From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
 .../BaseMemEncryptSevLib/X64/MemEncryptSevLib.c    | 90 ++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 roms/edk2/OvmfPkg/Library/BaseMemEncryptSevLib/X64/MemEncryptSevLib.c

(limited to 'roms/edk2/OvmfPkg/Library/BaseMemEncryptSevLib/X64/MemEncryptSevLib.c')

diff --git a/roms/edk2/OvmfPkg/Library/BaseMemEncryptSevLib/X64/MemEncryptSevLib.c b/roms/edk2/OvmfPkg/Library/BaseMemEncryptSevLib/X64/MemEncryptSevLib.c
new file mode 100644
index 000000000..cf0921e21
--- /dev/null
+++ b/roms/edk2/OvmfPkg/Library/BaseMemEncryptSevLib/X64/MemEncryptSevLib.c
@@ -0,0 +1,90 @@
+/** @file
+
+  Secure Encrypted Virtualization (SEV) library helper function
+
+  Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemEncryptSevLib.h>
+#include <Register/Amd/Cpuid.h>
+#include <Register/Amd/Msr.h>
+#include <Register/Cpuid.h>
+
+#include "VirtualMemory.h"
+
+/**
+  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
+  )
+{
+  return InternalMemEncryptSevSetMemoryDecrypted (
+           Cr3BaseAddress,
+           BaseAddress,
+           EFI_PAGES_TO_SIZE (NumPages),
+           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
+  )
+{
+  return InternalMemEncryptSevSetMemoryEncrypted (
+           Cr3BaseAddress,
+           BaseAddress,
+           EFI_PAGES_TO_SIZE (NumPages),
+           Flush
+           );
+}
-- 
cgit 1.2.3-korg