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Kernel: Disable unused interrupt methods in PCI devices

This commit is contained in:
Bananymous 2025-05-30 22:04:37 +03:00
parent 30074c290d
commit 857bac4b78
1 changed files with 25 additions and 0 deletions
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25
kernel/kernel/PCI.cpp
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@ -415,12 +415,35 @@ namespace Kernel::PCI
const uint8_t irq = get_interrupt(index);
interruptable.set_irq(irq);
const auto disable_msi =
[this]()
{
if (!m_offset_msi.has_value())
return;
uint16_t msg_ctrl = read_word(*m_offset_msi + 0x02);
msg_ctrl &= ~(1u << 0);
write_word(*m_offset_msi + 0x02, msg_ctrl);
};
const auto disable_msi_x =
[this]()
{
if (!m_offset_msi_x.has_value())
return;
uint16_t msg_ctrl = read_word(*m_offset_msi_x + 0x02);
msg_ctrl &= ~(1u << 15); // Disable
write_word(*m_offset_msi_x + 0x02, msg_ctrl);
};
switch (m_interrupt_mechanism)
{
case InterruptMechanism::NONE:
ASSERT_NOT_REACHED();
case InterruptMechanism::PIN:
enable_pin_interrupts();
disable_msi();
disable_msi_x();
if (!InterruptController::get().is_using_apic())
write_byte(PCI_REG_IRQ_LINE, irq);
InterruptController::get().enable_irq(irq);
@ -428,6 +451,7 @@ namespace Kernel::PCI
case InterruptMechanism::MSI:
{
disable_pin_interrupts();
disable_msi_x();
uint16_t msg_ctrl = read_word(*m_offset_msi + 0x02);
msg_ctrl &= ~(0x07 << 4); // Only one interrupt
@ -454,6 +478,7 @@ namespace Kernel::PCI
case InterruptMechanism::MSIX:
{
disable_pin_interrupts();
disable_msi();
uint16_t msg_ctrl = read_word(*m_offset_msi_x + 0x02);
msg_ctrl |= 1 << 15; // Enable