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Annotation of Gnu-Mach/xen/public/features.h, revision 1.1.1.1

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

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