iPXE
features.h
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00001 /******************************************************************************
00002  * features.h
00003  *
00004  * Feature flags, reported by XENVER_get_features.
00005  *
00006  * Permission is hereby granted, free of charge, to any person obtaining a copy
00007  * of this software and associated documentation files (the "Software"), to
00008  * deal in the Software without restriction, including without limitation the
00009  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
00010  * sell copies of the Software, and to permit persons to whom the Software is
00011  * furnished to do so, subject to the following conditions:
00012  *
00013  * The above copyright notice and this permission notice shall be included in
00014  * all copies or substantial portions of the Software.
00015  *
00016  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00017  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00018  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00019  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00020  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
00021  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
00022  * DEALINGS IN THE SOFTWARE.
00023  *
00024  * Copyright (c) 2006, Keir Fraser <keir@xensource.com>
00025  */
00026 
00027 #ifndef __XEN_PUBLIC_FEATURES_H__
00028 #define __XEN_PUBLIC_FEATURES_H__
00029 
00030 FILE_LICENCE ( MIT );
00031 
00032 /*
00033  * `incontents 200 elfnotes_features XEN_ELFNOTE_FEATURES
00034  *
00035  * The list of all the features the guest supports. They are set by
00036  * parsing the XEN_ELFNOTE_FEATURES and XEN_ELFNOTE_SUPPORTED_FEATURES
00037  * string. The format is the  feature names (as given here without the
00038  * "XENFEAT_" prefix) separated by '|' characters.
00039  * If a feature is required for the kernel to function then the feature name
00040  * must be preceded by a '!' character.
00041  *
00042  * Note that if XEN_ELFNOTE_SUPPORTED_FEATURES is used, then in the
00043  * XENFEAT_dom0 MUST be set if the guest is to be booted as dom0,
00044  */
00045 
00046 /*
00047  * If set, the guest does not need to write-protect its pagetables, and can
00048  * update them via direct writes.
00049  */
00050 #define XENFEAT_writable_page_tables       0
00051 
00052 /*
00053  * If set, the guest does not need to write-protect its segment descriptor
00054  * tables, and can update them via direct writes.
00055  */
00056 #define XENFEAT_writable_descriptor_tables 1
00057 
00058 /*
00059  * If set, translation between the guest's 'pseudo-physical' address space
00060  * and the host's machine address space are handled by the hypervisor. In this
00061  * mode the guest does not need to perform phys-to/from-machine translations
00062  * when performing page table operations.
00063  */
00064 #define XENFEAT_auto_translated_physmap    2
00065 
00066 /* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */
00067 #define XENFEAT_supervisor_mode_kernel     3
00068 
00069 /*
00070  * If set, the guest does not need to allocate x86 PAE page directories
00071  * below 4GB. This flag is usually implied by auto_translated_physmap.
00072  */
00073 #define XENFEAT_pae_pgdir_above_4gb        4
00074 
00075 /* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */
00076 #define XENFEAT_mmu_pt_update_preserve_ad  5
00077 
00078 /* x86: Does this Xen host support the MMU_{CLEAR,COPY}_PAGE hypercall? */
00079 #define XENFEAT_highmem_assist             6
00080 
00081 /*
00082  * If set, GNTTABOP_map_grant_ref honors flags to be placed into guest kernel
00083  * available pte bits.
00084  */
00085 #define XENFEAT_gnttab_map_avail_bits      7
00086 
00087 /* x86: Does this Xen host support the HVM callback vector type? */
00088 #define XENFEAT_hvm_callback_vector        8
00089 
00090 /* x86: pvclock algorithm is safe to use on HVM */
00091 #define XENFEAT_hvm_safe_pvclock           9
00092 
00093 /* x86: pirq can be used by HVM guests */
00094 #define XENFEAT_hvm_pirqs                 10
00095 
00096 /* operation as Dom0 is supported */
00097 #define XENFEAT_dom0                      11
00098 
00099 #define XENFEAT_NR_SUBMAPS 1
00100 
00101 #endif /* __XEN_PUBLIC_FEATURES_H__ */
00102 
00103 /*
00104  * Local variables:
00105  * mode: C
00106  * c-file-style: "BSD"
00107  * c-basic-offset: 4
00108  * tab-width: 4
00109  * indent-tabs-mode: nil
00110  * End:
00111  */