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Kernel: Initialize threading and process management earlier

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This re-arranges the order of how things are initialized so that we
try to initialize process and thread management earlier. This is
neccessary because a lot of the code uses the Lock class, which really
needs to have a running scheduler in place so that we can properly
preempt.

This also enables us to potentially initialize some things in parallel.
This commit is contained in:
Tom 2021-07-08 19:37:36 -06:00 • committed by Andreas Kling
parent c2792212f4
commit 6938be00f1
4 changed files with 45 additions and 33 deletions
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54
Kernel/init.cpp
View file

@ -142,39 +142,21 @@ extern "C" [[noreturn]] UNMAP_AFTER_INIT void init()
InterruptManagement::initialize();
ACPI::initialize();
// Initialize the PCI Bus as early as possible, for early boot (PCI based) serial logging
SysFSComponentRegistry::initialize();
__stack_chk_guard = get_fast_random<u32>();
ProcFSComponentRegistry::initialize();
PCI::initialize();
PCISerialDevice::detect();
VirtualFileSystem::initialize();
dmesgln("Starting SerenityOS...");
Thread::initialize();
Process::initialize();
TimeManagement::initialize(0);
__stack_chk_guard = get_fast_random<u32>();
NullDevice::initialize();
if (!get_serial_debug())
(void)SerialDevice::must_create(0).leak_ref();
(void)SerialDevice::must_create(1).leak_ref();
(void)SerialDevice::must_create(2).leak_ref();
(void)SerialDevice::must_create(3).leak_ref();
VMWareBackdoor::the(); // don't wait until first mouse packet
HIDManagement::initialize();
Thread::initialize();
Process::initialize();
Scheduler::initialize();
WorkQueue::initialize();
dmesgln("Starting SerenityOS...");
{
RefPtr<Thread> init_stage2_thread;
Process::create_kernel_process(init_stage2_thread, "init_stage2", init_stage2, nullptr);
Process::create_kernel_process(init_stage2_thread, "init_stage2", init_stage2, nullptr, THREAD_AFFINITY_DEFAULT, Process::RegisterProcess::No);
// We need to make sure we drop the reference for init_stage2_thread
// before calling into Scheduler::start, otherwise we will have a
// dangling Thread that never gets cleaned up
@ -218,6 +200,13 @@ extern "C" UNMAP_AFTER_INIT void init_finished(u32 cpu)
void init_stage2(void*)
{
// This is a little bit of a hack. We can't register our process at the time we're
// creating it, but we need to be registered otherwise finalization won't be happy.
// The colonel process gets away without having to do this because it never exits.
Process::register_new(*Process::current());
WorkQueue::initialize();
if (APIC::initialized() && APIC::the().enabled_processor_count() > 1) {
// We can't start the APs until we have a scheduler up and running.
// We need to be able to process ICI messages, otherwise another
@ -226,6 +215,23 @@ void init_stage2(void*)
APIC::the().boot_aps();
}
// Initialize the PCI Bus as early as possible, for early boot (PCI based) serial logging
SysFSComponentRegistry::initialize();
PCI::initialize();
PCISerialDevice::detect();
VirtualFileSystem::initialize();
NullDevice::initialize();
if (!get_serial_debug())
(void)SerialDevice::must_create(0).leak_ref();
(void)SerialDevice::must_create(1).leak_ref();
(void)SerialDevice::must_create(2).leak_ref();
(void)SerialDevice::must_create(3).leak_ref();
VMWareBackdoor::the(); // don't wait until first mouse packet
HIDManagement::initialize();
GraphicsManagement::the().initialize();
ConsoleManagement::the().initialize();