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UefiCpuPkg: Decouple the SEV-ES functionality.

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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 <eric.dong@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Signed-off-by: Yuanhao Xie <yuanhao.xie@intel.com>
This commit is contained in:
YuanhaoXie 2023-07-26 11:55:41 +08:00 committed by Ray Ni
parent 25a6745fe8
commit c7a7f09c1d
1 changed files with 4 additions and 1 deletions
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5
UefiCpuPkg/Library/MpInitLib/MpLib.c
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@ -2160,7 +2160,10 @@ MpInitLibInitialize (
// APs have been wakeup before, just get the CPU Information
// from HOB
//
AmdSevUpdateCpuMpData (CpuMpData);
if (CpuMpData->UseSevEsAPMethod) {
AmdSevUpdateCpuMpData (CpuMpData);
}
CpuMpData->CpuCount = MpHandOff->CpuCount;
CpuMpData->BspNumber = GetBspNumber (MpHandOff);
CpuInfoInHob = (CPU_INFO_IN_HOB *)(UINTN)CpuMpData->CpuInfoInHob;