103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/******************************************************************************
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* features.h
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*
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* Feature flags, reported by XENVER_get_features.
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*
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* Copyright (c) 2006, Keir Fraser <keir@xensource.com>
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*/
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#ifndef __XEN_PUBLIC_FEATURES_H__
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#define __XEN_PUBLIC_FEATURES_H__
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/*
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* If set, the guest does not need to write-protect its pagetables, and can
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* update them via direct writes.
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*/
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#define XENFEAT_writable_page_tables 0
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/*
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* If set, the guest does not need to write-protect its segment descriptor
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* tables, and can update them via direct writes.
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*/
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#define XENFEAT_writable_descriptor_tables 1
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/*
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* If set, translation between the guest's 'pseudo-physical' address space
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* and the host's machine address space are handled by the hypervisor. In this
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* mode the guest does not need to perform phys-to/from-machine translations
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* when performing page table operations.
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*/
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#define XENFEAT_auto_translated_physmap 2
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/* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */
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#define XENFEAT_supervisor_mode_kernel 3
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/*
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* If set, the guest does not need to allocate x86 PAE page directories
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* below 4GB. This flag is usually implied by auto_translated_physmap.
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*/
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#define XENFEAT_pae_pgdir_above_4gb 4
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/* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */
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#define XENFEAT_mmu_pt_update_preserve_ad 5
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/* x86: Does this Xen host support the MMU_{CLEAR,COPY}_PAGE hypercall? */
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#define XENFEAT_highmem_assist 6
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/*
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* If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel
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* available pte bits.
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*/
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#define XENFEAT_gnttab_map_avail_bits 7
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/* x86: Does this Xen host support the HVM callback vector type? */
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#define XENFEAT_hvm_callback_vector 8
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/* x86: pvclock algorithm is safe to use on HVM */
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#define XENFEAT_hvm_safe_pvclock 9
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/* x86: pirq can be used by HVM guests */
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#define XENFEAT_hvm_pirqs 10
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/* operation as Dom0 is supported */
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#define XENFEAT_dom0 11
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/* Xen also maps grant references at pfn = mfn.
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* This feature flag is deprecated and should not be used.
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#define XENFEAT_grant_map_identity 12
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*/
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/* Guest can use XENMEMF_vnode to specify virtual node for memory op. */
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#define XENFEAT_memory_op_vnode_supported 13
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/* arm: Hypervisor supports ARM SMC calling convention. */
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#define XENFEAT_ARM_SMCCC_supported 14
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/*
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* x86/PVH: If set, ACPI RSDP can be placed at any address. Otherwise RSDP
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* must be located in lower 1MB, as required by ACPI Specification for IA-PC
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* systems.
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* This feature flag is only consulted if XEN_ELFNOTE_GUEST_OS contains
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* the "linux" string.
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*/
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#define XENFEAT_linux_rsdp_unrestricted 15
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/*
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* A direct-mapped (or 1:1 mapped) domain is a domain for which its
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* local pages have gfn == mfn. If a domain is direct-mapped,
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* XENFEAT_direct_mapped is set; otherwise XENFEAT_not_direct_mapped
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* is set.
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*
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* If neither flag is set (e.g. older Xen releases) the assumptions are:
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* - not auto_translated domains (x86 only) are always direct-mapped
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* - on x86, auto_translated domains are not direct-mapped
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* - on ARM, Dom0 is direct-mapped, DomUs are not
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*/
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#define XENFEAT_not_direct_mapped 16
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#define XENFEAT_direct_mapped 17
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#define XENFEAT_NR_SUBMAPS 1
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#endif /* __XEN_PUBLIC_FEATURES_H__ */
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