[PATCH 04/13] MdePkg/Register/Amd: define GHCB macro for Register GPA structure

["Brijesh Singh" <brijesh.singh@amd.com>]

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3275

An SEV-SNP guest is required to perform the GHCB GPA registration. See
the GHCB specification for further details.

Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Min Xu <min.m.xu@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
 MdePkg/Include/Register/Amd/Fam17Msr.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/MdePkg/Include/Register/Amd/Fam17Msr.h b/MdePkg/Include/Register/Amd/Fam17Msr.h
index cdb8f588ccf8..542e4cdf4782 100644
--- a/MdePkg/Include/Register/Amd/Fam17Msr.h
+++ b/MdePkg/Include/Register/Amd/Fam17Msr.h
@@ -53,6 +53,11 @@ typedef union {
     UINT64  Features:52;
   } GhcbHypervisorFeatures;
 
+  struct {
+    UINT64  Function:12;
+    UINT64  GuestFrameNumber:52;
+  } GhcbGpaRegister;
+
   VOID    *Ghcb;
 
   UINT64  GhcbPhysicalAddress;
@@ -62,6 +67,8 @@ typedef union {
 #define GHCB_INFO_SEV_INFO_GET                      2
 #define GHCB_INFO_CPUID_REQUEST                     4
 #define GHCB_INFO_CPUID_RESPONSE                    5
+#define GHCB_INFO_GHCB_GPA_REGISTER_REQUEST         18
+#define GHCB_INFO_GHCB_GPA_REGISTER_RESPONSE        19
 #define GHCB_HYPERVISOR_FEATURES_REQUEST            128
 #define GHCB_HYPERVISOR_FEATURES_RESPONSE           129
 #define GHCB_INFO_TERMINATE_REQUEST                 256
-- 
2.17.1