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__ */ 69