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7594c5bf SB |
1 | /** @file\r |
2 | OVMF ACPI Cloud Hypervisor support\r | |
3 | \r | |
4 | Copyright (c) 2021, Intel Corporation. All rights reserved.\r | |
5 | \r | |
6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
7 | \r | |
8 | **/\r | |
9 | \r | |
e254c71e | 10 | #include <IndustryStandard/Acpi.h> // EFI_ACPI_DESCRIPTION_HEADER\r |
d50d9e55 SB |
11 | #include <IndustryStandard/CloudHv.h> // CLOUDHV_RSDP_ADDRESS\r |
12 | #include <IndustryStandard/Xen/arch-x86/hvm/start_info.h> // hvm_start_info\r | |
13 | #include <Library/BaseLib.h> // CpuDeadLoop()\r | |
14 | #include <Library/DebugLib.h> // DEBUG()\r | |
15 | #include <Library/PcdLib.h> // PcdGet32()\r | |
e254c71e SB |
16 | #include <Library/HobLib.h> // GetFirstGuidHob(), GetNextGuidHob()\r |
17 | #include <Library/UefiBootServicesTableLib.h> // gBS\r | |
e254c71e SB |
18 | #include <Protocol/AcpiSystemDescriptionTable.h>\r |
19 | #include <Protocol/AcpiTable.h>\r | |
7594c5bf SB |
20 | \r |
21 | #include "AcpiPlatform.h"\r | |
22 | \r | |
e254c71e SB |
23 | EFI_STATUS\r |
24 | EFIAPI\r | |
25 | InstallCloudHvTablesTdx (\r | |
26 | IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol\r | |
27 | )\r | |
28 | {\r | |
29 | EFI_STATUS Status;\r | |
30 | UINTN TableHandle;\r | |
f81273f7 | 31 | EFI_HANDLE ChAcpiHandle;\r |
e254c71e SB |
32 | \r |
33 | EFI_PEI_HOB_POINTERS Hob;\r | |
34 | EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;\r | |
35 | EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;\r | |
36 | \r | |
37 | DsdtTable = NULL;\r | |
38 | TableHandle = 0;\r | |
39 | \r | |
40 | Hob.Guid = (EFI_HOB_GUID_TYPE *)GetFirstGuidHob (&gUefiOvmfPkgTdxAcpiHobGuid);\r | |
41 | \r | |
42 | while (Hob.Guid != NULL) {\r | |
43 | CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *)(&Hob.Guid->Name + 1);\r | |
44 | if (!AsciiStrnCmp ((CHAR8 *)&CurrentTable->Signature, "DSDT", 4)) {\r | |
45 | DsdtTable = CurrentTable;\r | |
46 | } else {\r | |
47 | //\r | |
48 | // Install the tables\r | |
49 | //\r | |
50 | Status = AcpiProtocol->InstallAcpiTable (\r | |
51 | AcpiProtocol,\r | |
52 | CurrentTable,\r | |
53 | CurrentTable->Length,\r | |
54 | &TableHandle\r | |
55 | );\r | |
56 | for (UINTN i = 0; i < CurrentTable->Length; i++) {\r | |
57 | DEBUG ((DEBUG_INFO, " %x", *((UINT8 *)CurrentTable + i)));\r | |
58 | }\r | |
59 | \r | |
60 | DEBUG ((DEBUG_INFO, "\n"));\r | |
61 | }\r | |
62 | \r | |
63 | Hob.Raw = GET_NEXT_HOB (Hob.Raw);\r | |
64 | Hob.Guid = (EFI_HOB_GUID_TYPE *)GetNextGuidHob (&gUefiOvmfPkgTdxAcpiHobGuid, Hob.Raw);\r | |
65 | }\r | |
66 | \r | |
67 | //\r | |
68 | // Install DSDT table. If we reached this point without finding the DSDT,\r | |
69 | // then we're out of sync with the hypervisor, and cannot continue.\r | |
70 | //\r | |
71 | if (DsdtTable == NULL) {\r | |
72 | DEBUG ((DEBUG_INFO, "%a: no DSDT found\n", __FUNCTION__));\r | |
73 | ASSERT (FALSE);\r | |
74 | }\r | |
75 | \r | |
76 | Status = AcpiProtocol->InstallAcpiTable (\r | |
77 | AcpiProtocol,\r | |
78 | DsdtTable,\r | |
79 | DsdtTable->Length,\r | |
80 | &TableHandle\r | |
81 | );\r | |
82 | if (EFI_ERROR (Status)) {\r | |
83 | ASSERT_EFI_ERROR (Status);\r | |
84 | return Status;\r | |
85 | }\r | |
86 | \r | |
87 | //\r | |
88 | // Install a protocol to notify that the ACPI table provided by CH is\r | |
89 | // ready.\r | |
90 | //\r | |
f81273f7 | 91 | ChAcpiHandle = NULL;\r |
7cd55f30 MX |
92 | Status = gBS->InstallProtocolInterface (\r |
93 | &ChAcpiHandle,\r | |
94 | &gQemuAcpiTableNotifyProtocolGuid,\r | |
95 | EFI_NATIVE_INTERFACE,\r | |
96 | NULL\r | |
97 | );\r | |
98 | if (EFI_ERROR (Status)) {\r | |
99 | ASSERT_EFI_ERROR (Status);\r | |
100 | return Status;\r | |
101 | }\r | |
e254c71e SB |
102 | \r |
103 | return EFI_SUCCESS;\r | |
104 | }\r | |
105 | \r | |
7594c5bf SB |
106 | // Get the ACPI tables from EBDA start\r |
107 | EFI_STATUS\r | |
108 | EFIAPI\r | |
109 | InstallCloudHvTables (\r | |
110 | IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol\r | |
111 | )\r | |
112 | {\r | |
113 | EFI_STATUS Status;\r | |
114 | UINTN TableHandle;\r | |
115 | \r | |
d50d9e55 SB |
116 | EFI_ACPI_DESCRIPTION_HEADER *Xsdt;\r |
117 | VOID *CurrentTableEntry;\r | |
118 | UINTN CurrentTablePointer;\r | |
119 | EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;\r | |
120 | UINTN Index;\r | |
121 | UINTN NumberOfTableEntries;\r | |
122 | EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt2Table;\r | |
123 | EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;\r | |
124 | EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *AcpiRsdpStructurePtr;\r | |
125 | UINT32 *PVHResetVectorData;\r | |
126 | struct hvm_start_info *pvh_start_info;\r | |
7594c5bf SB |
127 | \r |
128 | Fadt2Table = NULL;\r | |
129 | DsdtTable = NULL;\r | |
130 | TableHandle = 0;\r | |
131 | NumberOfTableEntries = 0;\r | |
d50d9e55 SB |
132 | AcpiRsdpStructurePtr = NULL;\r |
133 | PVHResetVectorData = NULL;\r | |
134 | pvh_start_info = NULL;\r | |
135 | \r | |
136 | PVHResetVectorData = (VOID *)(UINTN)PcdGet32 (PcdXenPvhStartOfDayStructPtr);\r | |
137 | if (PVHResetVectorData == 0) {\r | |
138 | return EFI_NOT_FOUND;\r | |
139 | }\r | |
140 | \r | |
141 | pvh_start_info = (struct hvm_start_info *)(UINTN)PVHResetVectorData[0];\r | |
142 | AcpiRsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)(UINTN)pvh_start_info->rsdp_paddr;\r | |
7594c5bf SB |
143 | \r |
144 | // If XSDT table is found, just install its tables.\r | |
145 | // Otherwise, try to find and install the RSDT tables.\r | |
146 | //\r | |
147 | if (AcpiRsdpStructurePtr->XsdtAddress) {\r | |
148 | //\r | |
149 | // Retrieve the addresses of XSDT and\r | |
150 | // calculate the number of its table entries.\r | |
151 | //\r | |
152 | Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *)(UINTN)\r | |
153 | AcpiRsdpStructurePtr->XsdtAddress;\r | |
154 | NumberOfTableEntries = (Xsdt->Length -\r | |
155 | sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /\r | |
156 | sizeof (UINT64);\r | |
157 | \r | |
158 | //\r | |
159 | // Install ACPI tables found in XSDT.\r | |
160 | //\r | |
161 | for (Index = 0; Index < NumberOfTableEntries; Index++) {\r | |
162 | //\r | |
163 | // Get the table entry from XSDT\r | |
164 | //\r | |
165 | CurrentTableEntry = (VOID *)((UINT8 *)Xsdt +\r | |
166 | sizeof (EFI_ACPI_DESCRIPTION_HEADER) +\r | |
167 | Index * sizeof (UINT64));\r | |
168 | CurrentTablePointer = (UINTN)*(UINT64 *)CurrentTableEntry;\r | |
169 | CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *)CurrentTablePointer;\r | |
170 | \r | |
171 | //\r | |
172 | // Install the XSDT tables\r | |
173 | //\r | |
174 | Status = AcpiProtocol->InstallAcpiTable (\r | |
175 | AcpiProtocol,\r | |
176 | CurrentTable,\r | |
177 | CurrentTable->Length,\r | |
178 | &TableHandle\r | |
179 | );\r | |
180 | \r | |
181 | if (EFI_ERROR (Status)) {\r | |
182 | ASSERT_EFI_ERROR (Status);\r | |
183 | return Status;\r | |
184 | }\r | |
185 | \r | |
186 | //\r | |
187 | // Get the X-DSDT table address from the table FADT\r | |
188 | //\r | |
189 | if (!AsciiStrnCmp ((CHAR8 *)&CurrentTable->Signature, "FACP", 4)) {\r | |
190 | Fadt2Table = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)\r | |
191 | (UINTN)CurrentTablePointer;\r | |
192 | DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *)(UINTN)Fadt2Table->XDsdt;\r | |
193 | }\r | |
194 | }\r | |
195 | } else {\r | |
196 | return EFI_NOT_FOUND;\r | |
197 | }\r | |
198 | \r | |
199 | //\r | |
200 | // Install DSDT table. If we reached this point without finding the DSDT,\r | |
201 | // then we're out of sync with the hypervisor, and cannot continue.\r | |
202 | //\r | |
203 | if (DsdtTable == NULL) {\r | |
204 | DEBUG ((DEBUG_ERROR, "%a: no DSDT found\n", __FUNCTION__));\r | |
205 | ASSERT (FALSE);\r | |
206 | CpuDeadLoop ();\r | |
207 | }\r | |
208 | \r | |
209 | Status = AcpiProtocol->InstallAcpiTable (\r | |
210 | AcpiProtocol,\r | |
211 | DsdtTable,\r | |
212 | DsdtTable->Length,\r | |
213 | &TableHandle\r | |
214 | );\r | |
215 | if (EFI_ERROR (Status)) {\r | |
216 | ASSERT_EFI_ERROR (Status);\r | |
217 | return Status;\r | |
218 | }\r | |
219 | \r | |
220 | return EFI_SUCCESS;\r | |
221 | }\r |