]>
Commit | Line | Data |
---|---|---|
3b96221f AP |
1 | /**@file\r |
2 | Xen Platform PEI support\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r | |
5 | Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>\r | |
6 | Copyright (c) 2019, Citrix Systems, Inc.\r | |
7 | \r | |
8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
9 | \r | |
10 | **/\r | |
11 | \r | |
12 | //\r | |
13 | // The package level header files this module uses\r | |
14 | //\r | |
15 | #include <PiPei.h>\r | |
16 | \r | |
17 | //\r | |
18 | // The Library classes this module consumes\r | |
19 | //\r | |
20 | #include <Library/DebugLib.h>\r | |
21 | #include <Library/HobLib.h>\r | |
22 | #include <Library/MemoryAllocationLib.h>\r | |
23 | #include <Library/PcdLib.h>\r | |
24 | #include <Guid/XenInfo.h>\r | |
25 | #include <IndustryStandard/E820.h>\r | |
26 | #include <Library/ResourcePublicationLib.h>\r | |
27 | #include <Library/MtrrLib.h>\r | |
60d26545 | 28 | #include <IndustryStandard/Xen/arch-x86/hvm/start_info.h>\r |
80b619d5 | 29 | #include <Library/XenHypercallLib.h>\r |
3b96221f AP |
30 | \r |
31 | #include "Platform.h"\r | |
32 | #include "Xen.h"\r | |
33 | \r | |
34 | STATIC UINT32 mXenLeaf = 0;\r | |
35 | \r | |
36 | EFI_XEN_INFO mXenInfo;\r | |
37 | \r | |
8651e1ce AP |
38 | //\r |
39 | // Location of the firmware info struct setup by hvmloader.\r | |
40 | // Only the E820 table is used by OVMF.\r | |
41 | //\r | |
42 | EFI_XEN_OVMF_INFO *mXenHvmloaderInfo;\r | |
43 | \r | |
3b96221f AP |
44 | /**\r |
45 | Returns E820 map provided by Xen\r | |
46 | \r | |
47 | @param Entries Pointer to E820 map\r | |
48 | @param Count Number of entries\r | |
49 | \r | |
50 | @return EFI_STATUS\r | |
51 | **/\r | |
52 | EFI_STATUS\r | |
53 | XenGetE820Map (\r | |
54 | EFI_E820_ENTRY64 **Entries,\r | |
55 | UINT32 *Count\r | |
56 | )\r | |
57 | {\r | |
594b5002 AP |
58 | //\r |
59 | // Get E820 produced by hvmloader\r | |
60 | //\r | |
61 | if (mXenHvmloaderInfo != NULL) {\r | |
62 | ASSERT (mXenHvmloaderInfo->E820 < MAX_ADDRESS);\r | |
63 | *Entries = (EFI_E820_ENTRY64 *)(UINTN) mXenHvmloaderInfo->E820;\r | |
64 | *Count = mXenHvmloaderInfo->E820EntriesCount;\r | |
65 | \r | |
66 | return EFI_SUCCESS;\r | |
3b96221f AP |
67 | }\r |
68 | \r | |
594b5002 | 69 | return EFI_NOT_FOUND;\r |
3b96221f AP |
70 | }\r |
71 | \r | |
72 | /**\r | |
73 | Connects to the Hypervisor.\r | |
74 | \r | |
3b96221f AP |
75 | @return EFI_STATUS\r |
76 | \r | |
77 | **/\r | |
78 | EFI_STATUS\r | |
79 | XenConnect (\r | |
3b96221f AP |
80 | )\r |
81 | {\r | |
82 | UINT32 Index;\r | |
83 | UINT32 TransferReg;\r | |
84 | UINT32 TransferPages;\r | |
85 | UINT32 XenVersion;\r | |
8651e1ce AP |
86 | EFI_XEN_OVMF_INFO *Info;\r |
87 | CHAR8 Sig[sizeof (Info->Signature) + 1];\r | |
60d26545 | 88 | UINT32 *PVHResetVectorData;\r |
80b619d5 | 89 | RETURN_STATUS Status;\r |
3b96221f | 90 | \r |
12998837 AP |
91 | ASSERT (mXenLeaf != 0);\r |
92 | \r | |
93 | //\r | |
94 | // Prepare HyperPages to be able to make hypercalls\r | |
95 | //\r | |
96 | \r | |
97 | AsmCpuid (mXenLeaf + 2, &TransferPages, &TransferReg, NULL, NULL);\r | |
3b96221f AP |
98 | mXenInfo.HyperPages = AllocatePages (TransferPages);\r |
99 | if (!mXenInfo.HyperPages) {\r | |
100 | return EFI_OUT_OF_RESOURCES;\r | |
101 | }\r | |
102 | \r | |
103 | for (Index = 0; Index < TransferPages; Index++) {\r | |
104 | AsmWriteMsr64 (TransferReg,\r | |
105 | (UINTN) mXenInfo.HyperPages +\r | |
106 | (Index << EFI_PAGE_SHIFT) + Index);\r | |
107 | }\r | |
108 | \r | |
12998837 AP |
109 | //\r |
110 | // Find out the Xen version\r | |
111 | //\r | |
112 | \r | |
113 | AsmCpuid (mXenLeaf + 1, &XenVersion, NULL, NULL, NULL);\r | |
3b96221f AP |
114 | DEBUG ((DEBUG_ERROR, "Detected Xen version %d.%d\n",\r |
115 | XenVersion >> 16, XenVersion & 0xFFFF));\r | |
116 | mXenInfo.VersionMajor = (UINT16)(XenVersion >> 16);\r | |
117 | mXenInfo.VersionMinor = (UINT16)(XenVersion & 0xFFFF);\r | |
118 | \r | |
8651e1ce AP |
119 | //\r |
120 | // Check if there are information left by hvmloader\r | |
121 | //\r | |
122 | \r | |
123 | Info = (EFI_XEN_OVMF_INFO *)(UINTN) OVMF_INFO_PHYSICAL_ADDRESS;\r | |
124 | //\r | |
125 | // Copy the signature, and make it null-terminated.\r | |
126 | //\r | |
127 | AsciiStrnCpyS (Sig, sizeof (Sig), (CHAR8 *) &Info->Signature,\r | |
128 | sizeof (Info->Signature));\r | |
129 | if (AsciiStrCmp (Sig, "XenHVMOVMF") == 0) {\r | |
130 | mXenHvmloaderInfo = Info;\r | |
131 | } else {\r | |
132 | mXenHvmloaderInfo = NULL;\r | |
133 | }\r | |
3b96221f | 134 | \r |
60d26545 AP |
135 | mXenInfo.RsdpPvh = NULL;\r |
136 | \r | |
137 | //\r | |
138 | // Locate and use information from the start of day structure if we have\r | |
139 | // booted via the PVH entry point.\r | |
140 | //\r | |
141 | \r | |
142 | PVHResetVectorData = (VOID *)(UINTN) PcdGet32 (PcdXenPvhStartOfDayStructPtr);\r | |
143 | //\r | |
144 | // That magic value is written in XenResetVector/Ia32/XenPVHMain.asm\r | |
145 | //\r | |
146 | if (PVHResetVectorData[1] == SIGNATURE_32 ('X', 'P', 'V', 'H')) {\r | |
147 | struct hvm_start_info *HVMStartInfo;\r | |
148 | \r | |
149 | HVMStartInfo = (VOID *)(UINTN) PVHResetVectorData[0];\r | |
150 | if (HVMStartInfo->magic == XEN_HVM_START_MAGIC_VALUE) {\r | |
151 | ASSERT (HVMStartInfo->rsdp_paddr != 0);\r | |
152 | if (HVMStartInfo->rsdp_paddr != 0) {\r | |
153 | mXenInfo.RsdpPvh = (VOID *)(UINTN)HVMStartInfo->rsdp_paddr;\r | |
154 | }\r | |
155 | }\r | |
156 | }\r | |
157 | \r | |
3b96221f AP |
158 | BuildGuidDataHob (\r |
159 | &gEfiXenInfoGuid,\r | |
160 | &mXenInfo,\r | |
161 | sizeof(mXenInfo)\r | |
162 | );\r | |
163 | \r | |
80b619d5 AP |
164 | //\r |
165 | // Initialize the XenHypercall library, now that the XenInfo HOB is\r | |
166 | // available\r | |
167 | //\r | |
168 | Status = XenHypercallLibInit ();\r | |
169 | ASSERT_RETURN_ERROR (Status);\r | |
170 | \r | |
3b96221f AP |
171 | return EFI_SUCCESS;\r |
172 | }\r | |
173 | \r | |
174 | /**\r | |
175 | Figures out if we are running inside Xen HVM.\r | |
176 | \r | |
177 | @retval TRUE Xen was detected\r | |
178 | @retval FALSE Xen was not detected\r | |
179 | \r | |
180 | **/\r | |
181 | BOOLEAN\r | |
182 | XenDetect (\r | |
183 | VOID\r | |
184 | )\r | |
185 | {\r | |
186 | UINT8 Signature[13];\r | |
187 | \r | |
188 | if (mXenLeaf != 0) {\r | |
189 | return TRUE;\r | |
190 | }\r | |
191 | \r | |
192 | Signature[12] = '\0';\r | |
193 | for (mXenLeaf = 0x40000000; mXenLeaf < 0x40010000; mXenLeaf += 0x100) {\r | |
194 | AsmCpuid (mXenLeaf,\r | |
195 | NULL,\r | |
196 | (UINT32 *) &Signature[0],\r | |
197 | (UINT32 *) &Signature[4],\r | |
198 | (UINT32 *) &Signature[8]);\r | |
199 | \r | |
200 | if (!AsciiStrCmp ((CHAR8 *) Signature, "XenVMMXenVMM")) {\r | |
201 | return TRUE;\r | |
202 | }\r | |
203 | }\r | |
204 | \r | |
205 | mXenLeaf = 0;\r | |
206 | return FALSE;\r | |
207 | }\r | |
208 | \r | |
4022f7fa AP |
209 | BOOLEAN\r |
210 | XenHvmloaderDetected (\r | |
211 | VOID\r | |
212 | )\r | |
213 | {\r | |
214 | return (mXenHvmloaderInfo != NULL);\r | |
215 | }\r | |
3b96221f | 216 | \r |
64eac295 AP |
217 | BOOLEAN\r |
218 | XenPvhDetected (\r | |
219 | VOID\r | |
220 | )\r | |
221 | {\r | |
222 | //\r | |
223 | // This function should only be used after XenConnect\r | |
224 | //\r | |
225 | ASSERT (mXenInfo.HyperPages != NULL);\r | |
226 | \r | |
227 | return mXenHvmloaderInfo == NULL;\r | |
228 | }\r | |
229 | \r | |
3b96221f AP |
230 | VOID\r |
231 | XenPublishRamRegions (\r | |
232 | VOID\r | |
233 | )\r | |
234 | {\r | |
235 | EFI_E820_ENTRY64 *E820Map;\r | |
236 | UINT32 E820EntriesCount;\r | |
237 | EFI_STATUS Status;\r | |
238 | \r | |
239 | DEBUG ((DEBUG_INFO, "Using memory map provided by Xen\n"));\r | |
240 | \r | |
241 | //\r | |
242 | // Parse RAM in E820 map\r | |
243 | //\r | |
244 | E820EntriesCount = 0;\r | |
245 | Status = XenGetE820Map (&E820Map, &E820EntriesCount);\r | |
246 | \r | |
247 | ASSERT_EFI_ERROR (Status);\r | |
248 | \r | |
249 | if (E820EntriesCount > 0) {\r | |
250 | EFI_E820_ENTRY64 *Entry;\r | |
251 | UINT32 Loop;\r | |
252 | \r | |
253 | for (Loop = 0; Loop < E820EntriesCount; Loop++) {\r | |
254 | Entry = E820Map + Loop;\r | |
255 | \r | |
256 | //\r | |
257 | // Only care about RAM\r | |
258 | //\r | |
259 | if (Entry->Type != EfiAcpiAddressRangeMemory) {\r | |
260 | continue;\r | |
261 | }\r | |
262 | \r | |
263 | AddMemoryBaseSizeHob (Entry->BaseAddr, Entry->Length);\r | |
264 | \r | |
265 | MtrrSetMemoryAttribute (Entry->BaseAddr, Entry->Length, CacheWriteBack);\r | |
266 | }\r | |
267 | }\r | |
268 | }\r | |
269 | \r | |
270 | \r | |
271 | /**\r | |
272 | Perform Xen PEI initialization.\r | |
273 | \r | |
274 | @return EFI_SUCCESS Xen initialized successfully\r | |
275 | @return EFI_NOT_FOUND Not running under Xen\r | |
276 | \r | |
277 | **/\r | |
278 | EFI_STATUS\r | |
279 | InitializeXen (\r | |
280 | VOID\r | |
281 | )\r | |
282 | {\r | |
283 | RETURN_STATUS PcdStatus;\r | |
284 | \r | |
3b96221f AP |
285 | //\r |
286 | // Reserve away HVMLOADER reserved memory [0xFC000000,0xFD000000).\r | |
287 | // This needs to match HVMLOADER RESERVED_MEMBASE/RESERVED_MEMSIZE.\r | |
288 | //\r | |
289 | AddReservedMemoryBaseSizeHob (0xFC000000, 0x1000000, FALSE);\r | |
290 | \r | |
291 | PcdStatus = PcdSetBoolS (PcdPciDisableBusEnumeration, TRUE);\r | |
292 | ASSERT_RETURN_ERROR (PcdStatus);\r | |
293 | \r | |
294 | return EFI_SUCCESS;\r | |
295 | }\r |