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1 | /** @file\r |
2 | \r | |
3 | IoMmuDxe driver installs EDKII_IOMMU_PROTOCOL to provide the support for DMA\r | |
4 | operations when SEV is enabled.\r | |
5 | \r | |
6 | Copyright (c) 2017, AMD Inc. All rights reserved.<BR>\r | |
7 | \r | |
b26f0cf9 | 8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
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9 | \r |
10 | **/\r | |
11 | \r | |
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12 | #include "AmdSevIoMmu.h"\r |
13 | \r | |
14 | EFI_STATUS\r | |
15 | EFIAPI\r | |
16 | IoMmuDxeEntryPoint (\r | |
17 | IN EFI_HANDLE ImageHandle,\r | |
18 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
19 | )\r | |
20 | {\r | |
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21 | EFI_STATUS Status;\r |
22 | EFI_HANDLE Handle;\r | |
23 | \r | |
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24 | //\r |
25 | // When SEV is enabled, install IoMmu protocol otherwise install the\r | |
26 | // placeholder protocol so that other dependent module can run.\r | |
27 | //\r | |
28 | if (MemEncryptSevIsEnabled ()) {\r | |
db125079 | 29 | Status = AmdSevInstallIoMmuProtocol ();\r |
f9d129e6 | 30 | } else {\r |
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31 | Handle = NULL;\r |
32 | \r | |
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33 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
34 | &Handle,\r | |
35 | &gIoMmuAbsentProtocolGuid,\r | |
36 | NULL, NULL);\r | |
37 | }\r | |
38 | \r | |
39 | return Status;\r | |
40 | }\r |