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

[Wu, Jiaxin]

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:

The Smm Base HOB is used to store the relocated SmBase in
array for each Processors. If gSmmBaseHobGuid produced,
indicate SmBase for each Processors have been relocated.
The SmBase address in hob can be guaranteed the SMRAM state
save areas for all processors do not overlap.

SMM CPU driver will retrieve the SMBASE addresses from SMM Base Hob
and installs the SMI handler at [SMBASE+8000h] for each processor
instead of relocating SMM Base addresses from SMRAM again.

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. This way will save
boot time on multi-core system.

Beside, If gSmmBaseHobGuid found, no need to do the relocation in
SmmCpuFeaturesInitializeProcessor().

Jiaxin Wu (4):
  UefiCpuPkg/SmmBaseHob.h: Add SMM Base HOB Data
  UefiCpuPkg/PiSmmCpuDxeSmm: Consume SMM Base Hob for SmBase info
  UefiCpuPkg/SmmCpuFeaturesLib: Skip to configure SMBASE
  OvmfPkg/SmmCpuFeaturesLib: Skip to configure SMBASE

 .../Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c  |  39 ++++--
 .../SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf        |   4 +
 UefiCpuPkg/Include/Guid/SmmBaseHob.h               |  51 +++++++
 .../Library/SmmCpuFeaturesLib/CpuFeaturesLib.h     |   2 +
 .../SmmCpuFeaturesLib/IntelSmmCpuFeaturesLib.c     |  25 +++-
 .../SmmCpuFeaturesLib/SmmCpuFeaturesLib.inf        |   4 +
 .../SmmCpuFeaturesLib/SmmCpuFeaturesLibStm.inf     |   1 +
 UefiCpuPkg/Library/SmmCpuFeaturesLib/SmmStm.c      |   1 -
 .../StandaloneMmCpuFeaturesLib.inf                 |   4 +
 UefiCpuPkg/PiSmmCpuDxeSmm/CpuS3.c                  |  40 +++++-
 UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c              |  25 +++-
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c         | 155 ++++++++++++++++-----
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h         |  21 ++-
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf       |   1 +
 UefiCpuPkg/UefiCpuPkg.dec                          |   3 +
 15 files changed, 318 insertions(+), 58 deletions(-)
 create mode 100644 UefiCpuPkg/Include/Guid/SmmBaseHob.h

-- 
2.16.2.windows.1



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