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 * Group C Features. See the asm-generic version of hyperv-tlfs.h
26 * for a description of Feature Groups.
27 */
28
29/* Crash MSRs available */
30#define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE	BIT(8)
31
32/* STIMER direct mode is available */
33#define HV_STIMER_DIRECT_MODE_AVAILABLE		BIT(13)
34
35/*
36 * To support arch-generic code calling hv_set/get_register:
37 * - On x86, HV_MSR_ indicates an MSR accessed via rdmsrl/wrmsrl
38 * - On ARM, HV_MSR_ indicates a VP register accessed via hypercall
39 */
40#define HV_MSR_CRASH_P0		(HV_REGISTER_GUEST_CRASH_P0)
41#define HV_MSR_CRASH_P1		(HV_REGISTER_GUEST_CRASH_P1)
42#define HV_MSR_CRASH_P2		(HV_REGISTER_GUEST_CRASH_P2)
43#define HV_MSR_CRASH_P3		(HV_REGISTER_GUEST_CRASH_P3)
44#define HV_MSR_CRASH_P4		(HV_REGISTER_GUEST_CRASH_P4)
45#define HV_MSR_CRASH_CTL	(HV_REGISTER_GUEST_CRASH_CTL)
46
47#define HV_MSR_VP_INDEX		(HV_REGISTER_VP_INDEX)
48#define HV_MSR_TIME_REF_COUNT	(HV_REGISTER_TIME_REF_COUNT)
49#define HV_MSR_REFERENCE_TSC	(HV_REGISTER_REFERENCE_TSC)
50
51#define HV_MSR_SINT0		(HV_REGISTER_SINT0)
52#define HV_MSR_SCONTROL		(HV_REGISTER_SCONTROL)
53#define HV_MSR_SIEFP		(HV_REGISTER_SIEFP)
54#define HV_MSR_SIMP		(HV_REGISTER_SIMP)
55#define HV_MSR_EOM		(HV_REGISTER_EOM)
56
57#define HV_MSR_STIMER0_CONFIG	(HV_REGISTER_STIMER0_CONFIG)
58#define HV_MSR_STIMER0_COUNT	(HV_REGISTER_STIMER0_COUNT)
59
60union hv_msi_entry {
61	u64 as_uint64[2];
62	struct {
63		u64 address;
64		u32 data;
65		u32 reserved;
66	} __packed;
67};
68
69#include <asm-generic/hyperv-tlfs.h>
70
71#endif
72