Re: [PATCH v4 2/5] UefiCpuPkg/SmmBaseHob.h: Add SMM Base HOB Data

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

Gerd,
That requires changing PI spec and all HOB consuming logic.
But if you have a simple idea, please advise.

Thanks,
Ray

> -----Original Message-----
> From: Gerd Hoffmann <kraxel@redhat.com>
> Sent: Friday, February 10, 2023 7:24 PM
> To: Wu, Jiaxin <jiaxin.wu@intel.com>
> Cc: devel@edk2.groups.io; Dong, Eric <eric.dong@intel.com>; Ni, Ray
> <ray.ni@intel.com>; Zeng, Star <star.zeng@intel.com>; Laszlo Ersek
> <lersek@redhat.com>; Kumar, Rahul R <rahul.r.kumar@intel.com>
> Subject: Re: [PATCH v4 2/5] UefiCpuPkg/SmmBaseHob.h: Add SMM Base HOB
> Data
> 
>   Hi,
> 
> > +#pragma pack(1)
> > +typedef struct {
> > +  ///
> > +  /// CpuIndex tells which CPU range this specific HOB instance described.
> > +  /// If CpuIndex is set to 0, it indicats the HOB describes the CPU from 0 to
> > +  /// NumberOfCpus - 1. The HOB list may contains multiple this HOB
> instances.
> > +  /// Each HOB instances describe the information for CPU from CpuIndex to
> > +  /// CpuIndex + NumberOfCpus - 1. The instance order in the HOB list is
> random
> > +  /// so consumer can not assume the CpuIndex of first instance is 0.
> > +  ///
> > +  UINT32    CpuIndex;
> > +  ///
> > +  /// Describes the Number of all max supported processors.
> > +  ///
> > +  UINT32    NumberOfProcessors;
> > +  ///
> > +  /// Pointer to SmBase address for each Processors.
> > +  ///
> > +  UINT64    SmBase[1];
> > +} SMM_BASE_HOB_DATA;
> > +#pragma pack()
> 
> No generic chunked hobs as suggested/discussed on v3 of this series?
> Why not?
> 
> take care,
>   Gerd