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 | |
| 28 | UINT64 EncryptionMask;\r | |
| 29 | \r | |
| 30 | EncryptionMask = MemEncryptSevGetEncryptionMask ();\r | |
| 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 | |
| 45 | @param[in] Flush Flush the caches before applying the\r | |
| 46 | encryption mask\r | |
| 47 | \r | |
| 48 | @retval RETURN_SUCCESS The attributes were cleared for the\r | |
| 49 | memory region.\r | |
| 50 | @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r | |
| 51 | @retval RETURN_UNSUPPORTED Clearing the memory encyrption attribute\r | |
| 52 | is not supported\r | |
| 53 | **/\r | |
| 54 | RETURN_STATUS\r | |
| 55 | EFIAPI\r | |
| 56 | InternalMemEncryptSevSetMemoryDecrypted (\r | |
| 57 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r | |
| 58 | IN PHYSICAL_ADDRESS PhysicalAddress,\r | |
| 59 | IN UINTN Length,\r | |
| 60 | IN BOOLEAN Flush\r | |
| 61 | )\r | |
| 62 | {\r | |
| 63 | //\r | |
| 64 | // This function is not available during SEC.\r | |
| 65 | //\r | |
| 66 | return RETURN_UNSUPPORTED;\r | |
| 67 | }\r | |
| 68 | \r | |
| 69 | /**\r | |
| 70 | This function sets memory encryption bit for the memory region specified by\r | |
| 71 | PhysicalAddress and Length from the current page table context.\r | |
| 72 | \r | |
| 73 | @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r | |
| 74 | current CR3)\r | |
| 75 | @param[in] PhysicalAddress The physical address that is the start\r | |
| 76 | address of a memory region.\r | |
| 77 | @param[in] Length The length of memory region\r | |
| 78 | @param[in] Flush Flush the caches before applying the\r | |
| 79 | encryption mask\r | |
| 80 | \r | |
| 81 | @retval RETURN_SUCCESS The attributes were set for the memory\r | |
| 82 | region.\r | |
| 83 | @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r | |
| 84 | @retval RETURN_UNSUPPORTED Setting the memory encyrption attribute\r | |
| 85 | is not supported\r | |
| 86 | **/\r | |
| 87 | RETURN_STATUS\r | |
| 88 | EFIAPI\r | |
| 89 | InternalMemEncryptSevSetMemoryEncrypted (\r | |
| 90 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r | |
| 91 | IN PHYSICAL_ADDRESS PhysicalAddress,\r | |
| 92 | IN UINTN Length,\r | |
| 93 | IN BOOLEAN Flush\r | |
| 94 | )\r | |
| 95 | {\r | |
| 96 | //\r | |
| 97 | // This function is not available during SEC.\r | |
| 98 | //\r | |
| 99 | return RETURN_UNSUPPORTED;\r | |
| 100 | }\r | |
| 901a9bfc BS |
101 | \r |
| 102 | /**\r | |
| 103 | This function clears memory encryption bit for the MMIO region specified by\r | |
| 104 | PhysicalAddress and Length.\r | |
| 105 | \r | |
| 106 | @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r | |
| 107 | current CR3)\r | |
| 108 | @param[in] PhysicalAddress The physical address that is the start\r | |
| 109 | address of a MMIO region.\r | |
| 110 | @param[in] Length The length of memory region\r | |
| 111 | \r | |
| 112 | @retval RETURN_SUCCESS The attributes were cleared for the\r | |
| 113 | memory region.\r | |
| 114 | @retval RETURN_INVALID_PARAMETER Length is zero.\r | |
| 115 | @retval RETURN_UNSUPPORTED Clearing the memory encyrption attribute\r | |
| 116 | is not supported\r | |
| 117 | **/\r | |
| 118 | RETURN_STATUS\r | |
| 119 | EFIAPI\r | |
| 120 | InternalMemEncryptSevClearMmioPageEncMask (\r | |
| 121 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r | |
| 122 | IN PHYSICAL_ADDRESS PhysicalAddress,\r | |
| 123 | IN UINTN Length\r | |
| 124 | )\r | |
| 125 | {\r | |
| 126 | //\r | |
| 127 | // This function is not available during SEC.\r | |
| 128 | //\r | |
| 129 | return RETURN_UNSUPPORTED;\r | |
| 130 | }\r |