1 files changed, 118 insertions, 0 deletions
diff --git a/roms/edk2/OvmfPkg/Include/Library/MemEncryptSevLib.h b/roms/edk2/OvmfPkg/Include/Library/MemEncryptSevLib.h
new file mode 100644
index 000000000..fc70b0114
--- /dev/null
+++ b/roms/edk2/OvmfPkg/Include/Library/MemEncryptSevLib.h
@@ -0,0 +1,118 @@
+/** @file
+
+  Define Secure Encrypted Virtualization (SEV) base library helper function
+
+  Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _MEM_ENCRYPT_SEV_LIB_H_
+#define _MEM_ENCRYPT_SEV_LIB_H_
+
+#include <Base.h>
+
+/**
+  Returns a boolean to indicate whether SEV-ES is enabled.
+
+  @retval TRUE           SEV-ES is enabled
+  @retval FALSE          SEV-ES is not enabled
+**/
+BOOLEAN
+EFIAPI
+MemEncryptSevEsIsEnabled (
+  VOID
+  );
+
+/**
+  Returns a boolean to indicate whether SEV is enabled
+
+  @retval TRUE           SEV is enabled
+  @retval FALSE          SEV is not enabled
+**/
+BOOLEAN
+EFIAPI
+MemEncryptSevIsEnabled (
+  VOID
+  );
+
+/**
+  This function clears memory encryption bit for the memory region specified by
+  BaseAddress and NumPages from the current page table context.
+
+  @param[in]  Cr3BaseAddress          Cr3 Base Address (if zero then use
+                                      current CR3)
+  @param[in]  BaseAddress             The physical address that is the start
+                                      address of a memory region.
+  @param[in]  NumPages                The number of pages from start memory
+                                      region.
+  @param[in]  Flush                   Flush the caches before clearing the bit
+                                      (mostly TRUE except MMIO addresses)
+
+  @retval RETURN_SUCCESS              The attributes were cleared for the
+                                      memory region.
+  @retval RETURN_INVALID_PARAMETER    Number of pages is zero.
+  @retval RETURN_UNSUPPORTED          Clearing the memory encryption attribute
+                                      is not supported
+**/
+RETURN_STATUS
+EFIAPI
+MemEncryptSevClearPageEncMask (
+  IN PHYSICAL_ADDRESS         Cr3BaseAddress,
+  IN PHYSICAL_ADDRESS         BaseAddress,
+  IN UINTN                    NumPages,
+  IN BOOLEAN                  Flush
+  );
+
+/**
+  This function sets memory encryption bit for the memory region specified by
+  BaseAddress and NumPages from the current page table context.
+
+  @param[in]  Cr3BaseAddress          Cr3 Base Address (if zero then use
+                                      current CR3)
+  @param[in]  BaseAddress             The physical address that is the start
+                                      address of a memory region.
+  @param[in]  NumPages                The number of pages from start memory
+                                      region.
+  @param[in]  Flush                   Flush the caches before setting the bit
+                                      (mostly TRUE except MMIO addresses)
+
+  @retval RETURN_SUCCESS              The attributes were set for the memory
+                                      region.
+  @retval RETURN_INVALID_PARAMETER    Number of pages is zero.
+  @retval RETURN_UNSUPPORTED          Setting the memory encryption attribute
+                                      is not supported
+**/
+RETURN_STATUS
+EFIAPI
+MemEncryptSevSetPageEncMask (
+  IN PHYSICAL_ADDRESS         Cr3BaseAddress,
+  IN PHYSICAL_ADDRESS         BaseAddress,
+  IN UINTN                    NumPages,
+  IN BOOLEAN                  Flush
+  );
+
+
+/**
+  Locate the page range that covers the initial (pre-SMBASE-relocation) SMRAM
+  Save State Map.
+
+  @param[out] BaseAddress     The base address of the lowest-address page that
+                              covers the initial SMRAM Save State Map.
+
+  @param[out] NumberOfPages   The number of pages in the page range that covers
+                              the initial SMRAM Save State Map.
+
+  @retval RETURN_SUCCESS      BaseAddress and NumberOfPages have been set on
+                              output.
+
+  @retval RETURN_UNSUPPORTED  SMM is unavailable.
+**/
+RETURN_STATUS
+EFIAPI
+MemEncryptSevLocateInitialSmramSaveStateMapPages (
+  OUT UINTN *BaseAddress,
+  OUT UINTN *NumberOfPages
+  );
+#endif // _MEM_ENCRYPT_SEV_LIB_H_