[edk2-devel] [PATCH v1 0/4] Support SMM Relocated SmBase handling

[Gerd Hoffmann]

On Fri, Jan 13, 2023 at 03:17:34PM +0800, Wu, Jiaxin wrote:
> Below serial patches are to support the SMM Relocated SmBase handling.
> To achieve, new hob interface is procuded, and will be consumed by SMM
> CPU driver & SmmCpuFeaturesLib to do SmBase initialization:

Who produces that HOB?  I see only consumers in this patch series.

The patch series doesn't even pass BaseTools/Scripts/PatchCheck.py,
it will surely not pass CI.

> With SMM Base Hob, SMM CPU driver does not need the RSM instruction
> to reload the SMBASE register with the new allocated value in SMBASE
> field each time it exits SMM. SMBASE Register for each processors
> have already been programmed in parallel since the same default
> SMBASE Address(0x30000) is not used, thus the CPUs over-writing
> each other's SMM Save State Area will not happen.

Care to explain how this works?  SMBASE setup has to happen somewhere
(probably in the HOB producer), how does that work without using the
default smbase address?

take care,
  Gerd



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