/* SPDX-License-Identifier: MIT */ /****************************************************************************** * features.h * * Feature flags, reported by XENVER_get_features. * * Copyright (c) 2006, Keir Fraser <[email protected]> */ #ifndef __XEN_PUBLIC_FEATURES_H__ #define __XEN_PUBLIC_FEATURES_H__ /* * If set, the guest does not need to write-protect its pagetables, and can * update them via direct writes. */ #define XENFEAT_writable_page_tables … /* * If set, the guest does not need to write-protect its segment descriptor * tables, and can update them via direct writes. */ #define XENFEAT_writable_descriptor_tables … /* * If set, translation between the guest's 'pseudo-physical' address space * and the host's machine address space are handled by the hypervisor. In this * mode the guest does not need to perform phys-to/from-machine translations * when performing page table operations. */ #define XENFEAT_auto_translated_physmap … /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ #define XENFEAT_supervisor_mode_kernel … /* * If set, the guest does not need to allocate x86 PAE page directories * below 4GB. This flag is usually implied by auto_translated_physmap. */ #define XENFEAT_pae_pgdir_above_4gb … /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */ #define XENFEAT_mmu_pt_update_preserve_ad … /* x86: Does this Xen host support the MMU_{CLEAR,COPY}_PAGE hypercall? */ #define XENFEAT_highmem_assist … /* * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel * available pte bits. */ #define XENFEAT_gnttab_map_avail_bits … /* x86: Does this Xen host support the HVM callback vector type? */ #define XENFEAT_hvm_callback_vector … /* x86: pvclock algorithm is safe to use on HVM */ #define XENFEAT_hvm_safe_pvclock … /* x86: pirq can be used by HVM guests */ #define XENFEAT_hvm_pirqs … /* operation as Dom0 is supported */ #define XENFEAT_dom0 … /* Xen also maps grant references at pfn = mfn. * This feature flag is deprecated and should not be used. #define XENFEAT_grant_map_identity 12 */ /* Guest can use XENMEMF_vnode to specify virtual node for memory op. */ #define XENFEAT_memory_op_vnode_supported … /* arm: Hypervisor supports ARM SMC calling convention. */ #define XENFEAT_ARM_SMCCC_supported … /* * x86/PVH: If set, ACPI RSDP can be placed at any address. Otherwise RSDP * must be located in lower 1MB, as required by ACPI Specification for IA-PC * systems. * This feature flag is only consulted if XEN_ELFNOTE_GUEST_OS contains * the "linux" string. */ #define XENFEAT_linux_rsdp_unrestricted … /* * A direct-mapped (or 1:1 mapped) domain is a domain for which its * local pages have gfn == mfn. If a domain is direct-mapped, * XENFEAT_direct_mapped is set; otherwise XENFEAT_not_direct_mapped * is set. * * If neither flag is set (e.g. older Xen releases) the assumptions are: * - not auto_translated domains (x86 only) are always direct-mapped * - on x86, auto_translated domains are not direct-mapped * - on ARM, Dom0 is direct-mapped, DomUs are not */ #define XENFEAT_not_direct_mapped … #define XENFEAT_direct_mapped … #define XENFEAT_NR_SUBMAPS … #endif /* __XEN_PUBLIC_FEATURES_H__ */
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