From 6ced1e91eff13dae1bfba95734e2b34a73601db2 Mon Sep 17 00:00:00 2001
From: Tom Lendacky <thomas.lendacky@amd.com>
Date: Fri, 8 Mar 2024 07:31:53 -0800
Subject: Ovmfpkg/AmdSvsmLib: Create AmdSvsmLib to handle SVSM related services

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4654

Add initial support for the new AmdSvsmLib library to OvmfPkg. The initial
implementation fully implements the library interfaces.

The SVSM presence check, AmdSvsmIsSvsmPresent(), determines the presence
of an SVSM by checking if an SVSM has been advertised in the SEV-SNP
Secrets Page.

The VMPL API, AmdSvsmSnpGetVmpl(), returns the VMPL level at which OVMF is
currently running.

The CAA API, AmdSvsmSnpGetCaa(), returns the Calling Area Address when an
SVSM is present, 0 otherwise.

The PVALIDATE API, AmdSvsmSnpPvalidate(), copies the PVALIDATE logic from
the BaseMemEncryptSevLib library for the initial implementation. The
BaseMemEncryptSevLib library will be changed to use this new API so that
the decision as to whether the SVSM is needed to perform the operation
can be isolated to this library.

The VMSA API, AmdSvsmSnpVmsaRmpAdjust(), copies the RMPUPDATE logic from
the MpInitLib library for the initial implementation. The MpInitLib
library will be changed to use this new API so that the decision as to
whether the SVSM is needed to perform the operation can be isolated to
this library.

Cc: Anatol Belski <anbelski@linux.microsoft.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jianyong Wu <jianyong.wu@arm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Michael Roth <michael.roth@amd.com>
Cc: Min Xu <min.m.xu@intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
---
 OvmfPkg/AmdSev/AmdSevX64.dsc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'OvmfPkg/AmdSev/AmdSevX64.dsc')

diff --git a/OvmfPkg/AmdSev/AmdSevX64.dsc b/OvmfPkg/AmdSev/AmdSevX64.dsc
index 140c4208f5..a7540bb636 100644
--- a/OvmfPkg/AmdSev/AmdSevX64.dsc
+++ b/OvmfPkg/AmdSev/AmdSevX64.dsc
@@ -204,7 +204,7 @@
 !include OvmfPkg/Include/Dsc/ShellLibs.dsc.inc
 
 [LibraryClasses.common]
-  AmdSvsmLib|UefiCpuPkg/Library/AmdSvsmLibNull/AmdSvsmLibNull.inf
+  AmdSvsmLib|OvmfPkg/Library/AmdSvsmLib/AmdSvsmLib.inf
   BaseCryptLib|CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
   CcExitLib|OvmfPkg/Library/CcExitLib/CcExitLib.inf
   TdxLib|MdePkg/Library/TdxLib/TdxLib.inf
-- 
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