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Kernel/Interrupts: Return boolean on whether we handled the interrupt

Browse source 
If we are in a shared interrupt handler, the called handlers might
indicate it was not their interrupt, so we should not increment the
call counter of these handlers.
This commit is contained in:
Liav A 2021-06-05 09:00:18 +03:00 • committed by Andreas Kling
parent 7a6d5a7b8b
commit b91df26d4a
43 changed files with 125 additions and 71 deletions
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13
Kernel/VirtIO/VirtIO.cpp
View file

@ -342,11 +342,13 @@ u8 VirtIODevice::isr_status()
return config_read8(*m_isr_cfg, 0);
}
void VirtIODevice::handle_irq(const RegisterState&)
bool VirtIODevice::handle_irq(const RegisterState&)
{
u8 isr_type = isr_status();
if ((isr_type & (QUEUE_INTERRUPT | DEVICE_CONFIG_INTERRUPT)) == 0)
if ((isr_type & (QUEUE_INTERRUPT | DEVICE_CONFIG_INTERRUPT)) == 0) {
dbgln_if(VIRTIO_DEBUG, "{}: Handling interrupt with unknown type: {}", m_class_name, isr_type);
return false;
}
if (isr_type & DEVICE_CONFIG_INTERRUPT) {
dbgln_if(VIRTIO_DEBUG, "{}: VirtIO Device config interrupt!", m_class_name);
if (!handle_device_config_change()) {
@ -357,11 +359,14 @@ void VirtIODevice::handle_irq(const RegisterState&)
if (isr_type & QUEUE_INTERRUPT) {
dbgln_if(VIRTIO_DEBUG, "{}: VirtIO Queue interrupt!", m_class_name);
for (size_t i = 0; i < m_queues.size(); i++) {
if (get_queue(i).new_data_available())
return handle_queue_update(i);
if (get_queue(i).new_data_available()) {
handle_queue_update(i);
return true;
}
}
dbgln_if(VIRTIO_DEBUG, "{}: Got queue interrupt but all queues are up to date!", m_class_name);
}
return true;
}
void VirtIODevice::supply_chain_and_notify(u16 queue_index, VirtIOQueueChain& chain)

2
Kernel/VirtIO/VirtIO.h
View file

@ -222,7 +222,7 @@ private:
void reset_device();
u8 isr_status();
virtual void handle_irq(const RegisterState&) override;
virtual bool handle_irq(const RegisterState&) override;
NonnullOwnPtrVector<VirtIOQueue> m_queues;
NonnullOwnPtrVector<Configuration> m_configs;