1 /* SPDX-License-Identifier: GPL-2.0 */
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
8 * Copyright (C) 2021, Microsoft, Inc.
10 * Author : Michael Kelley <mikelley@microsoft.com>
13 #ifndef _ASM_HYPERV_TLFS_H
14 #define _ASM_HYPERV_TLFS_H
16 #include <linux/types.h>
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.
25 * These Hyper-V registers provide information equivalent to the CPUID
26 * instruction on x86/x64.
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 */
33 * Group C Features. See the asm-generic version of hyperv-tlfs.h
34 * for a description of Feature Groups.
37 /* Crash MSRs available */
38 #define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE BIT(8)
40 /* STIMER direct mode is available */
41 #define HV_STIMER_DIRECT_MODE_AVAILABLE BIT(13)
44 * Synthetic register definitions equivalent to MSRs on x86/x64
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
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
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
64 #define HV_REGISTER_STIMER0_CONFIG 0x000B0000
65 #define HV_REGISTER_STIMER0_COUNT 0x000B0001
76 #include <asm-generic/hyperv-tlfs.h>