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Refactor idle process initialization

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This commit is contained in:
Aiken Harris
2026-06-09 23:17:03 +02:00
parent a9202f5b57
commit 6a2a35c008
1 changed files with 16 additions and 27 deletions
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43
xtoskrnl/ke/kprocess.cc
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@@ -56,50 +56,39 @@ XTSTATUS
KE::KProcess::InitializeIdleProcess(IN OUT PKPROCESS Process,
IN PULONG_PTR DirectoryTable)
{
ULONG AffinitySize, MapSize;
PACPI_SYSTEM_INFO SysInfo;
ULONG Cpus, Index;
XTSTATUS Status;
/* Retrieve hardware topology from ACPI */
HL::Acpi::GetSystemInformation(&SysInfo);
/* Get the number of natively installed CPUs */
Cpus = KE::Processor::GetInstalledCpus();
/* Calculate the required size for KAFFINITY_MAP structures */
AffinitySize = (SysInfo->CpuCount + 63) / 64;
MapSize = sizeof(KAFFINITY_MAP) + (AffinitySize * sizeof(KAFFINITY));
/* Align size to the 8-byte boundary */
MapSize = (MapSize + 7) & ~7;
/* Allocate the process-level affinity structure */
Status = MM::Allocator::AllocatePool(NonPagedPool, MapSize, (PVOID*)&Process->Affinity);
/* Allocate and initialize the baseline affinity map for the process */
Status = KE::Affinity::CreateAffinityMap(Cpus, &Process->Affinity);
if(Status != STATUS_SUCCESS)
{
/* Memory allocation failed, return the status code */
/* Affinity map allocation failed, return status code */
return Status;
}
/* Allocate the process-level active processors structure */
Status = MM::Allocator::AllocatePool(NonPagedPool, MapSize, (PVOID*)&Process->ActiveProcessors);
/* Allocate and initialize the dynamic map used to track actively running CPUs */
Status = KE::Affinity::CreateAffinityMap(Cpus, &Process->ActiveProcessors);
if(Status != STATUS_SUCCESS)
{
/* Memory allocation failed, free previously allocated memory and return the status code */
MM::Allocator::FreePool((PVOID)Process->Affinity);
/* Affinity map allocation failed, return status code */
return Status;
}
/* Zero the process-level affinity structures */
RTL::Memory::ZeroMemory(Process->Affinity, MapSize);
RTL::Memory::ZeroMemory(Process->ActiveProcessors, MapSize);
/* Initialize size metadata */
Process->Affinity->Count = (USHORT)AffinitySize;
Process->Affinity->Size = (USHORT)AffinitySize;
Process->ActiveProcessors->Size = (USHORT)AffinitySize;
/* Initialize Idle process */
KE::KProcess::InitializeProcess(Process, 0, DirectoryTable, FALSE);
Process->Quantum = MAXCHAR;
/* Populate the global Idle Process affinity */
for(Index = 0; Index < Cpus; Index++)
{
/* Include every installed hardware thread in the base affinity map */
KE::Affinity::SetProcessorAffinity(Process->Affinity, Index);
}
/* Return success */
return STATUS_SUCCESS;
}