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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 | |
4040754d | 67 | \r |
eec7d420 | 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 | |
70d5086c | 96 | DEBUG ((DEBUG_ERROR, "Detected Xen version %d.%d\n",\r |
eec7d420 | 97 | XenVersion >> 16, XenVersion & 0xFFFF));\r |
670a64e7 | 98 | mXenInfo.VersionMajor = (UINT16)(XenVersion >> 16);\r |
99 | mXenInfo.VersionMinor = (UINT16)(XenVersion & 0xFFFF);\r | |
eec7d420 | 100 | \r |
eec7d420 | 101 | BuildGuidDataHob (\r |
102 | &gEfiXenInfoGuid,\r | |
103 | &mXenInfo,\r | |
104 | sizeof(mXenInfo)\r | |
105 | );\r | |
106 | \r | |
107 | return EFI_SUCCESS;\r | |
108 | }\r | |
109 | \r | |
110 | /**\r | |
111 | Figures out if we are running inside Xen HVM.\r | |
112 | \r | |
b98b4941 JJ |
113 | @retval TRUE Xen was detected\r |
114 | @retval FALSE Xen was not detected\r | |
eec7d420 | 115 | \r |
116 | **/\r | |
b98b4941 | 117 | BOOLEAN\r |
eec7d420 | 118 | XenDetect (\r |
119 | VOID\r | |
120 | )\r | |
121 | {\r | |
eec7d420 | 122 | UINT8 Signature[13];\r |
123 | \r | |
b98b4941 JJ |
124 | if (mXenLeaf != 0) {\r |
125 | return TRUE;\r | |
126 | }\r | |
127 | \r | |
128 | Signature[12] = '\0';\r | |
129 | for (mXenLeaf = 0x40000000; mXenLeaf < 0x40010000; mXenLeaf += 0x100) {\r | |
130 | AsmCpuid (mXenLeaf,\r | |
131 | NULL,\r | |
132 | (UINT32 *) &Signature[0],\r | |
eec7d420 | 133 | (UINT32 *) &Signature[4],\r |
134 | (UINT32 *) &Signature[8]);\r | |
eec7d420 | 135 | \r |
136 | if (!AsciiStrCmp ((CHAR8 *) Signature, "XenVMMXenVMM")) {\r | |
b621bb0a | 137 | mXen = TRUE;\r |
b98b4941 | 138 | return TRUE;\r |
eec7d420 | 139 | }\r |
140 | }\r | |
141 | \r | |
b98b4941 JJ |
142 | mXenLeaf = 0;\r |
143 | return FALSE;\r | |
eec7d420 | 144 | }\r |
145 | \r | |
18f31ada JJ |
146 | \r |
147 | VOID\r | |
148 | XenPublishRamRegions (\r | |
149 | VOID\r | |
150 | )\r | |
151 | {\r | |
152 | EFI_E820_ENTRY64 *E820Map;\r | |
153 | UINT32 E820EntriesCount;\r | |
154 | EFI_STATUS Status;\r | |
155 | \r | |
156 | if (!mXen) {\r | |
157 | return;\r | |
158 | }\r | |
159 | \r | |
70d5086c | 160 | DEBUG ((DEBUG_INFO, "Using memory map provided by Xen\n"));\r |
18f31ada JJ |
161 | \r |
162 | //\r | |
163 | // Parse RAM in E820 map\r | |
164 | //\r | |
7ffced92 | 165 | E820EntriesCount = 0;\r |
18f31ada JJ |
166 | Status = XenGetE820Map (&E820Map, &E820EntriesCount);\r |
167 | \r | |
168 | ASSERT_EFI_ERROR (Status);\r | |
169 | \r | |
170 | if (E820EntriesCount > 0) {\r | |
171 | EFI_E820_ENTRY64 *Entry;\r | |
172 | UINT32 Loop;\r | |
173 | \r | |
174 | for (Loop = 0; Loop < E820EntriesCount; Loop++) {\r | |
175 | Entry = E820Map + Loop;\r | |
176 | \r | |
177 | //\r | |
178 | // Only care about RAM\r | |
179 | //\r | |
180 | if (Entry->Type != EfiAcpiAddressRangeMemory) {\r | |
181 | continue;\r | |
182 | }\r | |
183 | \r | |
035ce3b3 | 184 | AddMemoryBaseSizeHob (Entry->BaseAddr, Entry->Length);\r |
18f31ada JJ |
185 | \r |
186 | MtrrSetMemoryAttribute (Entry->BaseAddr, Entry->Length, CacheWriteBack);\r | |
187 | }\r | |
188 | }\r | |
189 | }\r | |
190 | \r | |
191 | \r | |
eec7d420 | 192 | /**\r |
193 | Perform Xen PEI initialization.\r | |
194 | \r | |
195 | @return EFI_SUCCESS Xen initialized successfully\r | |
196 | @return EFI_NOT_FOUND Not running under Xen\r | |
197 | \r | |
198 | **/\r | |
199 | EFI_STATUS\r | |
200 | InitializeXen (\r | |
b98b4941 | 201 | VOID\r |
eec7d420 | 202 | )\r |
203 | {\r | |
32e083c7 LE |
204 | RETURN_STATUS PcdStatus;\r |
205 | \r | |
b98b4941 JJ |
206 | if (mXenLeaf == 0) {\r |
207 | return EFI_NOT_FOUND;\r | |
208 | }\r | |
209 | \r | |
210 | XenConnect (mXenLeaf);\r | |
eec7d420 | 211 | \r |
212 | //\r | |
213 | // Reserve away HVMLOADER reserved memory [0xFC000000,0xFD000000).\r | |
214 | // This needs to match HVMLOADER RESERVED_MEMBASE/RESERVED_MEMSIZE.\r | |
215 | //\r | |
cdef34ec | 216 | AddReservedMemoryBaseSizeHob (0xFC000000, 0x1000000, FALSE);\r |
eec7d420 | 217 | \r |
32e083c7 LE |
218 | PcdStatus = PcdSetBoolS (PcdPciDisableBusEnumeration, TRUE);\r |
219 | ASSERT_RETURN_ERROR (PcdStatus);\r | |
c191a58f | 220 | \r |
eec7d420 | 221 | return EFI_SUCCESS;\r |
222 | }\r |