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
|
/** @file
OVMF ACPI Cloud Hypervisor support
Copyright (c) 2021, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <IndustryStandard/Acpi.h> // EFI_ACPI_DESCRIPTION_HEADER
#include <IndustryStandard/CloudHv.h> // CLOUDHV_RSDP_ADDRESS
#include <IndustryStandard/Xen/arch-x86/hvm/start_info.h> // hvm_start_info
#include <Library/BaseLib.h> // CpuDeadLoop()
#include <Library/DebugLib.h> // DEBUG()
#include <Library/PcdLib.h> // PcdGet32()
#include <Library/HobLib.h> // GetFirstGuidHob(), GetNextGuidHob()
#include <Library/UefiBootServicesTableLib.h> // gBS
#include <Protocol/AcpiSystemDescriptionTable.h>
#include <Protocol/AcpiTable.h>
#include "AcpiPlatform.h"
EFI_STATUS
EFIAPI
InstallCloudHvTablesTdx (
IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol
)
{
EFI_STATUS Status;
UINTN TableHandle;
EFI_HANDLE ChAcpiHandle;
EFI_PEI_HOB_POINTERS Hob;
EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;
EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;
DsdtTable = NULL;
TableHandle = 0;
Hob.Guid = (EFI_HOB_GUID_TYPE *)GetFirstGuidHob (&gUefiOvmfPkgTdxAcpiHobGuid);
while (Hob.Guid != NULL) {
CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *)(&Hob.Guid->Name + 1);
if (!AsciiStrnCmp ((CHAR8 *)&CurrentTable->Signature, "DSDT", 4)) {
DsdtTable = CurrentTable;
} else {
//
// Install the tables
//
Status = AcpiProtocol->InstallAcpiTable (
AcpiProtocol,
CurrentTable,
CurrentTable->Length,
&TableHandle
);
for (UINTN i = 0; i < CurrentTable->Length; i++) {
DEBUG ((DEBUG_INFO, " %x", *((UINT8 *)CurrentTable + i)));
}
DEBUG ((DEBUG_INFO, "\n"));
}
Hob.Raw = GET_NEXT_HOB (Hob.Raw);
Hob.Guid = (EFI_HOB_GUID_TYPE *)GetNextGuidHob (&gUefiOvmfPkgTdxAcpiHobGuid, Hob.Raw);
}
//
// Install DSDT table. If we reached this point without finding the DSDT,
// then we're out of sync with the hypervisor, and cannot continue.
//
if (DsdtTable == NULL) {
DEBUG ((DEBUG_INFO, "%a: no DSDT found\n", __FUNCTION__));
ASSERT (FALSE);
}
Status = AcpiProtocol->InstallAcpiTable (
AcpiProtocol,
DsdtTable,
DsdtTable->Length,
&TableHandle
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// Install a protocol to notify that the ACPI table provided by CH is
// ready.
//
ChAcpiHandle = NULL;
Status = gBS->InstallProtocolInterface (
&ChAcpiHandle,
&gQemuAcpiTableNotifyProtocolGuid,
EFI_NATIVE_INTERFACE,
NULL
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
return EFI_SUCCESS;
}
// Get the ACPI tables from EBDA start
EFI_STATUS
EFIAPI
InstallCloudHvTables (
IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol
)
{
EFI_STATUS Status;
UINTN TableHandle;
EFI_ACPI_DESCRIPTION_HEADER *Xsdt;
VOID *CurrentTableEntry;
UINTN CurrentTablePointer;
EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;
UINTN Index;
UINTN NumberOfTableEntries;
EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt2Table;
EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;
EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *AcpiRsdpStructurePtr;
UINT32 *PVHResetVectorData;
struct hvm_start_info *pvh_start_info;
Fadt2Table = NULL;
DsdtTable = NULL;
TableHandle = 0;
NumberOfTableEntries = 0;
AcpiRsdpStructurePtr = NULL;
PVHResetVectorData = NULL;
pvh_start_info = NULL;
PVHResetVectorData = (VOID *)(UINTN)PcdGet32 (PcdXenPvhStartOfDayStructPtr);
if (PVHResetVectorData == 0) {
return EFI_NOT_FOUND;
}
pvh_start_info = (struct hvm_start_info *)(UINTN)PVHResetVectorData[0];
AcpiRsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)(UINTN)pvh_start_info->rsdp_paddr;
// If XSDT table is found, just install its tables.
// Otherwise, try to find and install the RSDT tables.
//
if (AcpiRsdpStructurePtr->XsdtAddress) {
//
// Retrieve the addresses of XSDT and
// calculate the number of its table entries.
//
Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *)(UINTN)
AcpiRsdpStructurePtr->XsdtAddress;
NumberOfTableEntries = (Xsdt->Length -
sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /
sizeof (UINT64);
//
// Install ACPI tables found in XSDT.
//
for (Index = 0; Index < NumberOfTableEntries; Index++) {
//
// Get the table entry from XSDT
//
CurrentTableEntry = (VOID *)((UINT8 *)Xsdt +
sizeof (EFI_ACPI_DESCRIPTION_HEADER) +
Index * sizeof (UINT64));
CurrentTablePointer = (UINTN)*(UINT64 *)CurrentTableEntry;
CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *)CurrentTablePointer;
//
// Install the XSDT tables
//
Status = AcpiProtocol->InstallAcpiTable (
AcpiProtocol,
CurrentTable,
CurrentTable->Length,
&TableHandle
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// Get the X-DSDT table address from the table FADT
//
if (!AsciiStrnCmp ((CHAR8 *)&CurrentTable->Signature, "FACP", 4)) {
Fadt2Table = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)
(UINTN)CurrentTablePointer;
DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *)(UINTN)Fadt2Table->XDsdt;
}
}
} else {
return EFI_NOT_FOUND;
}
//
// Install DSDT table. If we reached this point without finding the DSDT,
// then we're out of sync with the hypervisor, and cannot continue.
//
if (DsdtTable == NULL) {
DEBUG ((DEBUG_ERROR, "%a: no DSDT found\n", __FUNCTION__));
ASSERT (FALSE);
CpuDeadLoop ();
}
Status = AcpiProtocol->InstallAcpiTable (
AcpiProtocol,
DsdtTable,
DsdtTable->Length,
&TableHandle
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
return EFI_SUCCESS;
}
|
