Reviewed-by: Ray Ni <Ray.ni@intel.com>
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Yuanhao Xie
> Sent: Wednesday, June 28, 2023 4:47 PM
> To: devel@edk2.groups.io
> Subject: [edk2-devel] [Patch V4 0/5] Eliminate the second INIT-SIPI-SIPI
> sequence
>
> To speed up MP initialization, this set of patches replaces the
> time-consuming init-sipi-sipi process in the DXE phase. Instead,
> a start-up signal is used to wake up the APs and switch context
> from the PEI phase to the DXE phase. This optimization is
> effective when both PEI and DXE operate in the same bit mode.
> The current HOB characterized by mCpuInitMpLibHobGuid has
> two purposes:
> Acting as a global variable for the PEI phase.
> Transferring information from the PEI phase to the DXE phase.
> This series of patches creates a new HOB specifically designed
> to transfer only the minimal necessary information
> (MpHandoff structure) from the PEI phase to the DXE phase.
>
> YuanhaoXie (5):
> UefiCpuPkg: Refactor the logic for placing APs in HltLoop.
> UefiCpuPkg: Refactor the logic for placing APs in Mwait/Runloop.
> UefiCpuPkg: Create MpHandOff.
> UefiCpuPkg: ApWakeupFunction directly use CpuMpData.
> UefiCpuPkg: Eliminate the second INIT-SIPI-SIPI sequence.
>
> UefiCpuPkg/Library/MpInitLib/AmdSev.c | 17 +++++++++++++++++
> UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf | 1 +
> UefiCpuPkg/Library/MpInitLib/Ia32/MpFuncs.nasm | 4 ++--
> UefiCpuPkg/Library/MpInitLib/MpHandOff.h | 47
> +++++++++++++++++++++++++++++++++++++++++++++++
> UefiCpuPkg/Library/MpInitLib/MpLib.c | 345
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> ++++++++++++++++++++-----------------------------------------------------------------
> UefiCpuPkg/Library/MpInitLib/MpLib.h | 28
> ++++++++++++++++++++++++++++
> UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf | 2 +-
> UefiCpuPkg/Library/MpInitLib/PeiMpLib.c | 32
> +++++++++++++++++++++++++++++++-
> UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm | 3 +--
> 9 files changed, 408 insertions(+), 71 deletions(-)
> create mode 100644 UefiCpuPkg/Library/MpInitLib/MpHandOff.h
>
> --
> 2.36.1.windows.1
>
>
>
>
>
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