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Revision 1452411b

ID1452411b25fb207e7f442e5a5128f34b4939d31c

Added by Avi Kivity over 11 years ago

Route PC irqs to ISA bus instead of i8259 directly

A PC has its motherboard IRQ lines connected to both the PIC and IOAPIC.
Currently, qemu routes IRQs to the PIC which then calls the IOAPIC, an
incestuous arrangement. In order to clean this up, create a new ISA IRQ
abstraction, and have devices raise ISA IRQs (which in turn raise the i8259
IRQs as usual).

Signed-off-by: Avi Kivity <>
Signed-off-by: Anthony Liguori <>

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