1 files changed, 35 insertions, 0 deletions
diff --git a/MdePkg/Include/Register/Amd/SvsmMsr.h b/MdePkg/Include/Register/Amd/SvsmMsr.h
new file mode 100644
index 0000000000..9e7fca880b
--- /dev/null
+++ b/MdePkg/Include/Register/Amd/SvsmMsr.h
@@ -0,0 +1,35 @@
+/** @file
+  MSR Definitions.
+
+  Provides defines for Machine Specific Registers(MSR) indexes. Data structures
+  are provided for MSRs that contain one or more bit fields.  If the MSR value
+  returned is a single 32-bit or 64-bit value, then a data structure is not
+  provided for that MSR.
+
+  Copyright (c) 2024, Advanced Micro Devices. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef SVSM_MSR_H_
+#define SVSM_MSR_H_
+
+/**
+  Secure VM Service Module CAA register
+
+**/
+#define MSR_SVSM_CAA  0xc001f000
+
+/**
+  MSR information returned for #MSR_SVSM_CAA
+**/
+typedef union {
+  struct {
+    UINT32    Lower32Bits;
+    UINT32    Upper32Bits;
+  } Bits;
+
+  UINT64    Uint64;
+} MSR_SVSM_CAA_REGISTER;
+
+#endif