123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102 |
- /* 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 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
- #define XENFEAT_NR_SUBMAPS 1
- #endif /* __XEN_PUBLIC_FEATURES_H__ */
|