From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=192.55.52.115; helo=mga14.intel.com; envelope-from=ruiyu.ni@intel.com; receiver=edk2-devel@lists.01.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 2812F2236BA90 for ; Fri, 5 Jan 2018 01:03:46 -0800 (PST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Jan 2018 01:08:52 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,317,1511856000"; d="scan'208";a="19216500" Received: from ray-dev.ccr.corp.intel.com ([10.239.9.19]) by fmsmga001.fm.intel.com with ESMTP; 05 Jan 2018 01:08:52 -0800 From: Ruiyu Ni To: edk2-devel@lists.01.org Date: Fri, 5 Jan 2018 17:08:50 +0800 Message-Id: <20180105090850.232768-1-ruiyu.ni@intel.com> X-Mailer: git-send-email 2.15.1.windows.2 Subject: [PATCH] UefiCpuPkg/MpInitLib: Fix a bug that AP enters timer INT handler X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Jan 2018 09:03:47 -0000 When SourceLevelDebug is enabled, AP randomly executes the DXECORE timer handler logic. The root cause is the interrupts are not masked in AP wake up procedure. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ruiyu Ni Cc: Jeff Fan --- UefiCpuPkg/Library/MpInitLib/MpLib.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c index 0c2058a7b0..1a6cdb678e 100644 --- a/UefiCpuPkg/Library/MpInitLib/MpLib.c +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c @@ -1,7 +1,7 @@ /** @file CPU MP Initialize Library common functions. - Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.
+ Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.
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 @@ -582,6 +582,10 @@ ApWakeupFunction ( // We need to re-initialize them at here // ProgramVirtualWireMode (); + // + // Mask the LINT0 and LINT1 so that AP doesn't enter the system timer interrupt handler. + // + DisableLvtInterrupts (); SyncLocalApicTimerSetting (CpuMpData); CurrentApicMode = GetApicMode (); -- 2.15.1.windows.2