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Kernel: Add SMP IPI support

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We can now properly initialize all processors without
crashing by sending SMP IPI messages to synchronize memory
between processors.

We now initialize the APs once we have the scheduler running.
This is so that we can process IPI messages from the other
cores.

Also rework interrupt handling a bit so that it's more of a
1:1 mapping. We need to allocate non-sharable interrupts for
IPIs.

This also fixes the occasional hang/crash because all
CPUs now synchronize memory with each other.
This commit is contained in:
Tom 2020-07-06 07:27:22 -06:00 • committed by Andreas Kling
parent dec27e5e6f
commit bc107d0b33
27 changed files with 1236 additions and 627 deletions
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2
Kernel/Process.cpp
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@ -1271,7 +1271,7 @@ int Process::exec(String path, Vector<String> arguments, Vector<String> environm
// We need to enter the scheduler lock before changing the state
// and it will be released after the context switch into that
// thread. We should also still be in our critical section
ASSERT(!g_scheduler_lock.is_locked());
ASSERT(!g_scheduler_lock.own_lock());
ASSERT(Processor::current().in_critical() == 1);
g_scheduler_lock.lock();
current_thread->set_state(Thread::State::Running);