init

hc

2024-03-22 a0752693d998599af469473b8dc239ef973a012f

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
/** @file 
 
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR> 
SPDX-License-Identifier: BSD-2-Clause-Patent 
 
**/ 
 
#include <Uefi.h> 
#include <PiDxe.h> 
#include <Library/TestPointCheckLib.h> 
#include <Library/TestPointLib.h> 
#include <Library/DebugLib.h> 
#include <Library/UefiBootServicesTableLib.h> 
#include <Library/MemoryAllocationLib.h> 
#include <Protocol/SmmAccess2.h> 
 
CHAR8 *mSmramStateName[] = { 
  "Open", 
  "Closed", 
  "Locked", 
  "Cacheable", 
  "Allocated", 
  "NeedTest", 
  "NeedEccInit", 
}; 
 
VOID 
DumpSmramDescriptor ( 
  IN UINTN                 NumberOfSmmReservedRegions, 
  IN EFI_SMRAM_DESCRIPTOR  *Descriptor 
  ) 
{ 
  UINTN                                 Index; 
  UINTN                                 BitIndex; 
 
  for (Index = 0; Index < NumberOfSmmReservedRegions; Index++) { 
    DEBUG ((DEBUG_INFO, 
      "  BA=%016lx (A=%016lx) L=%016lx  State=%016lx", 
      Descriptor[Index].PhysicalStart, 
      Descriptor[Index].CpuStart, 
      Descriptor[Index].PhysicalSize, 
      Descriptor[Index].RegionState 
      )); 
    DEBUG ((DEBUG_INFO, "  (")); 
    for (BitIndex = 0; BitIndex < sizeof(mSmramStateName)/sizeof(mSmramStateName[0]); BitIndex++) { 
      if ((Descriptor[Index].RegionState & LShiftU64 (1, BitIndex)) != 0) { 
        DEBUG ((DEBUG_INFO, mSmramStateName[BitIndex])); 
        DEBUG ((DEBUG_INFO, ",")); 
      } 
    } 
    DEBUG ((DEBUG_INFO, ")\n")); 
  } 
} 
 
EFI_STATUS 
CheckSmramDescriptor ( 
  IN UINTN                 NumberOfSmmReservedRegions, 
  IN EFI_SMRAM_DESCRIPTOR  *Descriptor 
  ) 
{ 
  UINTN   Index; 
  UINTN   Index2; 
  UINT64  Length; 
  BOOLEAN AdjacentRegion; 
 
  Length = 0; 
  for (Index = 0; Index < NumberOfSmmReservedRegions; Index++) { 
    AdjacentRegion = FALSE; 
    for (Index2 = 0; Index2 < NumberOfSmmReservedRegions; Index2++) { 
      if ((NumberOfSmmReservedRegions == 1) 
          || (Descriptor[Index].PhysicalStart + Descriptor[Index].PhysicalSize == Descriptor[Index2].PhysicalStart) 
          || (Descriptor[Index2].PhysicalStart + Descriptor[Index2].PhysicalSize == Descriptor[Index].PhysicalStart)) { 
        AdjacentRegion = TRUE; 
        break; 
      } 
    } 
 
    if (AdjacentRegion == TRUE) { 
      Length += Descriptor[Index].PhysicalSize; 
    } else { 
      DEBUG ((DEBUG_ERROR, "Smram is not adjacent\n")); 
      TestPointLibAppendErrorString ( 
        PLATFORM_TEST_POINT_ROLE_PLATFORM_IBV, 
        NULL, 
        TEST_POINT_BYTE7_DXE_SMM_READY_TO_LOCK_SMRAM_ALIGNED_ERROR_CODE \ 
          TEST_POINT_DXE_SMM_READY_TO_LOCK 
          TEST_POINT_BYTE7_DXE_SMM_READY_TO_LOCK_SMRAM_ALIGNED_ERROR_STRING 
        ); 
      return EFI_INVALID_PARAMETER; 
    } 
  } 
 
  if (Length != GetPowerOfTwo64 (Length)) { 
    DEBUG ((DEBUG_ERROR, "Smram is not aligned\n")); 
    TestPointLibAppendErrorString ( 
      PLATFORM_TEST_POINT_ROLE_PLATFORM_IBV, 
      NULL, 
      TEST_POINT_BYTE7_DXE_SMM_READY_TO_LOCK_SMRAM_ALIGNED_ERROR_CODE \ 
        TEST_POINT_DXE_SMM_READY_TO_LOCK 
        TEST_POINT_BYTE7_DXE_SMM_READY_TO_LOCK_SMRAM_ALIGNED_ERROR_STRING 
      ); 
    return EFI_INVALID_PARAMETER; 
  } 
  return EFI_SUCCESS; 
} 
 
EFI_STATUS 
TestPointCheckSmmInfo ( 
  VOID 
  ) 
{ 
  EFI_STATUS               Status; 
  EFI_SMM_ACCESS2_PROTOCOL *SmmAccess; 
  UINTN                    Size; 
  EFI_SMRAM_DESCRIPTOR     *SmramRanges; 
 
  DEBUG ((DEBUG_INFO, "==== TestPointCheckSmmInfo - Enter\n")); 
 
  Status = gBS->LocateProtocol (&gEfiSmmAccess2ProtocolGuid, NULL, (VOID **)&SmmAccess); 
  if (EFI_ERROR (Status)) { 
    goto Done ; 
  } 
 
  Size = 0; 
  Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL); 
  ASSERT (Status == EFI_BUFFER_TOO_SMALL); 
 
  SmramRanges = (EFI_SMRAM_DESCRIPTOR *) AllocateZeroPool (Size); 
  ASSERT (SmramRanges != NULL); 
 
  Status = SmmAccess->GetCapabilities (SmmAccess, &Size, SmramRanges); 
  ASSERT_EFI_ERROR (Status); 
 
  DEBUG ((DEBUG_INFO, "SMRAM Info\n")); 
  DumpSmramDescriptor (Size / sizeof (EFI_SMRAM_DESCRIPTOR), SmramRanges); 
 
  Status = CheckSmramDescriptor (Size / sizeof (EFI_SMRAM_DESCRIPTOR), SmramRanges); 
 
  FreePool (SmramRanges); 
 
Done: 
  DEBUG ((DEBUG_INFO, "==== TestPointCheckSmmInfo - Exit\n")); 
 
  return Status; 
}