Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: c7a7f09c1dfa8896ccf94be2d8c7c8b420257fec
https://github.com/tianocore/edk2/commit/c7a7f09c1dfa8896ccf94be2d8c7c8b420257fec
Author: YuanhaoXie <[email protected]>
Date: 2023-07-27 (Thu, 27 Jul 2023)
Changed paths:
M UefiCpuPkg/Library/MpInitLib/MpLib.c
Log Message:
-----------
UefiCpuPkg: Decouple the SEV-ES functionality.
The purpose is to fix an issue where an exception occurs at the start
of the DXE phase by applying the following patch series on INTEL-based
systems.
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.
This series of patches makes changes to the way the APs are
initialized and woken up. It removes the 2nd time INIT-SIPI-SIPI and
introduces a special startup signal to wake up APs. These patches also
create a new HOB identified by the mMpHandOffGuid, which stores only the
minimum information required from the PEI phase to the DXE phase.
As a result, the original HOB (mCpuInitMpLibHobGuid) is now used only
as a global variable in the PEI phase and is no longer necessary in the
DXE phase for INTEL-based systems. The AMD SEV-ES related code
still relies on the OldCpuMpData in the DXE phase.
This patch decouple the SEV-ES functionality of assigning CpuMpData to
OldCpuMpData->NewCpuMpData from the Intel logic.
Cc: Eric Dong <[email protected]>
Cc: Rahul Kumar <[email protected]>
Reviewed-by: Tom Lendacky <[email protected]>
Reviewed-by: Ray Ni <[email protected]>
Signed-off-by: Yuanhao Xie <[email protected]>
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