From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: mx.groups.io; dkim=missing; spf=fail (domain: intel.com, ip: , mailfrom: eric.dong@intel.com) Received: from mga09.intel.com (mga09.intel.com []) by groups.io with SMTP; Fri, 19 Jul 2019 00:28:21 -0700 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Jul 2019 00:28:21 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,281,1559545200"; d="scan'208";a="170828888" Received: from ydong10-win10.ccr.corp.intel.com ([10.239.158.133]) by orsmga003.jf.intel.com with ESMTP; 19 Jul 2019 00:28:19 -0700 From: "Dong, Eric" To: devel@edk2.groups.io Cc: Ray Ni , Laszlo Ersek , Chandana Kumar , Star Zeng Subject: [Patch 5/5] UefiCpuPkg/RegisterCpuFeaturesLib: Start all processors simultaneously. Date: Fri, 19 Jul 2019 15:28:10 +0800 Message-Id: <20190719072811.6352-6-eric.dong@intel.com> X-Mailer: git-send-email 2.21.0.windows.1 In-Reply-To: <20190719072811.6352-1-eric.dong@intel.com> References: <20190719072811.6352-1-eric.dong@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1973 For semaphore type register, it required all processors to do the task at the same time. Current logic begins BSP's task after all APs have finished their tasks. This will caused set semaphore task hang if semaphore has package level type. This patch use new EDKII_PEI_MP_SERVICES2_PPI to start all processors at the same time to fix the potential hang issue. Cc: Ray Ni Cc: Laszlo Ersek Cc: Chandana Kumar Cc: Star Zeng Signed-off-by: Eric Dong --- .../PeiRegisterCpuFeaturesLib.c | 62 ++++++++++++++----- .../PeiRegisterCpuFeaturesLib.inf | 1 + 2 files changed, 47 insertions(+), 16 deletions(-) diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c index 8ad5a40e5a..9ed0fbf381 100644 --- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c +++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.c @@ -12,6 +12,8 @@ #include #include #include +#include + #include "RegisterCpuFeatures.h" #define REGISTER_CPU_FEATURES_GUID \ @@ -180,6 +182,48 @@ StartupAPsWorker ( ASSERT_EFI_ERROR (Status); } +/** + Worker function to execute a caller provided function on all enabled APs. + + @param[in] Procedure A pointer to the function to be run on + enabled APs of the system. + @param[in] MpEvent The Event used to sync the result. + +**/ +VOID +StartupCPUsWorker ( + IN EFI_AP_PROCEDURE Procedure + ) +{ + EFI_STATUS Status; + EDKII_PEI_MP_SERVICES2_PPI *CpuMp2Ppi; + CPU_FEATURES_DATA *CpuFeaturesData; + + CpuFeaturesData = GetCpuFeaturesData (); + + // + // Get MP Services2 Ppi + // + Status = PeiServicesLocatePpi ( + &gEdkiiPeiMpServices2PpiGuid, + 0, + NULL, + (VOID **)&CpuMp2Ppi + ); + ASSERT_EFI_ERROR (Status); + + // + // Wakeup all APs for data collection. + // + Status = CpuMp2Ppi->StartupAllCPUs ( + CpuMp2Ppi, + Procedure, + 0, + CpuFeaturesData + ); + ASSERT_EFI_ERROR (Status); +} + /** Worker function to switch the requested AP to be the BSP from that point onward. @@ -267,23 +311,9 @@ CpuFeaturesInitialize ( CpuFeaturesData->BspNumber = OldBspNumber; // - // Known limitation: In PEI phase, CpuFeatures driver not - // support async mode execute tasks. So semaphore type - // register can't been used for this instance, must use - // DXE type instance. - // - - if (CpuFeaturesData->NumberOfCpus > 1) { - // - // Wakeup all APs for programming. - // - StartupAPsWorker (SetProcessorRegister, NULL); - } - - // - // Programming BSP + // Start to program register for all CPUs. // - SetProcessorRegister (CpuFeaturesData); + StartupCPUsWorker (SetProcessorRegister); // // Switch to new BSP if required diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.inf b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.inf index 63091dfeb8..61f922bf63 100644 --- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.inf +++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.inf @@ -46,6 +46,7 @@ [Ppis] gEfiPeiMpServicesPpiGuid ## CONSUMES + gEdkiiPeiMpServices2PpiGuid ## CONSUMES [Pcd] gUefiCpuPkgTokenSpaceGuid.PcdCpuS3DataAddress ## CONSUMES -- 2.21.0.windows.1