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UefiCpuPkg/MpInitLib: Add support for multiple HOBs to SaveCpuMpData()

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Add support for splitting Hand-Off data into multiple HOBs.
This is required for VMs with thousands of CPUs.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20240222160106.686484-6-kraxel@redhat.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
[lersek@redhat.com: define one local variable per line [Ray]]
This commit is contained in:
Gerd Hoffmann 2024-02-22 17:01:05 +01:00 committed by mergify[bot]
parent c8e77454b5
commit 5e09b5d6d7
1 changed files with 29 additions and 17 deletions
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46
UefiCpuPkg/Library/MpInitLib/PeiMpLib.c
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@ -126,35 +126,47 @@ SaveCpuMpData (
IN CPU_MP_DATA *CpuMpData
)
{
UINT32 MaxCpusPerHob;
UINT32 CpusInHob;
UINT64 Data64;
UINTN Index;
UINT32 Index;
UINT32 HobBase;
CPU_INFO_IN_HOB *CpuInfoInHob;
MP_HAND_OFF *MpHandOff;
UINTN MpHandOffSize;
MaxCpusPerHob = (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE) - sizeof (MP_HAND_OFF)) / sizeof (PROCESSOR_HAND_OFF);
//
// When APs are in a state that can be waken up by a store operation to a memory address,
// report the MP_HAND_OFF data for DXE to use.
//
CpuInfoInHob = (CPU_INFO_IN_HOB *)(UINTN)CpuMpData->CpuInfoInHob;
MpHandOffSize = sizeof (MP_HAND_OFF) + sizeof (PROCESSOR_HAND_OFF) * CpuMpData->CpuCount;
MpHandOff = (MP_HAND_OFF *)BuildGuidHob (&mMpHandOffGuid, MpHandOffSize);
ASSERT (MpHandOff != NULL);
ZeroMem (MpHandOff, MpHandOffSize);
MpHandOff->ProcessorIndex = 0;
CpuInfoInHob = (CPU_INFO_IN_HOB *)(UINTN)CpuMpData->CpuInfoInHob;
MpHandOff->CpuCount = CpuMpData->CpuCount;
if (CpuMpData->ApLoopMode != ApInHltLoop) {
MpHandOff->StartupSignalValue = MP_HAND_OFF_SIGNAL;
MpHandOff->WaitLoopExecutionMode = sizeof (VOID *);
}
for (Index = 0; Index < CpuMpData->CpuCount; Index++) {
if (Index % MaxCpusPerHob == 0) {
HobBase = Index;
CpusInHob = MIN (CpuMpData->CpuCount - HobBase, MaxCpusPerHob);
for (Index = 0; Index < MpHandOff->CpuCount; Index++) {
MpHandOff->Info[Index].ApicId = CpuInfoInHob[Index].ApicId;
MpHandOff->Info[Index].Health = CpuInfoInHob[Index].Health;
MpHandOffSize = sizeof (MP_HAND_OFF) + sizeof (PROCESSOR_HAND_OFF) * CpusInHob;
MpHandOff = (MP_HAND_OFF *)BuildGuidHob (&mMpHandOffGuid, MpHandOffSize);
ASSERT (MpHandOff != NULL);
ZeroMem (MpHandOff, MpHandOffSize);
MpHandOff->ProcessorIndex = HobBase;
MpHandOff->CpuCount = CpusInHob;
if (CpuMpData->ApLoopMode != ApInHltLoop) {
MpHandOff->StartupSignalValue = MP_HAND_OFF_SIGNAL;
MpHandOff->WaitLoopExecutionMode = sizeof (VOID *);
}
}
MpHandOff->Info[Index-HobBase].ApicId = CpuInfoInHob[Index].ApicId;
MpHandOff->Info[Index-HobBase].Health = CpuInfoInHob[Index].Health;
if (CpuMpData->ApLoopMode != ApInHltLoop) {
MpHandOff->Info[Index].StartupSignalAddress = (UINT64)(UINTN)CpuMpData->CpuData[Index].StartupApSignal;
MpHandOff->Info[Index].StartupProcedureAddress = (UINT64)(UINTN)&CpuMpData->CpuData[Index].ApFunction;
MpHandOff->Info[Index-HobBase].StartupSignalAddress = (UINT64)(UINTN)CpuMpData->CpuData[Index].StartupApSignal;
MpHandOff->Info[Index-HobBase].StartupProcedureAddress = (UINT64)(UINTN)&CpuMpData->CpuData[Index].ApFunction;
}
}