This will be needed so that the AP Jump Table address can be stored for
use by the operating system later, and possibly for other things in the
future.
Signed-off-by: Michael Roth <michael.r...@amd.com>
---
MdePkg/Include/Register/Amd/SnpSecretsPage.h | 56 ++++++++++++++++++++
1 file changed, 56 insertions(+)
create mode 100644 MdePkg/Include/Register/Amd/SnpSecretsPage.h
diff --git a/MdePkg/Include/Register/Amd/SnpSecretsPage.h
b/MdePkg/Include/Register/Amd/SnpSecretsPage.h
new file mode 100644
index 0000000000..3188459150
--- /dev/null
+++ b/MdePkg/Include/Register/Amd/SnpSecretsPage.h
@@ -0,0 +1,56 @@
+/** @file
+Definitions for AMD SEV-SNP Secrets Page
+
+Copyright (c) 2022 AMD Inc. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef SNP_SECRETS_PAGE_H_
+#define SNP_SECRETS_PAGE_H_
+
+//
+// OS-defined area of secrets page
+//
+// As defined by "SEV-ES Guest-Hypervisor Communication Block Standardization",
+// revision 2.01, section 2.7, "SEV-SNP Secrets Page".
+//
+typedef PACKED struct _SNP_SECRETS_OS_AREA {
+ UINT32 Vmpl0MsgSeqNumLo;
+ UINT32 Vmpl1MsgSeqNumLo;
+ UINT32 Vmpl2MsgSeqNumLo;
+ UINT32 Vmpl3MsgSeqNumLo;
+ UINT64 ApJumpTablePa;
+ UINT32 Vmpl0MsgSeqNumHi;
+ UINT32 Vmpl1MsgSeqNumHi;
+ UINT32 Vmpl2MsgSeqNumHi;
+ UINT32 Vmpl3MsgSeqNumHi;
+ UINT8 Reserved2[22];
+ UINT16 Version;
+ UINT8 GuestUsage[32];
+} SNP_SECRETS_OS_AREA;
+
+#define VMPCK_KEY_LEN 32
+
+//
+// SEV-SNP Secrets page
+//
+// As defined by "SEV-SNP Firmware ABI", revision 1.51, section 8.17.2.5,
+// "PAGE_TYPE_SECRETS".
+//
+typedef PACKED struct _SNP_SECRETS_PAGE {
+ UINT32 Version;
+ UINT32 ImiEn : 1,
+ Reserved : 31;
+ UINT32 Fms;
+ UINT32 Reserved2;
+ UINT8 Gosvw[16];
+ UINT8 Vmpck0[VMPCK_KEY_LEN];
+ UINT8 Vmpck1[VMPCK_KEY_LEN];
+ UINT8 Vmpck2[VMPCK_KEY_LEN];
+ UINT8 Vmpck3[VMPCK_KEY_LEN];
+ SNP_SECRETS_OS_AREA OsArea;
+ UINT8 Reserved3[3840];
+} SNP_SECRETS_PAGE;
+
+#endif
--
2.25.1
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