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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
/** @file
The module entry point for Tcg2 configuration module.
Copyright (c) 2015 - 2024, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <Guid/TpmInstance.h>
#include <Guid/Tcg2AcpiCommunicateBuffer.h>
#include <Guid/TpmNvsMm.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PcdLib.h>
#include <Library/HobLib.h>
#include <Library/MmUnblockMemoryLib.h>
#include <Ppi/ReadOnlyVariable2.h>
#include <Ppi/TpmInitialized.h>
#include <Protocol/Tcg2Protocol.h>
#include "Tcg2ConfigNvData.h"
#include "Tcg2Internal.h"
TPM_INSTANCE_ID mTpmInstanceId[] = TPM_INSTANCE_ID_LIST;
CONST EFI_PEI_PPI_DESCRIPTOR gTpmSelectedPpi = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiTpmDeviceSelectedGuid,
NULL
};
EFI_PEI_PPI_DESCRIPTOR mTpmInitializationDonePpiList = {
EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
&gPeiTpmInitializationDonePpiGuid,
NULL
};
/**
This routine check both SetupVariable and real TPM device, and return final TpmDevice configuration.
@param SetupTpmDevice TpmDevice configuration in setup driver
@return TpmDevice configuration
**/
UINT8
DetectTpmDevice (
IN UINT8 SetupTpmDevice
);
/**
Build gEdkiiTcg2AcpiCommunicateBufferHobGuid.
@param[in] PeiServices General purpose services available to every PEIM.
@param[in] NotifyDescriptor The notification structure this PEIM registered on install.
@param[in] Ppi The memory discovered PPI. Not used.
@retval EFI_SUCCESS The function completed successfully.
@retval others Failed to build Tcg2AcpiCommunicateBuffer Hob.
**/
EFI_STATUS
EFIAPI
BuildTcg2AcpiCommunicateBufferHob (
IN EFI_PEI_SERVICES **PeiServices,
IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
IN VOID *Ppi
)
{
TCG2_ACPI_COMMUNICATE_BUFFER *Tcg2AcpiCommunicateBufferHob;
EFI_STATUS Status;
VOID *Buffer;
UINTN Pages;
Pages = sizeof (TCG_NVS);
Buffer = AllocateRuntimePages (Pages);
ASSERT (Buffer != NULL);
Status = MmUnblockMemoryRequest ((UINTN)Buffer, Pages);
if ((Status != EFI_UNSUPPORTED) && EFI_ERROR (Status)) {
return Status;
}
Tcg2AcpiCommunicateBufferHob = BuildGuidHob (&gEdkiiTcg2AcpiCommunicateBufferHobGuid, sizeof (TCG2_ACPI_COMMUNICATE_BUFFER));
ASSERT (Tcg2AcpiCommunicateBufferHob != NULL);
Tcg2AcpiCommunicateBufferHob->Tcg2AcpiCommunicateBuffer = (UINTN)Buffer;
Tcg2AcpiCommunicateBufferHob->Pages = Pages;
return EFI_SUCCESS;
}
EFI_PEI_NOTIFY_DESCRIPTOR mPostMemNotifyList = {
(EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiPeiMemoryDiscoveredPpiGuid,
BuildTcg2AcpiCommunicateBufferHob
};
/**
The entry point for Tcg2 configuration driver.
@param FileHandle Handle of the file being invoked.
@param PeiServices Describes the list of possible PEI Services.
@retval EFI_SUCCESS Convert variable to PCD successfully.
@retval Others Fail to convert variable to PCD.
**/
EFI_STATUS
EFIAPI
Tcg2ConfigPeimEntryPoint (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
UINTN Size;
EFI_STATUS Status;
EFI_STATUS Status2;
EFI_PEI_READ_ONLY_VARIABLE2_PPI *VariablePpi;
TCG2_CONFIGURATION Tcg2Configuration;
UINTN Index;
UINT8 TpmDevice;
VOID *Hob;
Status = PeiServicesLocatePpi (&gEfiPeiReadOnlyVariable2PpiGuid, 0, NULL, (VOID **)&VariablePpi);
ASSERT_EFI_ERROR (Status);
Size = sizeof (Tcg2Configuration);
Status = VariablePpi->GetVariable (
VariablePpi,
TCG2_STORAGE_NAME,
&gTcg2ConfigFormSetGuid,
NULL,
&Size,
&Tcg2Configuration
);
if (EFI_ERROR (Status)) {
//
// Variable not ready, set default value
//
Tcg2Configuration.TpmDevice = TPM_DEVICE_DEFAULT;
}
//
// Validation
//
if ((Tcg2Configuration.TpmDevice > TPM_DEVICE_MAX) || (Tcg2Configuration.TpmDevice < TPM_DEVICE_MIN)) {
Tcg2Configuration.TpmDevice = TPM_DEVICE_DEFAULT;
}
//
// Although we have SetupVariable info, we still need detect TPM device manually.
//
DEBUG ((DEBUG_INFO, "Tcg2Configuration.TpmDevice from Setup: %x\n", Tcg2Configuration.TpmDevice));
if (PcdGetBool (PcdTpmAutoDetection)) {
TpmDevice = DetectTpmDevice (Tcg2Configuration.TpmDevice);
DEBUG ((DEBUG_INFO, "TpmDevice final: %x\n", TpmDevice));
if (TpmDevice != TPM_DEVICE_NULL) {
Tcg2Configuration.TpmDevice = TpmDevice;
}
} else {
TpmDevice = Tcg2Configuration.TpmDevice;
}
//
// Convert variable to PCD.
// This is work-around because there is no guarantee DynamicHiiPcd can return correct value in DXE phase.
// Using DynamicPcd instead.
//
// NOTE: Tcg2Configuration variable contains the desired TpmDevice type,
// while PcdTpmInstanceGuid PCD contains the real detected TpmDevice type
//
for (Index = 0; Index < sizeof (mTpmInstanceId)/sizeof (mTpmInstanceId[0]); Index++) {
if (TpmDevice == mTpmInstanceId[Index].TpmDevice) {
Size = sizeof (mTpmInstanceId[Index].TpmInstanceGuid);
Status = PcdSetPtrS (PcdTpmInstanceGuid, &Size, &mTpmInstanceId[Index].TpmInstanceGuid);
ASSERT_EFI_ERROR (Status);
DEBUG ((DEBUG_INFO, "TpmDevice PCD: %g\n", &mTpmInstanceId[Index].TpmInstanceGuid));
break;
}
}
//
// Build Hob for PcdTpmInstanceGuid
//
Hob = BuildGuidDataHob (
&gEdkiiTpmInstanceHobGuid,
(VOID *)PcdGetPtr (PcdTpmInstanceGuid),
sizeof (EFI_GUID)
);
ASSERT (Hob != NULL);
//
// Build Hob for PcdTcgPhysicalPresenceInterfaceVer
//
Hob = BuildGuidDataHob (
&gEdkiiTcgPhysicalPresenceInterfaceVerHobGuid,
(VOID *)PcdGetPtr (PcdTcgPhysicalPresenceInterfaceVer),
AsciiStrSize ((CHAR8 *)PcdGetPtr (PcdTcgPhysicalPresenceInterfaceVer))
);
ASSERT (Hob != NULL);
PeiServicesNotifyPpi (&mPostMemNotifyList);
//
// Selection done
//
Status = PeiServicesInstallPpi (&gTpmSelectedPpi);
ASSERT_EFI_ERROR (Status);
//
// Even if no TPM is selected or detected, we still need install TpmInitializationDonePpi.
// Because TcgPei or Tcg2Pei will not run, but we still need a way to notify other driver.
// Other driver can know TPM initialization state by TpmInitializedPpi.
//
if (CompareGuid (PcdGetPtr (PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceNoneGuid)) {
Status2 = PeiServicesInstallPpi (&mTpmInitializationDonePpiList);
ASSERT_EFI_ERROR (Status2);
}
return Status;
}
|
