47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/******************************************************************************
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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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#define XENFEAT_NR_SUBMAPS 1
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#endif /* __XEN_PUBLIC_FEATURES_H__ */
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