From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=209.132.183.28; helo=mx1.redhat.com; envelope-from=lersek@redhat.com; receiver=edk2-devel@lists.01.org Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) (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 89999202E53A8 for ; Tue, 12 Feb 2019 18:43:44 -0800 (PST) Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BC65E63647; Wed, 13 Feb 2019 02:43:43 +0000 (UTC) Received: from lacos-laptop-7.usersys.redhat.com (ovpn-120-136.rdu2.redhat.com [10.10.120.136]) by smtp.corp.redhat.com (Postfix) with ESMTP id A43FB10021B6; Wed, 13 Feb 2019 02:43:42 +0000 (UTC) To: Eric Dong , edk2-devel@lists.01.org References: <20190213020405.18800-1-eric.dong@intel.com> <20190213020405.18800-3-eric.dong@intel.com> From: Laszlo Ersek Message-ID: <92ad79fa-9c7a-234b-8f9b-739b37b5aed0@redhat.com> Date: Wed, 13 Feb 2019 03:43:41 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20190213020405.18800-3-eric.dong@intel.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Wed, 13 Feb 2019 02:43:43 +0000 (UTC) Subject: Re: [Patch 2/3] UefiCpuPkg/RegisterCpuFeaturesLib: Optimize PCD PcdCpuFeaturesUserConfiguration. X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Feb 2019 02:43:44 -0000 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit On 02/13/19 03:04, Eric Dong wrote: > In current implementation, PCD PcdCpuFeaturesUserConfiguration used as > user enabled CPU features list. It is initialzied in platform driver > and as an input for CpuFeatures driver. PCD PcdCpuFeaturesSetting used > as an output for the final enabled CPU features list. For now, > PcdCpuFeaturesUserConfiguration is only used as an input and > PcdCpuFeaturesSetting only used as an output. > > This change merge PcdCpuFeaturesUserConfiguration into > PcdCpuFeaturesSetting. > Use PcdCpuFeaturesSetting as input for the user input feature setting > Use PcdCpuFeaturesSetting as output for the final CPU feature setting > > BZ:https://bugzilla.tianocore.org/show_bug.cgi?id=1375 > > Cc: Ray Ni > Cc: Laszlo Ersek > Contributed-under: TianoCore Contribution Agreement 1.1 > Signed-off-by: Eric Dong > --- > .../RegisterCpuFeaturesLib/CpuFeaturesInitialize.c | 37 ++++++++++++---------- > .../DxeRegisterCpuFeaturesLib.inf | 1 - > .../PeiRegisterCpuFeaturesLib.inf | 1 - > .../RegisterCpuFeaturesLib/RegisterCpuFeatures.h | 1 - > UefiCpuPkg/UefiCpuPkg.dec | 7 ++-- > 5 files changed, 22 insertions(+), 25 deletions(-) > > diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c > index bae92b89a6..4ebd0025b4 100644 > --- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c > +++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c > @@ -54,41 +54,41 @@ SetSettingPcd ( > } > > /** > - Worker function to get PcdCpuFeaturesSupport. > + Worker function to get PcdCpuFeaturesSetting. > > @return The pointer to CPU feature bits mask buffer. > **/ > UINT8 * > -GetSupportPcd ( > +GetSettingPcd ( > VOID > ) > { > - UINT8 *SupportBitMask; > + UINT8 *SettingBitMask; > > - SupportBitMask = AllocateCopyPool ( > - PcdGetSize (PcdCpuFeaturesSupport), > - PcdGetPtr (PcdCpuFeaturesSupport) > + SettingBitMask = AllocateCopyPool ( > + PcdGetSize (PcdCpuFeaturesSetting), > + PcdGetPtr (PcdCpuFeaturesSetting) > ); (1) The indentation of the AllocateCopyPool() arguments is not idiomatic. I suggest fixing that, even if it means diverging from the old code. > - ASSERT (SupportBitMask != NULL); > + ASSERT (SettingBitMask != NULL); > > - return SupportBitMask; > + return SettingBitMask; > } > > /** > - Worker function to get PcdCpuFeaturesUserConfiguration. > + Worker function to get PcdCpuFeaturesSupport. > > @return The pointer to CPU feature bits mask buffer. > **/ > UINT8 * > -GetConfigurationPcd ( > +GetSupportPcd ( > VOID > ) > { > UINT8 *SupportBitMask; > > SupportBitMask = AllocateCopyPool ( > - PcdGetSize (PcdCpuFeaturesUserConfiguration), > - PcdGetPtr (PcdCpuFeaturesUserConfiguration) > + PcdGetSize (PcdCpuFeaturesSupport), > + PcdGetPtr (PcdCpuFeaturesSupport) > ); > ASSERT (SupportBitMask != NULL); > > @@ -287,7 +287,6 @@ CpuInitDataInitialize ( > // Get support and configuration PCDs > // > CpuFeaturesData->SupportPcd = GetSupportPcd (); > - CpuFeaturesData->ConfigurationPcd = GetConfigurationPcd (); > } > > /** > @@ -595,6 +594,9 @@ AnalysisProcessorFeatures ( > CPU_FEATURE_DEPENDENCE_TYPE AfterDep; > CPU_FEATURE_DEPENDENCE_TYPE NoneNeibBeforeDep; > CPU_FEATURE_DEPENDENCE_TYPE NoneNeibAfterDep; > + UINT8 *ConfigurationPcd; > + > + ConfigurationPcd = NULL; > > CpuFeaturesData = GetCpuFeaturesData (); > CpuFeaturesData->CapabilityPcd = AllocatePool (CpuFeaturesData->BitMaskSize); > @@ -610,10 +612,13 @@ AnalysisProcessorFeatures ( > // > // Calculate the last setting > // > - > CpuFeaturesData->SettingPcd = AllocateCopyPool (CpuFeaturesData->BitMaskSize, CpuFeaturesData->CapabilityPcd); > ASSERT (CpuFeaturesData->SettingPcd != NULL); > - SupportedMaskAnd (CpuFeaturesData->SettingPcd, CpuFeaturesData->ConfigurationPcd); > + ConfigurationPcd = GetSettingPcd (); > + SupportedMaskAnd (CpuFeaturesData->SettingPcd, ConfigurationPcd); > + if (ConfigurationPcd != NULL) { > + FreePool (ConfigurationPcd); > + } (2) Why is it necessary to set ConfigurationPcd to NULL at the beginning of the function? And why is the NULL check necessary here? GetSettingPcd() can never return NULL. (I don't just mean the ASSERT, but also the fact that we pass ConfigurationPcd to SupportedMaskAnd() without checking ConfigurationPcd for NULL.) > > // > // Save PCDs and display CPU PCDs > @@ -643,8 +648,6 @@ AnalysisProcessorFeatures ( > } > DEBUG ((DEBUG_INFO, "PcdCpuFeaturesSupport:\n")); > DumpCpuFeatureMask (CpuFeaturesData->SupportPcd); > - DEBUG ((DEBUG_INFO, "PcdCpuFeaturesUserConfiguration:\n")); > - DumpCpuFeatureMask (CpuFeaturesData->ConfigurationPcd); > DEBUG ((DEBUG_INFO, "PcdCpuFeaturesCapability:\n")); > DumpCpuFeatureMask (CpuFeaturesData->CapabilityPcd); > DEBUG ((DEBUG_INFO, "PcdCpuFeaturesSetting:\n")); > diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.inf b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.inf > index 362e0c6cd1..b7dc70808f 100644 > --- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.inf > +++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/DxeRegisterCpuFeaturesLib.inf > @@ -56,7 +56,6 @@ > [Pcd] > gUefiCpuPkgTokenSpaceGuid.PcdCpuS3DataAddress ## CONSUMES > gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesSupport ## CONSUMES > - gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesUserConfiguration ## CONSUMES > gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesCapability ## PRODUCES > gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesSetting ## PRODUCES > > diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.inf b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.inf > index f3907e25d3..cd69721a2d 100644 > --- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.inf > +++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/PeiRegisterCpuFeaturesLib.inf > @@ -57,7 +57,6 @@ > [Pcd] > gUefiCpuPkgTokenSpaceGuid.PcdCpuS3DataAddress ## CONSUMES > gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesSupport ## CONSUMES > - gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesUserConfiguration ## CONSUMES > gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesCapability ## PRODUCES > gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesSetting ## PRODUCES > > diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h > index 21dd5773a6..3e0a342fd1 100644 > --- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h > +++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h > @@ -83,7 +83,6 @@ typedef struct { > CPU_FEATURES_INIT_ORDER *InitOrder; > UINT8 *SupportPcd; > UINT8 *CapabilityPcd; > - UINT8 *ConfigurationPcd; > UINT8 *SettingPcd; > > UINT32 NumberOfCpus; > diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec > index cb05fa2660..793490872f 100644 > --- a/UefiCpuPkg/UefiCpuPkg.dec > +++ b/UefiCpuPkg/UefiCpuPkg.dec > @@ -261,10 +261,6 @@ > # @Prompt SMM CPU Synchronization Method. > gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmSyncMode|0x00|UINT8|0x60000014 > > - ## Specifies user's desired settings for enabling/disabling processor features. > - # @Prompt User settings for enabling/disabling processor features. > - gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesUserConfiguration|{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}|VOID*|0x00000017 > - > ## Specifies the On-demand clock modulation duty cycle when ACPI feature is enabled. > # @Prompt The encoded values for target duty cycle modulation. > # @ValidRange 0x80000001 | 0 - 15 > @@ -292,7 +288,8 @@ > # @ValidList 0x80000001 | 0 > gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesCapability|{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}|VOID*|0x00000018 > > - ## Specifies actual settings for processor features, each bit corresponding to a specific feature. > + ## As input, specifies user's desired settings for enabling/disabling processor features. > + ## As output, specifies actual settings for processor features, each bit corresponding to a specific feature. > # @Prompt Actual processor feature settings. (3) Shouldn't you update @Prompt as well? > # @ValidList 0x80000001 | 0 > gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesSetting|{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}|VOID*|0x00000019 > Thanks Laszlo