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eec7d420 | 1 | /**@file\r |
2 | Xen Platform PEI support\r | |
3 | \r | |
035ce3b3 | 4 | Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\r |
eec7d420 | 5 | Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>\r |
6 | \r | |
b26f0cf9 | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
eec7d420 | 8 | \r |
9 | **/\r | |
10 | \r | |
11 | //\r | |
12 | // The package level header files this module uses\r | |
13 | //\r | |
14 | #include <PiPei.h>\r | |
15 | \r | |
16 | //\r | |
17 | // The Library classes this module consumes\r | |
18 | //\r | |
19 | #include <Library/DebugLib.h>\r | |
20 | #include <Library/HobLib.h>\r | |
21 | #include <Library/MemoryAllocationLib.h>\r | |
22 | #include <Library/PcdLib.h>\r | |
23 | #include <Guid/XenInfo.h>\r | |
18f31ada JJ |
24 | #include <IndustryStandard/E820.h>\r |
25 | #include <Library/ResourcePublicationLib.h>\r | |
26 | #include <Library/MtrrLib.h>\r | |
eec7d420 | 27 | \r |
28 | #include "Platform.h"\r | |
bb6a9a93 | 29 | #include "Xen.h"\r |
eec7d420 | 30 | \r |
b621bb0a JJ |
31 | BOOLEAN mXen = FALSE;\r |
32 | \r | |
b98b4941 JJ |
33 | STATIC UINT32 mXenLeaf = 0;\r |
34 | \r | |
eec7d420 | 35 | EFI_XEN_INFO mXenInfo;\r |
36 | \r | |
bb6a9a93 WL |
37 | /**\r |
38 | Returns E820 map provided by Xen\r | |
39 | \r | |
40 | @param Entries Pointer to E820 map\r | |
41 | @param Count Number of entries\r | |
42 | \r | |
43 | @return EFI_STATUS\r | |
44 | **/\r | |
45 | EFI_STATUS\r | |
46 | XenGetE820Map (\r | |
47 | EFI_E820_ENTRY64 **Entries,\r | |
48 | UINT32 *Count\r | |
49 | )\r | |
50 | {\r | |
51 | EFI_XEN_OVMF_INFO *Info =\r | |
52 | (EFI_XEN_OVMF_INFO *)(UINTN) OVMF_INFO_PHYSICAL_ADDRESS;\r | |
53 | \r | |
54 | if (AsciiStrCmp ((CHAR8 *) Info->Signature, "XenHVMOVMF")) {\r | |
55 | return EFI_NOT_FOUND;\r | |
56 | }\r | |
57 | \r | |
58 | ASSERT (Info->E820 < MAX_ADDRESS);\r | |
59 | *Entries = (EFI_E820_ENTRY64 *)(UINTN) Info->E820;\r | |
60 | *Count = Info->E820EntriesCount;\r | |
61 | \r | |
62 | return EFI_SUCCESS;\r | |
63 | }\r | |
eec7d420 | 64 | \r |
65 | /**\r | |
66 | Connects to the Hypervisor.\r | |
67 | \r | |
68 | @param XenLeaf CPUID index used to connect.\r | |
69 | \r | |
70 | @return EFI_STATUS\r | |
71 | \r | |
72 | **/\r | |
73 | EFI_STATUS\r | |
74 | XenConnect (\r | |
75 | UINT32 XenLeaf\r | |
76 | )\r | |
77 | {\r | |
78 | UINT32 Index;\r | |
79 | UINT32 TransferReg;\r | |
80 | UINT32 TransferPages;\r | |
81 | UINT32 XenVersion;\r | |
82 | \r | |
83 | AsmCpuid (XenLeaf + 2, &TransferPages, &TransferReg, NULL, NULL);\r | |
84 | mXenInfo.HyperPages = AllocatePages (TransferPages);\r | |
85 | if (!mXenInfo.HyperPages) {\r | |
86 | return EFI_OUT_OF_RESOURCES;\r | |
87 | }\r | |
88 | \r | |
89 | for (Index = 0; Index < TransferPages; Index++) {\r | |
90 | AsmWriteMsr64 (TransferReg,\r | |
91 | (UINTN) mXenInfo.HyperPages +\r | |
92 | (Index << EFI_PAGE_SHIFT) + Index);\r | |
93 | }\r | |
94 | \r | |
95 | AsmCpuid (XenLeaf + 1, &XenVersion, NULL, NULL, NULL);\r | |
96 | DEBUG ((EFI_D_ERROR, "Detected Xen version %d.%d\n",\r | |
97 | XenVersion >> 16, XenVersion & 0xFFFF));\r | |
670a64e7 | 98 | mXenInfo.VersionMajor = (UINT16)(XenVersion >> 16);\r |
99 | mXenInfo.VersionMinor = (UINT16)(XenVersion & 0xFFFF);\r | |
eec7d420 | 100 | \r |
101 | /* TBD: Locate hvm_info and reserve it away. */\r | |
102 | mXenInfo.HvmInfo = NULL;\r | |
103 | \r | |
104 | BuildGuidDataHob (\r | |
105 | &gEfiXenInfoGuid,\r | |
106 | &mXenInfo,\r | |
107 | sizeof(mXenInfo)\r | |
108 | );\r | |
109 | \r | |
110 | return EFI_SUCCESS;\r | |
111 | }\r | |
112 | \r | |
113 | /**\r | |
114 | Figures out if we are running inside Xen HVM.\r | |
115 | \r | |
b98b4941 JJ |
116 | @retval TRUE Xen was detected\r |
117 | @retval FALSE Xen was not detected\r | |
eec7d420 | 118 | \r |
119 | **/\r | |
b98b4941 | 120 | BOOLEAN\r |
eec7d420 | 121 | XenDetect (\r |
122 | VOID\r | |
123 | )\r | |
124 | {\r | |
eec7d420 | 125 | UINT8 Signature[13];\r |
126 | \r | |
b98b4941 JJ |
127 | if (mXenLeaf != 0) {\r |
128 | return TRUE;\r | |
129 | }\r | |
130 | \r | |
131 | Signature[12] = '\0';\r | |
132 | for (mXenLeaf = 0x40000000; mXenLeaf < 0x40010000; mXenLeaf += 0x100) {\r | |
133 | AsmCpuid (mXenLeaf,\r | |
134 | NULL,\r | |
135 | (UINT32 *) &Signature[0],\r | |
eec7d420 | 136 | (UINT32 *) &Signature[4],\r |
137 | (UINT32 *) &Signature[8]);\r | |
eec7d420 | 138 | \r |
139 | if (!AsciiStrCmp ((CHAR8 *) Signature, "XenVMMXenVMM")) {\r | |
b621bb0a | 140 | mXen = TRUE;\r |
b98b4941 | 141 | return TRUE;\r |
eec7d420 | 142 | }\r |
143 | }\r | |
144 | \r | |
b98b4941 JJ |
145 | mXenLeaf = 0;\r |
146 | return FALSE;\r | |
eec7d420 | 147 | }\r |
148 | \r | |
18f31ada JJ |
149 | \r |
150 | VOID\r | |
151 | XenPublishRamRegions (\r | |
152 | VOID\r | |
153 | )\r | |
154 | {\r | |
155 | EFI_E820_ENTRY64 *E820Map;\r | |
156 | UINT32 E820EntriesCount;\r | |
157 | EFI_STATUS Status;\r | |
158 | \r | |
159 | if (!mXen) {\r | |
160 | return;\r | |
161 | }\r | |
162 | \r | |
163 | DEBUG ((EFI_D_INFO, "Using memory map provided by Xen\n"));\r | |
164 | \r | |
165 | //\r | |
166 | // Parse RAM in E820 map\r | |
167 | //\r | |
7ffced92 | 168 | E820EntriesCount = 0;\r |
18f31ada JJ |
169 | Status = XenGetE820Map (&E820Map, &E820EntriesCount);\r |
170 | \r | |
171 | ASSERT_EFI_ERROR (Status);\r | |
172 | \r | |
173 | if (E820EntriesCount > 0) {\r | |
174 | EFI_E820_ENTRY64 *Entry;\r | |
175 | UINT32 Loop;\r | |
176 | \r | |
177 | for (Loop = 0; Loop < E820EntriesCount; Loop++) {\r | |
178 | Entry = E820Map + Loop;\r | |
179 | \r | |
180 | //\r | |
181 | // Only care about RAM\r | |
182 | //\r | |
183 | if (Entry->Type != EfiAcpiAddressRangeMemory) {\r | |
184 | continue;\r | |
185 | }\r | |
186 | \r | |
035ce3b3 | 187 | AddMemoryBaseSizeHob (Entry->BaseAddr, Entry->Length);\r |
18f31ada JJ |
188 | \r |
189 | MtrrSetMemoryAttribute (Entry->BaseAddr, Entry->Length, CacheWriteBack);\r | |
190 | }\r | |
191 | }\r | |
192 | }\r | |
193 | \r | |
194 | \r | |
eec7d420 | 195 | /**\r |
196 | Perform Xen PEI initialization.\r | |
197 | \r | |
198 | @return EFI_SUCCESS Xen initialized successfully\r | |
199 | @return EFI_NOT_FOUND Not running under Xen\r | |
200 | \r | |
201 | **/\r | |
202 | EFI_STATUS\r | |
203 | InitializeXen (\r | |
b98b4941 | 204 | VOID\r |
eec7d420 | 205 | )\r |
206 | {\r | |
32e083c7 LE |
207 | RETURN_STATUS PcdStatus;\r |
208 | \r | |
b98b4941 JJ |
209 | if (mXenLeaf == 0) {\r |
210 | return EFI_NOT_FOUND;\r | |
211 | }\r | |
212 | \r | |
213 | XenConnect (mXenLeaf);\r | |
eec7d420 | 214 | \r |
215 | //\r | |
216 | // Reserve away HVMLOADER reserved memory [0xFC000000,0xFD000000).\r | |
217 | // This needs to match HVMLOADER RESERVED_MEMBASE/RESERVED_MEMSIZE.\r | |
218 | //\r | |
cdef34ec | 219 | AddReservedMemoryBaseSizeHob (0xFC000000, 0x1000000, FALSE);\r |
eec7d420 | 220 | \r |
32e083c7 LE |
221 | PcdStatus = PcdSetBoolS (PcdPciDisableBusEnumeration, TRUE);\r |
222 | ASSERT_RETURN_ERROR (PcdStatus);\r | |
c191a58f | 223 | \r |
eec7d420 | 224 | return EFI_SUCCESS;\r |
225 | }\r |