From 020cc9e2e7053bb62247b0babbbe80cb855592e5 Mon Sep 17 00:00:00 2001
From: YuanhaoXie <yuanhao.xie@intel.com>
Date: Tue, 22 Aug 2023 09:52:14 +0800
Subject: [PATCH] OvmfPkg: Disable PcdFirstTimeWakeUpAPsBySipi

Disable PcdFirstTimeWakeUpAPsBySipi for IntelTdx, Microvm, and Xen to
preserve the original execution of INIT-SIPI-SIPI.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Yuanhao Xie <yuanhao.xie@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
---
 OvmfPkg/IntelTdx/IntelTdxX64.dsc | 8 ++++++++
 OvmfPkg/Microvm/MicrovmX64.dsc   | 8 ++++++++
 OvmfPkg/OvmfXen.dsc              | 8 ++++++++
 3 files changed, 24 insertions(+)

diff --git a/OvmfPkg/IntelTdx/IntelTdxX64.dsc b/OvmfPkg/IntelTdx/IntelTdxX64.dsc
index 193657ff2d..80b0558c3f 100644
--- a/OvmfPkg/IntelTdx/IntelTdxX64.dsc
+++ b/OvmfPkg/IntelTdx/IntelTdxX64.dsc
@@ -463,6 +463,14 @@
   # Point to the MdeModulePkg/Application/UiApp/UiApp.inf
   gEfiMdeModulePkgTokenSpaceGuid.PcdBootManagerMenuFile|{ 0x21, 0xaa, 0x2c, 0x46, 0x14, 0x76, 0x03, 0x45, 0x83, 0x6e, 0x8a, 0xb6, 0xf4, 0x66, 0x23, 0x31 }
 
+  #
+  # PcdFirstTimeWakeUpAPsBySipi determines whether to employ
+  # SIPI instead of the INIT-SIPI-SIPI sequence during APs
+  # initialization. Deactivate this parameter to preserve
+  # the original execution of INIT-SIPI-SIPI.
+  #
+  gUefiCpuPkgTokenSpaceGuid.PcdFirstTimeWakeUpAPsBySipi|FALSE
+
 ################################################################################
 #
 # Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
diff --git a/OvmfPkg/Microvm/MicrovmX64.dsc b/OvmfPkg/Microvm/MicrovmX64.dsc
index 2f75856393..d2ef1e00a5 100644
--- a/OvmfPkg/Microvm/MicrovmX64.dsc
+++ b/OvmfPkg/Microvm/MicrovmX64.dsc
@@ -566,6 +566,14 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdSerialPciDeviceInfo|{0xFF}
   gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterBase|0x3f8
 
+  #
+  # PcdFirstTimeWakeUpAPsBySipi determines whether to employ
+  # SIPI instead of the INIT-SIPI-SIPI sequence during APs
+  # initialization. Deactivate this parameter to preserve
+  # the original execution of INIT-SIPI-SIPI.
+  #
+  gUefiCpuPkgTokenSpaceGuid.PcdFirstTimeWakeUpAPsBySipi|FALSE
+
 ################################################################################
 #
 # Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform
diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc
index 210578c1d7..dcb99d1f0b 100644
--- a/OvmfPkg/OvmfXen.dsc
+++ b/OvmfPkg/OvmfXen.dsc
@@ -458,6 +458,14 @@
   # We populate DXE IPL tables with 1G pages preferably on Xen
   gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable|TRUE
 
+  #
+  # PcdFirstTimeWakeUpAPsBySipi determines whether to employ
+  # SIPI instead of the INIT-SIPI-SIPI sequence during APs
+  # initialization. Deactivate this parameter to preserve
+  # the original execution of INIT-SIPI-SIPI.
+  #
+  gUefiCpuPkgTokenSpaceGuid.PcdFirstTimeWakeUpAPsBySipi|FALSE
+
 ################################################################################
 #
 # Pcd Dynamic Section - list of all EDK II PCD Entries defined by this Platform