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The current path of the Xen headers at /sys/xen/interface/ is not correct, as those headers are imported verbatim from the Xen sources and shouldn't be modified, as any modifications would be lost when a new version is imported. Changes to the public headers must be first done in Xen upstream so that they can be backported and new imports will already carry them. Import Xen 4.16 headers in sys/contrib/xen/. It's unlikely that we will import different Xen code, so don't place them inside of any subdirectory. If in the future other pieces of Xen code need to be imported the headers will need to move into an include/ subdirectory. Note that this commit does not yet modify the include path to use the newly imported headers. Sponsored by: Citrix Systems R&D
119 lines
4.4 KiB
C
119 lines
4.4 KiB
C
/******************************************************************************
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* arch-x86/cpuid.h
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*
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* CPUID interface to Xen.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Copyright (c) 2007 Citrix Systems, Inc.
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*
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* Authors:
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* Keir Fraser <keir@xen.org>
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*/
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#ifndef __XEN_PUBLIC_ARCH_X86_CPUID_H__
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#define __XEN_PUBLIC_ARCH_X86_CPUID_H__
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/*
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* For compatibility with other hypervisor interfaces, the Xen cpuid leaves
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* can be found at the first otherwise unused 0x100 aligned boundary starting
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* from 0x40000000.
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*
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* e.g If viridian extensions are enabled for an HVM domain, the Xen cpuid
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* leaves will start at 0x40000100
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*/
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#define XEN_CPUID_FIRST_LEAF 0x40000000
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#define XEN_CPUID_LEAF(i) (XEN_CPUID_FIRST_LEAF + (i))
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/*
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* Leaf 1 (0x40000x00)
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* EAX: Largest Xen-information leaf. All leaves up to an including @EAX
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* are supported by the Xen host.
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* EBX-EDX: "XenVMMXenVMM" signature, allowing positive identification
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* of a Xen host.
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*/
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#define XEN_CPUID_SIGNATURE_EBX 0x566e6558 /* "XenV" */
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#define XEN_CPUID_SIGNATURE_ECX 0x65584d4d /* "MMXe" */
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#define XEN_CPUID_SIGNATURE_EDX 0x4d4d566e /* "nVMM" */
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/*
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* Leaf 2 (0x40000x01)
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* EAX[31:16]: Xen major version.
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* EAX[15: 0]: Xen minor version.
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* EBX-EDX: Reserved (currently all zeroes).
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*/
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/*
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* Leaf 3 (0x40000x02)
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* EAX: Number of hypercall transfer pages. This register is always guaranteed
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* to specify one hypercall page.
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* EBX: Base address of Xen-specific MSRs.
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* ECX: Features 1. Unused bits are set to zero.
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* EDX: Features 2. Unused bits are set to zero.
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*/
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/* Does the host support MMU_PT_UPDATE_PRESERVE_AD for this guest? */
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#define _XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD 0
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#define XEN_CPUID_FEAT1_MMU_PT_UPDATE_PRESERVE_AD (1u<<0)
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/*
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* Leaf 4 (0x40000x03)
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* Sub-leaf 0: EAX: bit 0: emulated tsc
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* bit 1: host tsc is known to be reliable
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* bit 2: RDTSCP instruction available
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* EBX: tsc_mode: 0=default (emulate if necessary), 1=emulate,
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* 2=no emulation, 3=no emulation + TSC_AUX support
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* ECX: guest tsc frequency in kHz
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* EDX: guest tsc incarnation (migration count)
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* Sub-leaf 1: EAX: tsc offset low part
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* EBX: tsc offset high part
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* ECX: multiplicator for tsc->ns conversion
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* EDX: shift amount for tsc->ns conversion
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* Sub-leaf 2: EAX: host tsc frequency in kHz
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*/
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/*
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* Leaf 5 (0x40000x04)
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* HVM-specific features
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* Sub-leaf 0: EAX: Features
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* Sub-leaf 0: EBX: vcpu id (iff EAX has XEN_HVM_CPUID_VCPU_ID_PRESENT flag)
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* Sub-leaf 0: ECX: domain id (iff EAX has XEN_HVM_CPUID_DOMID_PRESENT flag)
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*/
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#define XEN_HVM_CPUID_APIC_ACCESS_VIRT (1u << 0) /* Virtualized APIC registers */
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#define XEN_HVM_CPUID_X2APIC_VIRT (1u << 1) /* Virtualized x2APIC accesses */
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/* Memory mapped from other domains has valid IOMMU entries */
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#define XEN_HVM_CPUID_IOMMU_MAPPINGS (1u << 2)
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#define XEN_HVM_CPUID_VCPU_ID_PRESENT (1u << 3) /* vcpu id is present in EBX */
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#define XEN_HVM_CPUID_DOMID_PRESENT (1u << 4) /* domid is present in ECX */
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/*
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* Leaf 6 (0x40000x05)
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* PV-specific parameters
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* Sub-leaf 0: EAX: max available sub-leaf
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* Sub-leaf 0: EBX: bits 0-7: max machine address width
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*/
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/* Max. address width in bits taking memory hotplug into account. */
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#define XEN_CPUID_MACHINE_ADDRESS_WIDTH_MASK (0xffu << 0)
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#define XEN_CPUID_MAX_NUM_LEAVES 5
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#endif /* __XEN_PUBLIC_ARCH_X86_CPUID_H__ */
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