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 60 union 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