| /****************************************************************************** | |
| * arch-x86/cpuid.h | |
| * | |
| * CPUID interface to Xen. | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining a copy | |
| * of this software and associated documentation files (the "Software"), to | |
| * deal in the Software without restriction, including without limitation the | |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | |
| * sell copies of the Software, and to permit persons to whom the Software is | |
| * furnished to do so, subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included in | |
| * all copies or substantial portions of the Software. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
| * DEALINGS IN THE SOFTWARE. | |
| * | |
| * Copyright (c) 2007 Citrix Systems, Inc. | |
| * | |
| * Authors: | |
| * Keir Fraser <keir@xen.org> | |
| */ | |
| #ifndef __XEN_PUBLIC_ARCH_X86_CPUID_H__ | |
| #define __XEN_PUBLIC_ARCH_X86_CPUID_H__ | |
| /* | |
| * For compatibility with other hypervisor interfaces, the Xen cpuid leaves | |
| * can be found at the first otherwise unused 0x100 aligned boundary starting | |
| * from 0x40000000. | |
| * | |
| * e.g If viridian extensions are enabled for an HVM domain, the Xen cpuid | |
| * leaves will start at 0x40000100 | |
| */ | |
| #define XEN_CPUID_FIRST_LEAF 0x40000000 | |
| #define XEN_CPUID_LEAF(i) (XEN_CPUID_FIRST_LEAF + (i)) | |
| /* | |
| * Leaf 1 (0x40000x00) | |
| * EAX: Largest Xen-information leaf. All leaves up to an including @EAX | |
| * are supported by the Xen host. | |
| * EBX-EDX: "XenVMMXenVMM" signature, allowing positive identification | |
| * of a Xen host. | |
| */ | |
| #define XEN_CPUID_SIGNATURE_EBX 0x566e6558 /* "XenV" */ | |
| #define XEN_CPUID_SIGNATURE_ECX 0x65584d4d /* "MMXe" */ | |
| #define XEN_CPUID_SIGNATURE_EDX 0x4d4d566e /* "nVMM" */ | |
| /* | |
| * Leaf 2 (0x40000x01) | |
| * EAX[31:16]: Xen major version. | |
| * EAX[15: 0]: Xen minor version. | |
| * EBX-EDX: Reserved (currently all zeroes). | |
| */ | |
| /* | |
| * Leaf 3 (0x40000x02) | |
| * EAX: Number of hypercall transfer pages. This register is always guaranteed | |
| * to specify one hypercall page. | |
| * EBX: Base address of Xen-specific MSRs. | |
| * ECX: Features 1. Unused bits are set to zero. | |
| * EDX: Features 2. Unused bits are set to zero. | |
| */ | |
| /* Does the host support MMU_PT_UPDATE_PRESERVE_AD for this guest? */ | |
| #define _XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD 0 | |
| #define XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD (1u<<0) | |
| /* | |
| * Leaf 5 (0x40000x04) | |
| * HVM-specific features | |
| * EAX: Features | |
| * EBX: vcpu id (iff EAX has XEN_HVM_CPUID_VCPU_ID_PRESENT flag) | |
| */ | |
| /* Virtualized APIC registers */ | |
| #define XEN_HVM_CPUID_APIC_ACCESS_VIRT (1u << 0) | |
| /* Virtualized x2APIC accesses */ | |
| #define XEN_HVM_CPUID_X2APIC_VIRT (1u << 1) | |
| /* Memory mapped from other domains has valid IOMMU entries */ | |
| #define XEN_HVM_CPUID_IOMMU_MAPPINGS (1u << 2) | |
| /* vcpu id is present in EBX */ | |
| #define XEN_HVM_CPUID_VCPU_ID_PRESENT (1u << 3) | |
| #define XEN_CPUID_MAX_NUM_LEAVES 4 | |
| #endif /* __XEN_PUBLIC_ARCH_X86_CPUID_H__ */ |