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1 | /** @file\r |
2 | \r | |
3 | Define Secure Encrypted Virtualization (SEV) base library helper function\r | |
4 | \r | |
5 | Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>\r | |
6 | \r | |
b26f0cf9 | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
a1f22614 BS |
8 | \r |
9 | **/\r | |
10 | \r | |
11 | #ifndef _MEM_ENCRYPT_SEV_LIB_H_\r | |
12 | #define _MEM_ENCRYPT_SEV_LIB_H_\r | |
13 | \r | |
14 | #include <Base.h>\r | |
15 | \r | |
16 | /**\r | |
17 | Returns a boolean to indicate whether SEV is enabled\r | |
18 | \r | |
d4dd22c7 | 19 | @retval TRUE SEV is enabled\r |
a1f22614 | 20 | @retval FALSE SEV is not enabled\r |
d4dd22c7 | 21 | **/\r |
a1f22614 BS |
22 | BOOLEAN\r |
23 | EFIAPI\r | |
24 | MemEncryptSevIsEnabled (\r | |
25 | VOID\r | |
26 | );\r | |
27 | \r | |
28 | /**\r | |
5b5028e6 LE |
29 | This function clears memory encryption bit for the memory region specified by\r |
30 | BaseAddress and NumPages from the current page table context.\r | |
31 | \r | |
32 | @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r | |
33 | current CR3)\r | |
34 | @param[in] BaseAddress The physical address that is the start\r | |
35 | address of a memory region.\r | |
36 | @param[in] NumPages The number of pages from start memory\r | |
37 | region.\r | |
38 | @param[in] Flush Flush the caches before clearing the bit\r | |
39 | (mostly TRUE except MMIO addresses)\r | |
40 | \r | |
41 | @retval RETURN_SUCCESS The attributes were cleared for the\r | |
42 | memory region.\r | |
43 | @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r | |
44 | @retval RETURN_UNSUPPORTED Clearing the memory encryption attribute\r | |
45 | is not supported\r | |
46 | **/\r | |
a1f22614 BS |
47 | RETURN_STATUS\r |
48 | EFIAPI\r | |
49 | MemEncryptSevClearPageEncMask (\r | |
50 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r | |
51 | IN PHYSICAL_ADDRESS BaseAddress,\r | |
5b5028e6 LE |
52 | IN UINTN NumPages,\r |
53 | IN BOOLEAN Flush\r | |
a1f22614 BS |
54 | );\r |
55 | \r | |
56 | /**\r | |
57 | This function sets memory encryption bit for the memory region specified by\r | |
154dcd6c | 58 | BaseAddress and NumPages from the current page table context.\r |
a1f22614 | 59 | \r |
154dcd6c LE |
60 | @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r |
61 | current CR3)\r | |
62 | @param[in] BaseAddress The physical address that is the start\r | |
63 | address of a memory region.\r | |
64 | @param[in] NumPages The number of pages from start memory\r | |
65 | region.\r | |
66 | @param[in] Flush Flush the caches before setting the bit\r | |
67 | (mostly TRUE except MMIO addresses)\r | |
a1f22614 | 68 | \r |
154dcd6c LE |
69 | @retval RETURN_SUCCESS The attributes were set for the memory\r |
70 | region.\r | |
71 | @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r | |
72 | @retval RETURN_UNSUPPORTED Setting the memory encryption attribute\r | |
73 | is not supported\r | |
74 | **/\r | |
a1f22614 BS |
75 | RETURN_STATUS\r |
76 | EFIAPI\r | |
77 | MemEncryptSevSetPageEncMask (\r | |
78 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r | |
79 | IN PHYSICAL_ADDRESS BaseAddress,\r | |
154dcd6c LE |
80 | IN UINTN NumPages,\r |
81 | IN BOOLEAN Flush\r | |
a1f22614 | 82 | );\r |
61a044c6 LE |
83 | \r |
84 | \r | |
85 | /**\r | |
86 | Locate the page range that covers the initial (pre-SMBASE-relocation) SMRAM\r | |
87 | Save State Map.\r | |
88 | \r | |
89 | @param[out] BaseAddress The base address of the lowest-address page that\r | |
90 | covers the initial SMRAM Save State Map.\r | |
91 | \r | |
92 | @param[out] NumberOfPages The number of pages in the page range that covers\r | |
93 | the initial SMRAM Save State Map.\r | |
94 | \r | |
95 | @retval RETURN_SUCCESS BaseAddress and NumberOfPages have been set on\r | |
96 | output.\r | |
97 | \r | |
98 | @retval RETURN_UNSUPPORTED SMM is unavailable.\r | |
99 | **/\r | |
100 | RETURN_STATUS\r | |
101 | EFIAPI\r | |
102 | MemEncryptSevLocateInitialSmramSaveStateMapPages (\r | |
103 | OUT UINTN *BaseAddress,\r | |
104 | OUT UINTN *NumberOfPages\r | |
105 | );\r | |
a1f22614 | 106 | #endif // _MEM_ENCRYPT_SEV_LIB_H_\r |