From: Tom Lendacky <thomas.lendacky@amd.com>
Date: Wed, 12 Aug 2020 20:21:35 +0000 (-0500)
Subject: MdePkg: Add the MSR definition for the GHCB register
X-Git-Tag: edk2-stable202008~96
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=a80e887819ac27800551811e2943181ad811effa

MdePkg: Add the MSR definition for the GHCB register

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198

For SEV-ES, the GHCB page address is stored in the GHCB MSR register
(0xc0010130). Define the register and the format used for register
during GHCB protocol negotiation.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
---

diff --git a/MdePkg/Include/Register/Amd/Fam17Msr.h b/MdePkg/Include/Register/Amd/Fam17Msr.h
index 6ef45a9b21..e4db09c518 100644
--- a/MdePkg/Include/Register/Amd/Fam17Msr.h
+++ b/MdePkg/Include/Register/Amd/Fam17Msr.h
@@ -17,6 +17,52 @@
 #ifndef __FAM17_MSR_H__
 #define __FAM17_MSR_H__
 
+/**
+  Secure Encrypted Virtualization - Encrypted State (SEV-ES) GHCB register
+
+**/
+#define MSR_SEV_ES_GHCB                    0xc0010130
+
+/**
+  MSR information returned for #MSR_SEV_ES_GHCB
+**/
+typedef union {
+  struct {
+    UINT32  Function:12;
+    UINT32  Reserved1:20;
+    UINT32  Reserved2:32;
+  } GhcbInfo;
+
+  struct {
+    UINT8   Reserved[3];
+    UINT8   SevEncryptionBitPos;
+    UINT16  SevEsProtocolMin;
+    UINT16  SevEsProtocolMax;
+  } GhcbProtocol;
+
+  struct {
+    UINT32  Function:12;
+    UINT32  ReasonCodeSet:4;
+    UINT32  ReasonCode:8;
+    UINT32  Reserved1:8;
+    UINT32  Reserved2:32;
+  } GhcbTerminate;
+
+  VOID    *Ghcb;
+
+  UINT64  GhcbPhysicalAddress;
+} MSR_SEV_ES_GHCB_REGISTER;
+
+#define GHCB_INFO_SEV_INFO                 1
+#define GHCB_INFO_SEV_INFO_GET             2
+#define GHCB_INFO_CPUID_REQUEST            4
+#define GHCB_INFO_CPUID_RESPONSE           5
+#define GHCB_INFO_TERMINATE_REQUEST        256
+
+#define GHCB_TERMINATE_GHCB                0
+#define GHCB_TERMINATE_GHCB_GENERAL        0
+#define GHCB_TERMINATE_GHCB_PROTOCOL       1
+
 /**
   Secure Encrypted Virtualization (SEV) status register