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