MdePkg/Library/TdxLib/TdxLibNull.c

   1 /** @file
   2
   3   Null stub of TdxLib
   4
   5   Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
   6   SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include <Uefi/UefiBaseType.h>
  11 #include <Library/TdxLib.h>
  12
  13 /**
  14   This function accepts a pending private page, and initialize the page to
  15   all-0 using the TD ephemeral private key.
  16
  17   @param[in]  StartAddress     Guest physical address of the private page
  18                                to accept.
  19   @param[in]  NumberOfPages    Number of the pages to be accepted.
  20   @param[in]  PageSize         GPA page size. Accept 1G/2M/4K page size.
  21
  22   @return EFI_SUCCESS
  23 **/
  24 EFI_STATUS
  25 EFIAPI
  26 TdAcceptPages (
  27   IN UINT64  StartAddress,
  28   IN UINT64  NumberOfPages,
  29   IN UINT32  PageSize
  30   )
  31 {
  32   return EFI_UNSUPPORTED;
  33 }
  34
  35 /**
  36   This function extends one of the RTMR measurement register
  37   in TDCS with the provided extension data in memory.
  38   RTMR extending supports SHA384 which length is 48 bytes.
  39
  40   @param[in]  Data      Point to the data to be extended
  41   @param[in]  DataLen   Length of the data. Must be 48
  42   @param[in]  Index     RTMR index
  43
  44   @return EFI_SUCCESS
  45   @return EFI_INVALID_PARAMETER
  46   @return EFI_DEVICE_ERROR
  47
  48 **/
  49 EFI_STATUS
  50 EFIAPI
  51 TdExtendRtmr (
  52   IN  UINT32  *Data,
  53   IN  UINT32  DataLen,
  54   IN  UINT8   Index
  55   )
  56 {
  57   return EFI_UNSUPPORTED;
  58 }
  59
  60 /**
  61   This function gets the Td guest shared page mask.
  62
  63   The guest indicates if a page is shared using the Guest Physical Address
  64   (GPA) Shared (S) bit. If the GPA Width(GPAW) is 48, the S-bit is bit-47.
  65   If the GPAW is 52, the S-bit is bit-51.
  66
  67   @return Shared page bit mask
  68 **/
  69 UINT64
  70 EFIAPI
  71 TdSharedPageMask (
  72   VOID
  73   )
  74 {
  75   return 0;
  76 }
  77
  78 /**
  79   This function gets the maximum number of Virtual CPUs that are usable for
  80   Td Guest.
  81
  82   @return maximum Virtual CPUs number
  83 **/
  84 UINT32
  85 EFIAPI
  86 TdMaxVCpuNum (
  87   VOID
  88   )
  89 {
  90   return 0;
  91 }
  92
  93 /**
  94   This function gets the number of Virtual CPUs that are usable for Td
  95   Guest.
  96
  97   @return Virtual CPUs number
  98 **/
  99 UINT32
 100 EFIAPI
 101 TdVCpuNum (
 102   VOID
 103   )
 104 {
 105   return 0;
 106 }