projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| a746ca5b TL |
1 | /** @file\r |
| 2 | \r | |
| 3 | Virtual Memory Management Services to set or clear the memory encryption bit\r | |
| 4 | \r | |
| 5 | Copyright (c) 2020, AMD Incorporated. All rights reserved.<BR>\r | |
| 6 | \r | |
| 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
| 8 | \r | |
| 9 | **/\r | |
| 10 | \r | |
| 11 | #include <Library/CpuLib.h>\r | |
| 12 | #include <Library/MemEncryptSevLib.h>\r | |
| 13 | \r | |
| 14 | #include "VirtualMemory.h"\r | |
| 15 | \r | |
| c330af02 TL |
16 | /**\r |
| 17 | Return the pagetable memory encryption mask.\r | |
| 18 | \r | |
| 19 | @return The pagetable memory encryption mask.\r | |
| 20 | \r | |
| 21 | **/\r | |
| 22 | UINT64\r | |
| 23 | EFIAPI\r | |
| 24 | InternalGetMemEncryptionAddressMask (\r | |
| 25 | VOID\r | |
| 26 | )\r | |
| 27 | {\r | |
| ac0a286f | 28 | UINT64 EncryptionMask;\r |
| c330af02 | 29 | \r |
| ac0a286f | 30 | EncryptionMask = MemEncryptSevGetEncryptionMask ();\r |
| c330af02 TL |
31 | EncryptionMask &= PAGING_1G_ADDRESS_MASK_64;\r |
| 32 | \r | |
| 33 | return EncryptionMask;\r | |
| 34 | }\r | |
| 35 | \r | |
| a746ca5b TL |
36 | /**\r |
| 37 | This function clears memory encryption bit for the memory region specified by\r | |
| 38 | PhysicalAddress and Length from the current page table context.\r | |
| 39 | \r | |
| 40 | @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r | |
| 41 | current CR3)\r | |
| 42 | @param[in] PhysicalAddress The physical address that is the start\r | |
| 43 | address of a memory region.\r | |
| 44 | @param[in] Length The length of memory region\r | |
| a746ca5b TL |
45 | \r |
| 46 | @retval RETURN_SUCCESS The attributes were cleared for the\r | |
| 47 | memory region.\r | |
| 48 | @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r | |
| 49 | @retval RETURN_UNSUPPORTED Clearing the memory encyrption attribute\r | |
| 50 | is not supported\r | |
| 51 | **/\r | |
| 52 | RETURN_STATUS\r | |
| 53 | EFIAPI\r | |
| 54 | InternalMemEncryptSevSetMemoryDecrypted (\r | |
| ac0a286f MK |
55 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r |
| 56 | IN PHYSICAL_ADDRESS PhysicalAddress,\r | |
| 57 | IN UINTN Length\r | |
| a746ca5b TL |
58 | )\r |
| 59 | {\r | |
| 60 | //\r | |
| 61 | // This function is not available during SEC.\r | |
| 62 | //\r | |
| 63 | return RETURN_UNSUPPORTED;\r | |
| 64 | }\r | |
| 65 | \r | |
| 66 | /**\r | |
| 67 | This function sets memory encryption bit for the memory region specified by\r | |
| 68 | PhysicalAddress and Length from the current page table context.\r | |
| 69 | \r | |
| 70 | @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r | |
| 71 | current CR3)\r | |
| 72 | @param[in] PhysicalAddress The physical address that is the start\r | |
| 73 | address of a memory region.\r | |
| 74 | @param[in] Length The length of memory region\r | |
| 75 | @param[in] Flush Flush the caches before applying the\r | |
| 76 | encryption mask\r | |
| 77 | \r | |
| 78 | @retval RETURN_SUCCESS The attributes were set for the memory\r | |
| 79 | region.\r | |
| 80 | @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r | |
| 81 | @retval RETURN_UNSUPPORTED Setting the memory encyrption attribute\r | |
| 82 | is not supported\r | |
| 83 | **/\r | |
| 84 | RETURN_STATUS\r | |
| 85 | EFIAPI\r | |
| 86 | InternalMemEncryptSevSetMemoryEncrypted (\r | |
| ac0a286f MK |
87 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r |
| 88 | IN PHYSICAL_ADDRESS PhysicalAddress,\r | |
| 89 | IN UINTN Length\r | |
| a746ca5b TL |
90 | )\r |
| 91 | {\r | |
| 92 | //\r | |
| 93 | // This function is not available during SEC.\r | |
| 94 | //\r | |
| 95 | return RETURN_UNSUPPORTED;\r | |
| 96 | }\r | |
| 901a9bfc BS |
97 | \r |
| 98 | /**\r | |
| 99 | This function clears memory encryption bit for the MMIO region specified by\r | |
| 100 | PhysicalAddress and Length.\r | |
| 101 | \r | |
| 102 | @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r | |
| 103 | current CR3)\r | |
| 104 | @param[in] PhysicalAddress The physical address that is the start\r | |
| 105 | address of a MMIO region.\r | |
| 106 | @param[in] Length The length of memory region\r | |
| 107 | \r | |
| 108 | @retval RETURN_SUCCESS The attributes were cleared for the\r | |
| 109 | memory region.\r | |
| 110 | @retval RETURN_INVALID_PARAMETER Length is zero.\r | |
| 111 | @retval RETURN_UNSUPPORTED Clearing the memory encyrption attribute\r | |
| 112 | is not supported\r | |
| 113 | **/\r | |
| 114 | RETURN_STATUS\r | |
| 115 | EFIAPI\r | |
| 116 | InternalMemEncryptSevClearMmioPageEncMask (\r | |
| ac0a286f MK |
117 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r |
| 118 | IN PHYSICAL_ADDRESS PhysicalAddress,\r | |
| 119 | IN UINTN Length\r | |
| 901a9bfc BS |
120 | )\r |
| 121 | {\r | |
| 122 | //\r | |
| 123 | // This function is not available during SEC.\r | |
| 124 | //\r | |
| 125 | return RETURN_UNSUPPORTED;\r | |
| 126 | }\r |