sys/arch/xen/include/xen3-public/arch-x86/cpuid.h

   1 /******************************************************************************
   2  * arch-x86/cpuid.h
   3  *
   4  * CPUID interface to Xen.
   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) 2007 Citrix Systems, Inc.
  25  *
  26  * Authors:
  27  *    Keir Fraser <keir.fraser@citrix.com>
  28  */
  29
  30 #ifndef __XEN_PUBLIC_ARCH_X86_CPUID_H__
  31 #define __XEN_PUBLIC_ARCH_X86_CPUID_H__
  32
  33 /* Xen identification leaves start at 0x40000000. */
  34 #define XEN_CPUID_FIRST_LEAF 0x40000000
  35 #define XEN_CPUID_LEAF(i)    (XEN_CPUID_FIRST_LEAF + (i))
  36
  37 /*
  38  * Leaf 1 (0x40000000)
  39  * EAX: Largest Xen-information leaf. All leaves up to an including @EAX
  40  *      are supported by the Xen host.
  41  * EBX-EDX: "XenVMMXenVMM" signature, allowing positive identification
  42  *      of a Xen host.
  43  */
  44 #define XEN_CPUID_SIGNATURE_EBX 0x566e6558 /* "XenV" */
  45 #define XEN_CPUID_SIGNATURE_ECX 0x65584d4d /* "MMXe" */
  46 #define XEN_CPUID_SIGNATURE_EDX 0x4d4d566e /* "nVMM" */
  47
  48 /*
  49  * Leaf 2 (0x40000001)
  50  * EAX[31:16]: Xen major version.
  51  * EAX[15: 0]: Xen minor version.
  52  * EBX-EDX: Reserved (currently all zeroes).
  53  */
  54
  55 /*
  56  * Leaf 3 (0x40000002)
  57  * EAX: Number of hypercall transfer pages. This register is always guaranteed
  58  *      to specify one hypercall page.
  59  * EBX: Base address of Xen-specific MSRs.
  60  * ECX: Features 1. Unused bits are set to zero.
  61  * EDX: Features 2. Unused bits are set to zero.
  62  */
  63
  64 /* Does the host support MMU_PT_UPDATE_PRESERVE_AD for this guest? */
  65 #define _XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD 0
  66 #define XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD  (1u<<0)
  67
  68 #endif /* __XEN_PUBLIC_ARCH_X86_CPUID_H__ */