[edk2-devel] [PATCH v3 1/5] UefiCpuPkg/SmmBaseHob.h: Add SMM Base HOB Data

[Gerd Hoffmann]

  Hi,

> +#pragma pack(1)
> +typedef struct {
> +  ///
> +  /// Describes the Number of all max supported processors.
> +  ///
> +  UINT64    NumberOfProcessors;
> +  ///
> +  /// Pointer to SmBase address for each Processors.
> +  ///
> +  UINT64    SmBase[];
> +} SMM_BASE_HOB_DATA;
> +#pragma pack()

HOBs are limited to 64k in size.  So this can by design support at most
8191 processors.  Adding such a interface to edk2 doesn't look like a
good idea to me.  It probably is not that far off that we'll hit that
limit given that high-end systems with 1024+ processors exist today.

take care,
  Gerd



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