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
67union hv_msi_entry {
68	u64 as_uint64[2];
69	struct {
70		u64 address;
71		u32 data;
72		u32 reserved;
73	} __packed;
74};
75
76#include <asm-generic/hyperv-tlfs.h>
77
78#endif