[edk2-devel] [PATCH RFC v2 03/28] MdePkg: Define the GHCB GPA structure

[Brijesh Singh]

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 at linux.ibm.com>
Cc: Min Xu <min.m.xu at intel.com>
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Tom Lendacky <thomas.lendacky at amd.com>
Cc: Jordan Justen <jordan.l.justen at intel.com>
Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
Cc: Laszlo Ersek <lersek at redhat.com>
Cc: Erdem Aktas <erdemaktas at google.com>
Signed-off-by: Brijesh Singh <brijesh.singh at 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 a65d51ab12..e19bd04b6c 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



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