| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /****************************************************************************** |
| 3 | * features.h |
| 4 | * |
| 5 | * Feature flags, reported by XENVER_get_features. |
| 6 | * |
| 7 | * Copyright (c) 2006, Keir Fraser <keir@xensource.com> |
| 8 | */ |
| 9 | |
| 10 | #ifndef __XEN_PUBLIC_FEATURES_H__ |
| 11 | #define __XEN_PUBLIC_FEATURES_H__ |
| 12 | |
| 13 | /* |
| 14 | * If set, the guest does not need to write-protect its pagetables, and can |
| 15 | * update them via direct writes. |
| 16 | */ |
| 17 | #define XENFEAT_writable_page_tables 0 |
| 18 | |
| 19 | /* |
| 20 | * If set, the guest does not need to write-protect its segment descriptor |
| 21 | * tables, and can update them via direct writes. |
| 22 | */ |
| 23 | #define XENFEAT_writable_descriptor_tables 1 |
| 24 | |
| 25 | /* |
| 26 | * If set, translation between the guest's 'pseudo-physical' address space |
| 27 | * and the host's machine address space are handled by the hypervisor. In this |
| 28 | * mode the guest does not need to perform phys-to/from-machine translations |
| 29 | * when performing page table operations. |
| 30 | */ |
| 31 | #define XENFEAT_auto_translated_physmap 2 |
| 32 | |
| 33 | /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ |
| 34 | #define XENFEAT_supervisor_mode_kernel 3 |
| 35 | |
| 36 | /* |
| 37 | * If set, the guest does not need to allocate x86 PAE page directories |
| 38 | * below 4GB. This flag is usually implied by auto_translated_physmap. |
| 39 | */ |
| 40 | #define XENFEAT_pae_pgdir_above_4gb 4 |
| 41 | |
| 42 | /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */ |
| 43 | #define XENFEAT_mmu_pt_update_preserve_ad 5 |
| 44 | |
| 45 | /* x86: Does this Xen host support the MMU_{CLEAR,COPY}_PAGE hypercall? */ |
| 46 | #define XENFEAT_highmem_assist 6 |
| 47 | |
| 48 | /* |
| 49 | * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel |
| 50 | * available pte bits. |
| 51 | */ |
| 52 | #define XENFEAT_gnttab_map_avail_bits 7 |
| 53 | |
| 54 | /* x86: Does this Xen host support the HVM callback vector type? */ |
| 55 | #define XENFEAT_hvm_callback_vector 8 |
| 56 | |
| 57 | /* x86: pvclock algorithm is safe to use on HVM */ |
| 58 | #define XENFEAT_hvm_safe_pvclock 9 |
| 59 | |
| 60 | /* x86: pirq can be used by HVM guests */ |
| 61 | #define XENFEAT_hvm_pirqs 10 |
| 62 | |
| 63 | /* operation as Dom0 is supported */ |
| 64 | #define XENFEAT_dom0 11 |
| 65 | |
| 66 | /* Xen also maps grant references at pfn = mfn. |
| 67 | * This feature flag is deprecated and should not be used. |
| 68 | #define XENFEAT_grant_map_identity 12 |
| 69 | */ |
| 70 | |
| 71 | /* Guest can use XENMEMF_vnode to specify virtual node for memory op. */ |
| 72 | #define XENFEAT_memory_op_vnode_supported 13 |
| 73 | |
| 74 | /* arm: Hypervisor supports ARM SMC calling convention. */ |
| 75 | #define XENFEAT_ARM_SMCCC_supported 14 |
| 76 | |
| 77 | /* |
| 78 | * x86/PVH: If set, ACPI RSDP can be placed at any address. Otherwise RSDP |
| 79 | * must be located in lower 1MB, as required by ACPI Specification for IA-PC |
| 80 | * systems. |
| 81 | * This feature flag is only consulted if XEN_ELFNOTE_GUEST_OS contains |
| 82 | * the "linux" string. |
| 83 | */ |
| 84 | #define XENFEAT_linux_rsdp_unrestricted 15 |
| 85 | |
| 86 | #define XENFEAT_NR_SUBMAPS 1 |
| 87 | |
| 88 | #endif /* __XEN_PUBLIC_FEATURES_H__ */ |