |
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| 31 | #define XENFEAT_auto_translated_physmap 2
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| 32 |
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| 33 |
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| 34 | #define XENFEAT_supervisor_mode_kernel 3
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| 35 |
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| 36 | |
| 37 | * If set, the guest does not need to allocate x86 PAE page directories
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| 38 | * below 4GB. This flag is usually implied by auto_translated_physmap.
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| 39 |
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| 40 | #define XENFEAT_pae_pgdir_above_4gb 4
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| 41 |
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| 42 |
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| 43 | #define XENFEAT_mmu_pt_update_preserve_ad 5
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| 44 |
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| 45 |
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| 46 | #define XENFEAT_highmem_assist 6
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| 47 |
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| 48 | |
| 49 | * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel
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| 50 | * available pte bits.
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| 51 |
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| 52 | #define XENFEAT_gnttab_map_avail_bits 7
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| 53 |
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| 54 |
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| 55 | #define XENFEAT_hvm_callback_vector 8
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| 56 |
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| 57 |
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| 58 | #define XENFEAT_hvm_safe_pvclock 9
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| 59 |
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| 60 |
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| 61 | #define XENFEAT_hvm_pirqs 10
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| 62 |
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| 63 |
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| 64 | #define XENFEAT_dom0 11
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| 65 |
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| 66 | |
| 67 | * This feature flag is deprecated and should not be used.
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| 68 | #define XENFEAT_grant_map_identity 12
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| 69 |
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| 70 |
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| 71 |
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| 72 | #define XENFEAT_memory_op_vnode_supported 13
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| 73 |
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| 74 |
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| 75 | #define XENFEAT_ARM_SMCCC_supported 14
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| 76 |
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| 77 | |
| 78 | * x86/PVH: If set, ACPI RSDP can be placed at any address. Otherwise RSDP
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| 79 | * must be located in lower 1MB, as required by ACPI Specification for IA-PC
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| 80 | * systems.
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| 81 | * This feature flag is only consulted if XEN_ELFNOTE_GUEST_OS contains
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| 82 | * the "linux" string.
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| 83 |
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| 84 | #define XENFEAT_linux_rsdp_unrestricted 15
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| 85 |
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| 86 | |
| 87 | * A direct-mapped (or 1:1 mapped) domain is a domain for which its
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| 88 | * local pages have gfn == mfn. If a domain is direct-mapped,
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| 89 | * XENFEAT_direct_mapped is set; otherwise XENFEAT_not_direct_mapped
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| 90 | * is set.
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| 91 | *
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| 92 | * If neither flag is set (e.g. older Xen releases) the assumptions are:
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| 93 | * - not auto_translated domains (x86 only) are always direct-mapped
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| 94 | * - on x86, auto_translated domains are not direct-mapped
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| 95 | * - on ARM, Dom0 is direct-mapped, DomUs are not
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| 96 |
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| 97 | #define XENFEAT_not_direct_mapped 16
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| 98 | #define XENFEAT_direct_mapped 17
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| 99 |
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| 100 | #define XENFEAT_NR_SUBMAPS 1
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| 101 |
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| 102 | #endif
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