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List:       bochs-dev
Subject:    [Bochs-developers] Interrupt delivery in Bochs SMP
From:       Warren Toomey <wkt () tuhs ! org>
Date:       2003-10-25 4:02:12
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I'm using Bochs to implement SMP in a microkernel OS. I've already got Minix
SMP installed and running on Bochs with 2 CPUs. With Minix, both CPUs set
their local APIC to ExINT mode, so that they should both receive external
interrupts. However, only CPU0 is receiving external interrupts.
Interprocessor interrupts do work with Bochs.

On a real platform with 2 CPUs and running Minix SMP, both CPUs are seeing
external interrupts. I've been tearing out my hair trying to work out why
Bochs isn't delivering interrupts to both CPUs. If someone could point out
where I should look in the Bochs code, or a patch that I can apply, to get
the external interrupts to be sent to both CPUs, I'd be very grateful.

Thanks,
	Warren

P.S Minix SMP doesn't touch the I/O APIC, so I don't think that this is
the problem.


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