Reviewed-by: Ray Ni <ray...@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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