diff options
Diffstat (limited to 'UefiCpuPkg/Library')
| -rw-r--r-- | UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c | 121 | ||||
| -rw-r--r-- | UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.inf | 27 | ||||
| -rw-r--r-- | UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.uni | 15 |
3 files changed, 163 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c b/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c new file mode 100644 index 0000000000..bb265e1700 --- /dev/null +++ b/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.c @@ -0,0 +1,121 @@ +/** @file
+ VMGEXIT Base Support Library.
+
+ Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+#include <Uefi.h>
+#include <Library/VmgExitLib.h>
+
+/**
+ Perform VMGEXIT.
+
+ Sets the necessary fields of the GHCB, invokes the VMGEXIT instruction and
+ then handles the return actions.
+
+ The base library function returns an error in the form of a
+ GHCB_EVENT_INJECTION representing a GP_EXCEPTION.
+
+ @param[in, out] Ghcb A pointer to the GHCB
+ @param[in] ExitCode VMGEXIT code to be assigned to the SwExitCode
+ field of the GHCB.
+ @param[in] ExitInfo1 VMGEXIT information to be assigned to the
+ SwExitInfo1 field of the GHCB.
+ @param[in] ExitInfo2 VMGEXIT information to be assigned to the
+ SwExitInfo2 field of the GHCB.
+
+ @retval 0 VMGEXIT succeeded.
+ @return Exception number to be propagated, VMGEXIT
+ processing did not succeed.
+
+**/
+UINT64
+EFIAPI
+VmgExit (
+ IN OUT GHCB *Ghcb,
+ IN UINT64 ExitCode,
+ IN UINT64 ExitInfo1,
+ IN UINT64 ExitInfo2
+ )
+{
+ GHCB_EVENT_INJECTION Event;
+
+ Event.Uint64 = 0;
+ Event.Elements.Vector = GP_EXCEPTION;
+ Event.Elements.Type = GHCB_EVENT_INJECTION_TYPE_EXCEPTION;
+ Event.Elements.Valid = 1;
+
+ return Event.Uint64;
+}
+
+/**
+ Perform pre-VMGEXIT initialization/preparation.
+
+ Performs the necessary steps in preparation for invoking VMGEXIT. Must be
+ called before setting any fields within the GHCB.
+
+ The base library function does nothing.
+
+ @param[in, out] Ghcb A pointer to the GHCB
+
+**/
+VOID
+EFIAPI
+VmgInit (
+ IN OUT GHCB *Ghcb
+ )
+{
+}
+
+/**
+ Perform post-VMGEXIT cleanup.
+
+ Performs the necessary steps to cleanup after invoking VMGEXIT. Must be
+ called after obtaining needed fields within the GHCB.
+
+ The base library function does nothing.
+
+ @param[in, out] Ghcb A pointer to the GHCB
+
+**/
+VOID
+EFIAPI
+VmgDone (
+ IN OUT GHCB *Ghcb
+ )
+{
+}
+
+/**
+ Handle a #VC exception.
+
+ Performs the necessary processing to handle a #VC exception.
+
+ The base library function returns an error equal to VC_EXCEPTION,
+ to be propagated to the standard exception handling stack.
+
+ @param[in, out] ExceptionType Pointer to an EFI_EXCEPTION_TYPE to be set
+ as value to use on error.
+ @param[in, out] SystemContext Pointer to EFI_SYSTEM_CONTEXT
+
+ @retval EFI_SUCCESS Exception handled
+ @retval EFI_UNSUPPORTED #VC not supported, (new) exception value to
+ propagate provided
+ @retval EFI_PROTOCOL_ERROR #VC handling failed, (new) exception value to
+ propagate provided
+
+**/
+EFI_STATUS
+EFIAPI
+VmgExitHandleVc (
+ IN OUT EFI_EXCEPTION_TYPE *ExceptionType,
+ IN OUT EFI_SYSTEM_CONTEXT SystemContext
+ )
+{
+ *ExceptionType = VC_EXCEPTION;
+
+ return EFI_UNSUPPORTED;
+}
diff --git a/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.inf b/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.inf new file mode 100644 index 0000000000..d8770a21c3 --- /dev/null +++ b/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.inf @@ -0,0 +1,27 @@ +## @file
+# VMGEXIT Support Library.
+#
+# Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = VmgExitLibNull
+ MODULE_UNI_FILE = VmgExitLibNull.uni
+ FILE_GUID = 3cd7368f-ef9b-4a9b-9571-2ed93813677e
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = VmgExitLib
+
+[Sources.common]
+ VmgExitLibNull.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ UefiCpuPkg/UefiCpuPkg.dec
+
+[LibraryClasses]
+ BaseLib
+
diff --git a/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.uni b/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.uni new file mode 100644 index 0000000000..8639bc0e8c --- /dev/null +++ b/UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.uni @@ -0,0 +1,15 @@ +// /** @file
+// VMGEXIT support library instance.
+//
+// VMGEXIT support library instance.
+//
+// Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT #language en-US "VMGEXIT support NULL library instance"
+
+#string STR_MODULE_DESCRIPTION #language en-US "VMGEXIT support NULL library instance."
+
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