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abcbbb14 AP |
1 | /** @file\r |
2 | Functions to make Xen hypercalls.\r | |
3 | \r | |
4 | Copyright (C) 2014, Citrix Ltd.\r | |
5 | \r | |
b26f0cf9 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
abcbbb14 AP |
7 | \r |
8 | **/\r | |
9 | \r | |
10 | #include <PiDxe.h>\r | |
abcbbb14 AP |
11 | \r |
12 | #include <IndustryStandard/Xen/hvm/params.h>\r | |
13 | #include <IndustryStandard/Xen/memory.h>\r | |
14 | \r | |
cd8ff8fd AB |
15 | #include <Library/DebugLib.h>\r |
16 | #include <Library/XenHypercallLib.h>\r | |
abcbbb14 | 17 | \r |
68f4599d AP |
18 | RETURN_STATUS\r |
19 | EFIAPI\r | |
20 | XenHypercallLibConstruct (\r | |
21 | VOID\r | |
22 | )\r | |
23 | {\r | |
24 | XenHypercallLibInit ();\r | |
25 | //\r | |
26 | // We don't fail library construction, since that has catastrophic\r | |
27 | // consequences for client modules (whereas those modules may easily be\r | |
28 | // running on a non-Xen platform). Instead, XenHypercallIsAvailable()\r | |
29 | // will return FALSE.\r | |
30 | //\r | |
31 | return RETURN_SUCCESS;\r | |
32 | }\r | |
33 | \r | |
abcbbb14 | 34 | UINT64\r |
6ad157c3 | 35 | EFIAPI\r |
abcbbb14 | 36 | XenHypercallHvmGetParam (\r |
cec6ad0a | 37 | IN UINT32 Index\r |
abcbbb14 AP |
38 | )\r |
39 | {\r | |
40 | xen_hvm_param_t Parameter;\r | |
41 | INTN Error;\r | |
42 | \r | |
abcbbb14 AP |
43 | Parameter.domid = DOMID_SELF;\r |
44 | Parameter.index = Index;\r | |
bbc3758a | 45 | Error = XenHypercall2 (__HYPERVISOR_hvm_op,\r |
abcbbb14 AP |
46 | HVMOP_get_param, (INTN) &Parameter);\r |
47 | if (Error != 0) {\r | |
48 | DEBUG ((EFI_D_ERROR,\r | |
6394c35a LE |
49 | "XenHypercall: Error %Ld trying to get HVM parameter %d\n",\r |
50 | (INT64)Error, Index));\r | |
abcbbb14 AP |
51 | return 0;\r |
52 | }\r | |
53 | return Parameter.value;\r | |
54 | }\r | |
55 | \r | |
56 | INTN\r | |
6ad157c3 | 57 | EFIAPI\r |
abcbbb14 | 58 | XenHypercallMemoryOp (\r |
abcbbb14 AP |
59 | IN UINTN Operation,\r |
60 | IN OUT VOID *Arguments\r | |
61 | )\r | |
62 | {\r | |
bbc3758a | 63 | return XenHypercall2 (__HYPERVISOR_memory_op,\r |
abcbbb14 AP |
64 | Operation, (INTN) Arguments);\r |
65 | }\r | |
66 | \r | |
67 | INTN\r | |
6ad157c3 | 68 | EFIAPI\r |
abcbbb14 | 69 | XenHypercallEventChannelOp (\r |
abcbbb14 AP |
70 | IN INTN Operation,\r |
71 | IN OUT VOID *Arguments\r | |
72 | )\r | |
73 | {\r | |
bbc3758a | 74 | return XenHypercall2 (__HYPERVISOR_event_channel_op,\r |
abcbbb14 AP |
75 | Operation, (INTN) Arguments);\r |
76 | }\r |