From afa7b97154b3497a364eeccc439a79ae9ed5e1a3 Mon Sep 17 00:00:00 2001
From: Jeff Fan <jeff.fan@intel.com>
Date: Fri, 1 Jul 2016 15:52:40 +0800
Subject: [PATCH] UefiCpuPkg/CpuDxe: StartupAllAPs in parallel mode

SetMemoryAttributes() will sync BSP's MTRRs settings to all APs by StartupAllAPs
service in serial mode. It may caused much performance impact if there are too
much processors in system. This update is to invoke StartupAllAps in parallel
mode. IA32 SDM does suggest to program MTRRs in parallel mode.

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
---
 UefiCpuPkg/CpuDxe/CpuDxe.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.c b/UefiCpuPkg/CpuDxe/CpuDxe.c
index daf97bd4a6..78b2c88095 100644
--- a/UefiCpuPkg/CpuDxe/CpuDxe.c
+++ b/UefiCpuPkg/CpuDxe/CpuDxe.c
@@ -1,7 +1,7 @@
 /** @file
   CPU DXE Module.
 
-  Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2008 - 2016, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
@@ -422,7 +422,7 @@ CpuSetMemoryAttributes (
       MpStatus = MpService->StartupAllAPs (
                               MpService,          // This
                               SetMtrrsFromBuffer, // Procedure
-                              TRUE,               // SingleThread
+                              FALSE,              // SingleThread
                               NULL,               // WaitEvent
                               0,                  // TimeoutInMicrosecsond
                               &MtrrSettings,      // ProcedureArgument
-- 
2.39.2