To deal with guest shared interrupt bug in in-kernel irqchip, we should: 1. Identify each level trig interrupt source. 2. Implement logical OR on the same IRQ line for each interrupt source.
Here I chose a simple method: the caller of kvm_set_irq() has responsiblity to identify interrupt sources, and IOAPIC/PIC ensure logical OR on IRQ line. The alternative method of identify can be: a process to request/allocate/free device identity, then kvm_set_irq() has responsibility to identify interrupt sources. But I think it's too complicate and unnecessary, for the caller of set_irq() should aware of the IRQ state. The patch treats all userspace devices as one source. This have been ensured by QEmu, which would ensure logical OR on IRQ line if IRQ line is sharing in userspace. Comments are welcome! And patches are untested, due to our boxes are down during the holiday(and my Linux Desktop in the company also down, have to post patch with outlook)... Thanks! -- regards Yang, Sheng -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
