/* SPDX-License-Identifier: MIT */ /****************************************************************************** * features.h * * Feature flags, reported by XENVER_get_features. * * Copyright (c) 2006, Keir Fraser <keir@xensource.com> */ #ifndef __XEN_PUBLIC_FEATURES_H__ #define __XEN_PUBLIC_FEATURES_H__ /* * `incontents 200 elfnotes_features XEN_ELFNOTE_FEATURES * * The list of all the features the guest supports. They are set by * parsing the XEN_ELFNOTE_FEATURES and XEN_ELFNOTE_SUPPORTED_FEATURES * string. The format is the feature names (as given here without the * "XENFEAT_" prefix) separated by '|' characters. * If a feature is required for the kernel to function then the feature name * must be preceded by a '!' character. * * Note that if XEN_ELFNOTE_SUPPORTED_FEATURES is used, then in the * XENFEAT_dom0 MUST be set if the guest is to be booted as dom0, */ /* * If set, the guest does not need to write-protect its pagetables, and can * update them via direct writes. */ #define XENFEAT_writable_page_tables 0 /* * 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 1 /* * 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 2 /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */ #define XENFEAT_supervisor_mode_kernel 3 /* * 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 4 /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */ #define XENFEAT_mmu_pt_update_preserve_ad 5 /* x86: Does this Xen host support the MMU_{CLEAR,COPY}_PAGE hypercall? */ #define XENFEAT_highmem_assist 6 /* * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel * available pte bits. */ #define XENFEAT_gnttab_map_avail_bits 7 /* x86: Does this Xen host support the HVM callback vector type? */ #define XENFEAT_hvm_callback_vector 8 /* x86: pvclock algorithm is safe to use on HVM */ #define XENFEAT_hvm_safe_pvclock 9 /* x86: pirq can be used by HVM guests */ #define XENFEAT_hvm_pirqs 10 /* operation as Dom0 is supported */ #define XENFEAT_dom0 11 /* 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 13 /* arm: Hypervisor supports ARM SMC calling convention. */ #define XENFEAT_ARM_SMCCC_supported 14 /* * 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 15 /* * 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 16 #define XENFEAT_direct_mapped 17 /* * Signal whether the domain is able to use the following hypercalls: * * VCPUOP_register_runstate_phys_area * VCPUOP_register_vcpu_time_phys_area */ #define XENFEAT_runstate_phys_area 18 #define XENFEAT_vcpu_time_phys_area 19 #define XENFEAT_NR_SUBMAPS 1 #endif /* __XEN_PUBLIC_FEATURES_H__ */ /* * Local variables: * mode: C * c-file-style: "BSD" * c-basic-offset: 4 * tab-width: 4 * indent-tabs-mode: nil * End: */