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