/* 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__
/*
* 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 4 GB . 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 1 MB , 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__ */
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