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1767877a LE |
1 | /**@file\r |
2 | Functions related to the Firmware Volume Block service whose\r | |
3 | implementation is specific to the runtime DXE driver build.\r | |
4 | \r | |
5 | Copyright (C) 2015, Red Hat, Inc.\r | |
6 | Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r | |
7 | \r | |
b26f0cf9 | 8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
1767877a LE |
9 | **/\r |
10 | \r | |
11 | #include <Guid/EventGroup.h>\r | |
12 | #include <Library/DebugLib.h>\r | |
13 | #include <Library/DevicePathLib.h>\r | |
3b3d016b | 14 | #include <Library/DxeServicesTableLib.h>\r |
75b7aa95 | 15 | #include <Library/MemEncryptSevLib.h>\r |
b963ec49 | 16 | #include <Library/PcdLib.h>\r |
1767877a LE |
17 | #include <Library/UefiBootServicesTableLib.h>\r |
18 | #include <Library/UefiRuntimeLib.h>\r | |
19 | #include <Protocol/DevicePath.h>\r | |
20 | #include <Protocol/FirmwareVolumeBlock.h>\r | |
21 | \r | |
22 | #include "FwBlockService.h"\r | |
23 | #include "QemuFlash.h"\r | |
24 | \r | |
25 | VOID\r | |
26 | InstallProtocolInterfaces (\r | |
ac0a286f | 27 | IN EFI_FW_VOL_BLOCK_DEVICE *FvbDevice\r |
1767877a LE |
28 | )\r |
29 | {\r | |
ac0a286f MK |
30 | EFI_STATUS Status;\r |
31 | EFI_HANDLE FwbHandle;\r | |
32 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *OldFwbInterface;\r | |
1767877a | 33 | \r |
b963ec49 LE |
34 | ASSERT (!FeaturePcdGet (PcdSmmSmramRequire));\r |
35 | \r | |
1767877a LE |
36 | //\r |
37 | // Find a handle with a matching device path that has supports FW Block\r | |
38 | // protocol\r | |
39 | //\r | |
ac0a286f MK |
40 | Status = gBS->LocateDevicePath (\r |
41 | &gEfiFirmwareVolumeBlockProtocolGuid,\r | |
42 | &FvbDevice->DevicePath,\r | |
43 | &FwbHandle\r | |
44 | );\r | |
1767877a LE |
45 | if (EFI_ERROR (Status)) {\r |
46 | //\r | |
47 | // LocateDevicePath fails so install a new interface and device path\r | |
48 | //\r | |
49 | FwbHandle = NULL;\r | |
70d5086c | 50 | DEBUG ((DEBUG_INFO, "Installing QEMU flash FVB\n"));\r |
1767877a LE |
51 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
52 | &FwbHandle,\r | |
53 | &gEfiFirmwareVolumeBlockProtocolGuid,\r | |
54 | &FvbDevice->FwVolBlockInstance,\r | |
55 | &gEfiDevicePathProtocolGuid,\r | |
56 | FvbDevice->DevicePath,\r | |
57 | NULL\r | |
58 | );\r | |
59 | ASSERT_EFI_ERROR (Status);\r | |
60 | } else if (IsDevicePathEnd (FvbDevice->DevicePath)) {\r | |
61 | //\r | |
62 | // Device already exists, so reinstall the FVB protocol\r | |
63 | //\r | |
64 | Status = gBS->HandleProtocol (\r | |
65 | FwbHandle,\r | |
66 | &gEfiFirmwareVolumeBlockProtocolGuid,\r | |
ac0a286f | 67 | (VOID **)&OldFwbInterface\r |
1767877a LE |
68 | );\r |
69 | ASSERT_EFI_ERROR (Status);\r | |
70 | \r | |
70d5086c | 71 | DEBUG ((DEBUG_INFO, "Reinstalling FVB for QEMU flash region\n"));\r |
1767877a LE |
72 | Status = gBS->ReinstallProtocolInterface (\r |
73 | FwbHandle,\r | |
74 | &gEfiFirmwareVolumeBlockProtocolGuid,\r | |
75 | OldFwbInterface,\r | |
76 | &FvbDevice->FwVolBlockInstance\r | |
77 | );\r | |
78 | ASSERT_EFI_ERROR (Status);\r | |
79 | } else {\r | |
80 | //\r | |
81 | // There was a FVB protocol on an End Device Path node\r | |
82 | //\r | |
83 | ASSERT (FALSE);\r | |
84 | }\r | |
85 | }\r | |
86 | \r | |
1767877a LE |
87 | STATIC\r |
88 | VOID\r | |
89 | EFIAPI\r | |
90 | FvbVirtualAddressChangeEvent (\r | |
ac0a286f MK |
91 | IN EFI_EVENT Event,\r |
92 | IN VOID *Context\r | |
1767877a | 93 | )\r |
ac0a286f | 94 | \r |
1767877a LE |
95 | /*++\r |
96 | \r | |
97 | Routine Description:\r | |
98 | \r | |
99 | Fixup internal data so that EFI and SAL can be call in virtual mode.\r | |
100 | Call the passed in Child Notify event and convert the mFvbModuleGlobal\r | |
101 | date items to there virtual address.\r | |
102 | \r | |
103 | Arguments:\r | |
104 | \r | |
105 | (Standard EFI notify event - EFI_EVENT_NOTIFY)\r | |
106 | \r | |
107 | Returns:\r | |
108 | \r | |
109 | None\r | |
110 | \r | |
111 | --*/\r | |
112 | {\r | |
ac0a286f MK |
113 | EFI_FW_VOL_INSTANCE *FwhInstance;\r |
114 | UINTN Index;\r | |
1767877a LE |
115 | \r |
116 | FwhInstance = mFvbModuleGlobal->FvInstance;\r | |
ac0a286f | 117 | EfiConvertPointer (0x0, (VOID **)&mFvbModuleGlobal->FvInstance);\r |
1767877a LE |
118 | \r |
119 | //\r | |
120 | // Convert the base address of all the instances\r | |
121 | //\r | |
ac0a286f | 122 | Index = 0;\r |
1767877a | 123 | while (Index < mFvbModuleGlobal->NumFv) {\r |
ac0a286f | 124 | EfiConvertPointer (0x0, (VOID **)&FwhInstance->FvBase);\r |
1767877a | 125 | FwhInstance = (EFI_FW_VOL_INSTANCE *)\r |
ac0a286f MK |
126 | (\r |
127 | (UINTN)((UINT8 *)FwhInstance) +\r | |
128 | FwhInstance->VolumeHeader.HeaderLength +\r | |
129 | (sizeof (EFI_FW_VOL_INSTANCE) - sizeof (EFI_FIRMWARE_VOLUME_HEADER))\r | |
130 | );\r | |
1767877a LE |
131 | Index++;\r |
132 | }\r | |
133 | \r | |
ac0a286f | 134 | EfiConvertPointer (0x0, (VOID **)&mFvbModuleGlobal);\r |
1767877a LE |
135 | QemuFlashConvertPointers ();\r |
136 | }\r | |
137 | \r | |
1767877a LE |
138 | VOID\r |
139 | InstallVirtualAddressChangeHandler (\r | |
140 | VOID\r | |
141 | )\r | |
142 | {\r | |
ac0a286f MK |
143 | EFI_STATUS Status;\r |
144 | EFI_EVENT VirtualAddressChangeEvent;\r | |
1767877a LE |
145 | \r |
146 | Status = gBS->CreateEventEx (\r | |
147 | EVT_NOTIFY_SIGNAL,\r | |
148 | TPL_NOTIFY,\r | |
149 | FvbVirtualAddressChangeEvent,\r | |
150 | NULL,\r | |
151 | &gEfiEventVirtualAddressChangeGuid,\r | |
152 | &VirtualAddressChangeEvent\r | |
153 | );\r | |
154 | ASSERT_EFI_ERROR (Status);\r | |
155 | }\r | |
3b3d016b BS |
156 | \r |
157 | EFI_STATUS\r | |
158 | MarkIoMemoryRangeForRuntimeAccess (\r | |
ac0a286f MK |
159 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r |
160 | IN UINTN Length\r | |
3b3d016b BS |
161 | )\r |
162 | {\r | |
ac0a286f MK |
163 | EFI_STATUS Status;\r |
164 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor;\r | |
3b3d016b BS |
165 | \r |
166 | //\r | |
167 | // Mark flash region as runtime memory\r | |
168 | //\r | |
169 | Status = gDS->RemoveMemorySpace (\r | |
170 | BaseAddress,\r | |
171 | Length\r | |
172 | );\r | |
173 | \r | |
174 | Status = gDS->AddMemorySpace (\r | |
175 | EfiGcdMemoryTypeMemoryMappedIo,\r | |
176 | BaseAddress,\r | |
177 | Length,\r | |
178 | EFI_MEMORY_UC | EFI_MEMORY_RUNTIME\r | |
179 | );\r | |
180 | ASSERT_EFI_ERROR (Status);\r | |
181 | \r | |
182 | Status = gDS->AllocateMemorySpace (\r | |
183 | EfiGcdAllocateAddress,\r | |
184 | EfiGcdMemoryTypeMemoryMappedIo,\r | |
185 | 0,\r | |
186 | Length,\r | |
187 | &BaseAddress,\r | |
188 | gImageHandle,\r | |
189 | NULL\r | |
190 | );\r | |
191 | ASSERT_EFI_ERROR (Status);\r | |
192 | \r | |
193 | Status = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor);\r | |
194 | ASSERT_EFI_ERROR (Status);\r | |
195 | \r | |
196 | Status = gDS->SetMemorySpaceAttributes (\r | |
197 | BaseAddress,\r | |
198 | Length,\r | |
199 | GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME\r | |
200 | );\r | |
201 | ASSERT_EFI_ERROR (Status);\r | |
202 | \r | |
75b7aa95 BS |
203 | //\r |
204 | // When SEV is active, AmdSevDxe mapped the BaseAddress with C=0 but\r | |
205 | // SetMemorySpaceAttributes() remaps the range with C=1. Let's restore\r | |
206 | // the mapping so that both guest and hyervisor can access the flash\r | |
207 | // memory range.\r | |
208 | //\r | |
209 | if (MemEncryptSevIsEnabled ()) {\r | |
8ee4e52b | 210 | Status = MemEncryptSevClearMmioPageEncMask (\r |
75b7aa95 BS |
211 | 0,\r |
212 | BaseAddress,\r | |
8ee4e52b | 213 | EFI_SIZE_TO_PAGES (Length)\r |
75b7aa95 BS |
214 | );\r |
215 | ASSERT_EFI_ERROR (Status);\r | |
216 | }\r | |
217 | \r | |
3b3d016b BS |
218 | return Status;\r |
219 | }\r | |
cd99d07d LE |
220 | \r |
221 | VOID\r | |
222 | SetPcdFlashNvStorageBaseAddresses (\r | |
223 | VOID\r | |
224 | )\r | |
225 | {\r | |
ac0a286f | 226 | RETURN_STATUS PcdStatus;\r |
cd99d07d LE |
227 | \r |
228 | //\r | |
229 | // Set several PCD values to point to flash\r | |
230 | //\r | |
231 | PcdStatus = PcdSet64S (\r | |
ac0a286f MK |
232 | PcdFlashNvStorageVariableBase64,\r |
233 | (UINTN)PcdGet32 (PcdOvmfFlashNvStorageVariableBase)\r | |
234 | );\r | |
cd99d07d LE |
235 | ASSERT_RETURN_ERROR (PcdStatus);\r |
236 | PcdStatus = PcdSet32S (\r | |
ac0a286f MK |
237 | PcdFlashNvStorageFtwWorkingBase,\r |
238 | PcdGet32 (PcdOvmfFlashNvStorageFtwWorkingBase)\r | |
239 | );\r | |
cd99d07d LE |
240 | ASSERT_RETURN_ERROR (PcdStatus);\r |
241 | PcdStatus = PcdSet32S (\r | |
ac0a286f MK |
242 | PcdFlashNvStorageFtwSpareBase,\r |
243 | PcdGet32 (PcdOvmfFlashNvStorageFtwSpareBase)\r | |
244 | );\r | |
cd99d07d LE |
245 | ASSERT_RETURN_ERROR (PcdStatus);\r |
246 | }\r |