* Avi Kivity <[EMAIL PROTECTED]> wrote:
> - *pic in kernel: most effort, easiest irq synchronization. Interface
> is pic/ioapic pin level, plus a topology description that userspace
> uses to tell the hardware how the pins are connected (logically
> required, but practically not).
yeah, that variant is the right way to do it. Note that this also paves
the way for possible future PIC hardware virtualization features like
the CPU directly injecting an external IRQ vector to the guest [without
trapping out to the hypervisor]. Interrupt handling fundamentally
belongs into the kernel, be that the host or the guest. (User-space
abstractions in the PIC space make little sense and i know of none.)
Ingo
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