1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* 4 * This file contains definitions from the Hyper-V Hypervisor Top-Level 5 * Functional Specification (TLFS): 6 * https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs 7 * 8 * Copyright (C) 2021, Microsoft, Inc. 9 * 10 * Author : Michael Kelley <mikelley@microsoft.com> 11 */ 12 13 #ifndef _ASM_HYPERV_TLFS_H 14 #define _ASM_HYPERV_TLFS_H 15 16 #include <linux/types.h> 17 18 /* 19 * All data structures defined in the TLFS that are shared between Hyper-V 20 * and a guest VM use Little Endian byte ordering. This matches the default 21 * byte ordering of Linux running on ARM64, so no special handling is required. 22 */ 23 24 /* 25 * These Hyper-V registers provide information equivalent to the CPUID 26 * instruction on x86/x64. 27 */ 28 #define HV_REGISTER_HYPERVISOR_VERSION 0x00000100 /*CPUID 0x40000002 */ 29 #define HV_REGISTER_FEATURES 0x00000200 /*CPUID 0x40000003 */ 30 #define HV_REGISTER_ENLIGHTENMENTS 0x00000201 /*CPUID 0x40000004 */ 31 32 /* 33 * Group C Features. See the asm-generic version of hyperv-tlfs.h 34 * for a description of Feature Groups. 35 */ 36 37 /* Crash MSRs available */ 38 #define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE BIT(8) 39 40 /* STIMER direct mode is available */ 41 #define HV_STIMER_DIRECT_MODE_AVAILABLE BIT(13) 42 43 /* 44 * Synthetic register definitions equivalent to MSRs on x86/x64 45 */ 46 #define HV_REGISTER_CRASH_P0 0x00000210 47 #define HV_REGISTER_CRASH_P1 0x00000211 48 #define HV_REGISTER_CRASH_P2 0x00000212 49 #define HV_REGISTER_CRASH_P3 0x00000213 50 #define HV_REGISTER_CRASH_P4 0x00000214 51 #define HV_REGISTER_CRASH_CTL 0x00000215 52 53 #define HV_REGISTER_GUEST_OSID 0x00090002 54 #define HV_REGISTER_VP_INDEX 0x00090003 55 #define HV_REGISTER_TIME_REF_COUNT 0x00090004 56 #define HV_REGISTER_REFERENCE_TSC 0x00090017 57 58 #define HV_REGISTER_SINT0 0x000A0000 59 #define HV_REGISTER_SCONTROL 0x000A0010 60 #define HV_REGISTER_SIEFP 0x000A0012 61 #define HV_REGISTER_SIMP 0x000A0013 62 #define HV_REGISTER_EOM 0x000A0014 63 64 #define HV_REGISTER_STIMER0_CONFIG 0x000B0000 65 #define HV_REGISTER_STIMER0_COUNT 0x000B0001 66 67 #include <asm-generic/hyperv-tlfs.h> 68 69 #endif 70