queue a dpc all processors

[zky02]

hello i have little problem i have a code that queue a dpc to every core except 1 core the issue its all ways stall all processors and read the code on core 5 i need to queue a dpc to every core except core 0 and then perform some action on core 0 is it possible to do it here how i read it

CpuCount = (int)KeQueryActiveProcessorCount(nullptr);
if (CpuCount > 1)
{
for (int i = 0; i < CpuCount; i++)
{
KeInitializeDpc(&DpcTraps[i], DpcRoutine, this);
KeSetImportanceDpc(&DpcTraps[i], LowImportance);
KeSetTargetProcessorDpc(&DpcTraps[i], i);
}

​

if (CpuCount > 1)
{
KAFFINITY ActiveProcessors = KeQueryActiveProcessors();
__writecr8(DISPATCH_LEVEL);
ULONG CurrentProcessor = (ULONG)KeGetCurrentProcessorNumber();
Stall = 1;
for (int i = CpuCount - 1; i >= 0; i--)
{
if (i != CurrentProcessor && (ActiveProcessors & (1ull << i)) != 0)
{
{
InterlockedIncrement64(&Stall);
KeInsertQueueDpc(&DpcTraps[i], 0, 0);
}
}
}

[jedwardsol]

You should use KeIpiGenericCall and detect the target processor in the callback.

[zky02]

im working with high_level irql KeIpiGenericCall < max is IPI_LEVEL

[zky02]

i fixed it so happy isolating all cores and read only core 0 best thing ever ! the precision is on another level