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Merge pull request #2842 from Subv/switchable_page_table

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Kernel/Memory: Give each process its own page table and allow switching the current page table upon reschedule
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B3n30 2017-09-15 22:41:45 +02:00 • committed by GitHub
commit 813837c5cf
14 changed files with 191 additions and 123 deletions
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12
src/core/hle/kernel/thread.cpp
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@ -171,6 +171,8 @@ static void SwitchContext(Thread* new_thread) {
// Cancel any outstanding wakeup events for this thread
CoreTiming::UnscheduleEvent(ThreadWakeupEventType, new_thread->callback_handle);
auto previous_process = Kernel::g_current_process;
current_thread = new_thread;
ready_queue.remove(new_thread->current_priority, new_thread);
@ -178,8 +180,18 @@ static void SwitchContext(Thread* new_thread) {
Core::CPU().LoadContext(new_thread->context);
Core::CPU().SetCP15Register(CP15_THREAD_URO, new_thread->GetTLSAddress());
if (previous_process != current_thread->owner_process) {
Kernel::g_current_process = current_thread->owner_process;
Memory::current_page_table = &Kernel::g_current_process->vm_manager.page_table;
// We have switched processes and thus, page tables, clear the instruction cache so we
// don't keep stale data from the previous process.
Core::CPU().ClearInstructionCache();
}
} else {
current_thread = nullptr;
// Note: We do not reset the current process and current page table when idling because
// technically we haven't changed processes, our threads are just paused.
}
}