projects / mirror_edk2.git / blame
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| a1f22614 BS |
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 | |
| 7 | This program and the accompanying materials are licensed and made available\r | |
| 8 | under the terms and conditions of the BSD License which accompanies this\r | |
| 9 | distribution. The full text of the license may be found at\r | |
| 10 | http://opensource.org/licenses/bsd-license.php\r | |
| 11 | \r | |
| 12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 14 | \r | |
| 15 | **/\r | |
| 16 | \r | |
| 17 | #ifndef _MEM_ENCRYPT_SEV_LIB_H_\r | |
| 18 | #define _MEM_ENCRYPT_SEV_LIB_H_\r | |
| 19 | \r | |
| 20 | #include <Base.h>\r | |
| 21 | \r | |
| 22 | /**\r | |
| 23 | Returns a boolean to indicate whether SEV is enabled\r | |
| 24 | \r | |
| 25 | @retval TRUE SEV is active\r | |
| 26 | @retval FALSE SEV is not enabled\r | |
| 27 | **/\r | |
| 28 | BOOLEAN\r | |
| 29 | EFIAPI\r | |
| 30 | MemEncryptSevIsEnabled (\r | |
| 31 | VOID\r | |
| 32 | );\r | |
| 33 | \r | |
| 34 | /**\r | |
| 35 | This function clears memory encryption bit for the memory region specified\r | |
| 36 | by BaseAddress and Number of pages from the current page table context.\r | |
| 37 | \r | |
| 38 | @param[in] BaseAddress The physical address that is the start address\r | |
| 39 | of a memory region.\r | |
| 40 | @param[in] NumberOfPages The number of pages from start memory region.\r | |
| 41 | @param[in] Flush Flush the caches before clearing the bit\r | |
| 42 | (mostly TRUE except MMIO addresses)\r | |
| 43 | \r | |
| 44 | @retval RETURN_SUCCESS The attributes were cleared for the memory region.\r | |
| 45 | @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r | |
| 46 | @retval RETURN_UNSUPPORTED Clearing memory encryption attribute is not\r | |
| 47 | supported\r | |
| 48 | **/\r | |
| 49 | RETURN_STATUS\r | |
| 50 | EFIAPI\r | |
| 51 | MemEncryptSevClearPageEncMask (\r | |
| 52 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r | |
| 53 | IN PHYSICAL_ADDRESS BaseAddress,\r | |
| 54 | IN UINTN NumberOfPages,\r | |
| 55 | IN BOOLEAN CacheFlush\r | |
| 56 | );\r | |
| 57 | \r | |
| 58 | /**\r | |
| 59 | This function sets memory encryption bit for the memory region specified by\r | |
| 60 | BaseAddress and Number of pages from the current page table context.\r | |
| 61 | \r | |
| 62 | @param[in] BaseAddress The physical address that is the start address\r | |
| 63 | of a memory region.\r | |
| 64 | @param[in] NumberOfPages The number of pages from start memory region.\r | |
| 65 | @param[in] Flush Flush the caches before clearing the bit\r | |
| 66 | (mostly TRUE except MMIO addresses)\r | |
| 67 | \r | |
| 68 | @retval RETURN_SUCCESS The attributes were set for the memory region.\r | |
| 69 | @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r | |
| 70 | @retval RETURN_UNSUPPORTED Clearing memory encryption attribute is not\r | |
| 71 | supported\r | |
| 72 | **/\r | |
| 73 | RETURN_STATUS\r | |
| 74 | EFIAPI\r | |
| 75 | MemEncryptSevSetPageEncMask (\r | |
| 76 | IN PHYSICAL_ADDRESS Cr3BaseAddress,\r | |
| 77 | IN PHYSICAL_ADDRESS BaseAddress,\r | |
| 78 | IN UINTN NumberOfPages,\r | |
| 79 | IN BOOLEAN CacheFlush\r | |
| 80 | );\r | |
| 81 | #endif // _MEM_ENCRYPT_SEV_LIB_H_\r |