arch/arm64/include/asm/hyperv-tlfs.h

   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