Re: [PATCH v3 1/1] UefiCpuPkg/CpuCommonFeaturesLib: Update processor location info

["Ni, Ray" <ray.ni@intel.com>]

When reviewing V2, I only focused on whether the C code change is good.

I am ok that this patch contains not just processor location check logic update, but also updates to comments
that are not related to the location check.

2 minor comments:
1. Change the commit message title to "UefiCpuPkg/CpuCommonFeaturesLib: correct the CPU location check"
2. Update the commit message body to mention the other changes you did to comments.

> -----Original Message-----
> From: Li, Daoxiang <daoxiang.li@intel.com>
> Sent: Wednesday, June 2, 2021 10:25 AM
> To: devel@edk2.groups.io
> Cc: Li, Daoxiang <daoxiang.li@intel.com>; Dong, Eric <eric.dong@intel.com>;
> Ni, Ray <ray.ni@intel.com>; Laszlo Ersek <lersek@redhat.com>; Kumar,
> Rahul1 <rahul1.kumar@intel.com>
> Subject: [PATCH v3 1/1] UefiCpuPkg/CpuCommonFeaturesLib: Update
> processor location info
> 
> From: Daoxiang Li <daoxiang.li@intel.com>
> 
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3424
> 
> Processor location information check needs to updated
> When Core 0 is disabled
> 
> Signed-off-by: Daoxiang Li <daoxiang.li@intel.com>
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Laszlo Ersek <lersek@redhat.com>
> Cc: Rahul Kumar <rahul1.kumar@intel.com>
> ---
>  UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c          | 4 ++--
>  UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c | 4 ++--
>  UefiCpuPkg/Library/CpuCommonFeaturesLib/Ppin.c         | 6 +++---
>  3 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c
> b/UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c
> index e6e5db75917c..6f9685733202 100644
> --- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c
> +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/C1e.c
> @@ -63,9 +63,9 @@ C1eInitialize (
>  {
> 
>    //
> 
>    // The scope of C1EEnable bit in the MSR_NEHALEM_POWER_CTL is
> Package, only program
> 
> -  // MSR_FEATURE_CONFIG for thread 0 core 0 in each package.
> 
> +  // MSR_NEHALEM_POWER_CTL once for each package.
> 
>    //
> 
> -  if ((CpuInfo->ProcessorInfo.Location.Thread != 0) || (CpuInfo-
> >ProcessorInfo.Location.Core != 0)) {
> 
> +  if ((CpuInfo->First.Thread == 0) || (CpuInfo->First.Core == 0)) {
> 
>    return RETURN_SUCCESS;
> 
>    }
> 
> 
> 
> diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c
> b/UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c
> index bb5d983d1f4b..a3a2861cee5b 100644
> --- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c
> +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/MachineCheck.c
> @@ -152,10 +152,10 @@ McaInitialize (
> 
> 
>    //
> 
>    // The scope of MSR_IA32_MC*_CTL/MSR_IA32_MC*_STATUS is package
> for below processor type, only program
> 
> -  // MSR_IA32_MC*_CTL/MSR_IA32_MC*_STATUS for thread 0 core 0 in
> each package.
> 
> +  // MSR_IA32_MC*_CTL/MSR_IA32_MC*_STATUS once for each package.
> 
>    //
> 
>    if (IS_NEHALEM_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo-
> >DisplayModel)) {
> 
> -    if ((CpuInfo->ProcessorInfo.Location.Thread != 0) || (CpuInfo-
> >ProcessorInfo.Location.Core != 0)) {
> 
> +    if ((CpuInfo->First.Thread == 0) || (CpuInfo->First.Core == 0)) {
> 
>        return RETURN_SUCCESS;
> 
>      }
> 
>    }
> 
> diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Ppin.c
> b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Ppin.c
> index 8450c7ea3eaf..3c4c1bc706ba 100644
> --- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Ppin.c
> +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Ppin.c
> @@ -130,10 +130,10 @@ PpinInitialize (
>    // Support function already check the processor which support PPIN
> feature, so this function not need
> 
>    // to check the processor again.
> 
>    //
> 
> -  // The scope of the MSR_IVY_BRIDGE_PPIN_CTL is package level, only
> program MSR_IVY_BRIDGE_PPIN_CTL for
> 
> -  // thread 0 core 0 in each package.
> 
> +  // The scope of the MSR_IVY_BRIDGE_PPIN_CTL is package level, only
> program MSR_IVY_BRIDGE_PPIN_CTL
> 
> +  // once for each package.
> 
>    //
> 
> -  if ((CpuInfo->ProcessorInfo.Location.Thread != 0) || (CpuInfo-
> >ProcessorInfo.Location.Core != 0)) {
> 
> +  if ((CpuInfo->First.Thread == 0) || (CpuInfo->First.Core == 0)) {
> 
>      return RETURN_SUCCESS;
> 
>    }
> 
> 
> 
> --
> 2.28.0.windows.1