[PATCH 04/13] MdePkg/Register/Amd: define GHCB macro for Register 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@...>
Cc: Min Xu <min.m.xu@...>
Cc: Jiewen Yao <jiewen.yao@...>
Cc: Tom Lendacky <thomas.lendacky@...>
Cc: Jordan Justen <jordan.l.justen@...>
Cc: Ard Biesheuvel <ardb+tianocore@...>
Cc: Laszlo Ersek <lersek@...>
Cc: Erdem Aktas <erdemaktas@...>
Cc: Michael D Kinney <michael.d.kinney@...>
Cc: Liming Gao <gaoliming@...>
Cc: Zhiguang Liu <zhiguang.liu@...>
Reviewed-by: Laszlo Ersek <lersek@...>
Signed-off-by: Brijesh Singh <brijesh.singh@...>
---
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

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