1/* $NetBSD: features.h,v 1.1.1.2 2011/12/07 14:41:15 cegger Exp $ */
2/******************************************************************************
3 * features.h
4 *
5 * Feature flags, reported by XENVER_get_features.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to
9 * deal in the Software without restriction, including without limitation the
10 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
11 * sell copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 *
25 * Copyright (c) 2006, Keir Fraser <keir@xensource.com>
26 */
27
28#ifndef __XEN_PUBLIC_FEATURES_H__
29#define __XEN_PUBLIC_FEATURES_H__
30
31/*
32 * If set, the guest does not need to write-protect its pagetables, and can
33 * update them via direct writes.
34 */
35#define XENFEAT_writable_page_tables 0
36
37/*
38 * If set, the guest does not need to write-protect its segment descriptor
39 * tables, and can update them via direct writes.
40 */
41#define XENFEAT_writable_descriptor_tables 1
42
43/*
44 * If set, translation between the guest's 'pseudo-physical' address space
45 * and the host's machine address space are handled by the hypervisor. In this
46 * mode the guest does not need to perform phys-to/from-machine translations
47 * when performing page table operations.
48 */
49#define XENFEAT_auto_translated_physmap 2
50
51/* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */
52#define XENFEAT_supervisor_mode_kernel 3
53
54/*
55 * If set, the guest does not need to allocate x86 PAE page directories
56 * below 4GB. This flag is usually implied by auto_translated_physmap.
57 */
58#define XENFEAT_pae_pgdir_above_4gb 4
59
60/* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */
61#define XENFEAT_mmu_pt_update_preserve_ad 5
62
63/* x86: Does this Xen host support the MMU_{CLEAR,COPY}_PAGE hypercall? */
64#define XENFEAT_highmem_assist 6
65
66/*
67 * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel
68 * available pte bits.
69 */
70#define XENFEAT_gnttab_map_avail_bits 7
71
72/* x86: Does this Xen host support the HVM callback vector type? */
73#define XENFEAT_hvm_callback_vector 8
74
75/* x86: pvclock algorithm is safe to use on HVM */
76#define XENFEAT_hvm_safe_pvclock 9
77
78/* x86: pirq can be used by HVM guests */
79#define XENFEAT_hvm_pirqs 10
80
81#define XENFEAT_NR_SUBMAPS 1
82
83#endif /* __XEN_PUBLIC_FEATURES_H__ */
84
85/*
86 * Local variables:
87 * mode: C
88 * c-set-style: "BSD"
89 * c-basic-offset: 4
90 * tab-width: 4
91 * indent-tabs-mode: nil
92 * End:
93 */
94