\r
Secure Encrypted Virtualization (SEV) library helper function\r
\r
- Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>\r
+ Copyright (c) 2017 - 2020, AMD Incorporated. All rights reserved.<BR>\r
\r
- This program and the accompanying materials are licensed and made available\r
- under the terms and conditions of the BSD License which accompanies this\r
- distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+ SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
-#include <Register/Cpuid.h>\r
+#include <Library/MemEncryptSevLib.h>\r
#include <Register/Amd/Cpuid.h>\r
#include <Register/Amd/Msr.h>\r
-#include <Library/MemEncryptSevLib.h>\r
+#include <Register/Cpuid.h>\r
\r
/**\r
- This function clears memory encryption bit for the memory region specified\r
- by BaseAddress and Number of pages from the current page table context.\r
-\r
- @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use current\r
- CR3)\r
- @param[in] BaseAddress The physical address that is the start\r
- address of a memory region.\r
- @param[in] NumberOfPages The number of pages from start memory\r
- region.\r
- @param[in] Flush Flush the caches before clearing the bit\r
- (mostly TRUE except MMIO addresses)\r
-\r
- @retval RETURN_SUCCESS The attributes were cleared for the memory\r
- region.\r
- @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r
- @retval RETURN_UNSUPPORTED Clearing memory encryption attribute is not\r
- supported\r
- **/\r
+ This function clears memory encryption bit for the memory region specified by\r
+ BaseAddress and NumPages from the current page table context.\r
+\r
+ @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r
+ current CR3)\r
+ @param[in] BaseAddress The physical address that is the start\r
+ address of a memory region.\r
+ @param[in] NumPages The number of pages from start memory\r
+ region.\r
+\r
+ @retval RETURN_SUCCESS The attributes were cleared for the\r
+ memory region.\r
+ @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r
+ @retval RETURN_UNSUPPORTED Clearing the memory encryption attribute\r
+ is not supported\r
+**/\r
RETURN_STATUS\r
EFIAPI\r
MemEncryptSevClearPageEncMask (\r
- IN PHYSICAL_ADDRESS Cr3BaseAddress,\r
- IN PHYSICAL_ADDRESS BaseAddress,\r
- IN UINTN NumberOfPages,\r
- IN BOOLEAN Flush\r
+ IN PHYSICAL_ADDRESS Cr3BaseAddress,\r
+ IN PHYSICAL_ADDRESS BaseAddress,\r
+ IN UINTN NumPages\r
)\r
{\r
//\r
\r
/**\r
This function sets memory encryption bit for the memory region specified by\r
- BaseAddress and Number of pages from the current page table context.\r
-\r
- @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use current\r
- CR3)\r
- @param[in] BaseAddress The physical address that is the start\r
- address of a memory region.\r
- @param[in] NumberOfPages The number of pages from start memory\r
- region.\r
- @param[in] Flush Flush the caches before clearing the bit\r
- (mostly TRUE except MMIO addresses)\r
-\r
- @retval RETURN_SUCCESS The attributes were set for the memory\r
- region.\r
- @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r
- @retval RETURN_UNSUPPORTED Clearing memory encryption attribute is not\r
- supported\r
- **/\r
+ BaseAddress and NumPages from the current page table context.\r
+\r
+ @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r
+ current CR3)\r
+ @param[in] BaseAddress The physical address that is the start\r
+ address of a memory region.\r
+ @param[in] NumPages The number of pages from start memory\r
+ region.\r
+\r
+ @retval RETURN_SUCCESS The attributes were set for the memory\r
+ region.\r
+ @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r
+ @retval RETURN_UNSUPPORTED Setting the memory encryption attribute\r
+ is not supported\r
+**/\r
RETURN_STATUS\r
EFIAPI\r
MemEncryptSevSetPageEncMask (\r
- IN PHYSICAL_ADDRESS Cr3BaseAddress,\r
- IN PHYSICAL_ADDRESS BaseAddress,\r
- IN UINTN NumberOfPages,\r
- IN BOOLEAN Flush\r
+ IN PHYSICAL_ADDRESS Cr3BaseAddress,\r
+ IN PHYSICAL_ADDRESS BaseAddress,\r
+ IN UINTN NumPages\r
+ )\r
+{\r
+ //\r
+ // Memory encryption bit is not accessible in 32-bit mode\r
+ //\r
+ return RETURN_UNSUPPORTED;\r
+}\r
+\r
+/**\r
+ Returns the encryption state of the specified virtual address range.\r
+\r
+ @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r
+ current CR3)\r
+ @param[in] BaseAddress Base address to check\r
+ @param[in] Length Length of virtual address range\r
+\r
+ @retval MemEncryptSevAddressRangeUnencrypted Address range is mapped\r
+ unencrypted\r
+ @retval MemEncryptSevAddressRangeEncrypted Address range is mapped\r
+ encrypted\r
+ @retval MemEncryptSevAddressRangeMixed Address range is mapped mixed\r
+ @retval MemEncryptSevAddressRangeError Address range is not mapped\r
+**/\r
+MEM_ENCRYPT_SEV_ADDRESS_RANGE_STATE\r
+EFIAPI\r
+MemEncryptSevGetAddressRangeState (\r
+ IN PHYSICAL_ADDRESS Cr3BaseAddress,\r
+ IN PHYSICAL_ADDRESS BaseAddress,\r
+ IN UINTN Length\r
+ )\r
+{\r
+ //\r
+ // Memory is always encrypted in 32-bit mode\r
+ //\r
+ return MemEncryptSevAddressRangeEncrypted;\r
+}\r
+\r
+/**\r
+ This function clears memory encryption bit for the MMIO region specified by\r
+ BaseAddress and NumPages.\r
+\r
+ @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use\r
+ current CR3)\r
+ @param[in] BaseAddress The physical address that is the start\r
+ address of a MMIO region.\r
+ @param[in] NumPages The number of pages from start memory\r
+ region.\r
+\r
+ @retval RETURN_SUCCESS The attributes were cleared for the\r
+ memory region.\r
+ @retval RETURN_INVALID_PARAMETER Number of pages is zero.\r
+ @retval RETURN_UNSUPPORTED Clearing the memory encryption attribute\r
+ is not supported\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+MemEncryptSevClearMmioPageEncMask (\r
+ IN PHYSICAL_ADDRESS Cr3BaseAddress,\r
+ IN PHYSICAL_ADDRESS BaseAddress,\r
+ IN UINTN NumPages\r
)\r
{\r
//\r
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