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Re: [Qemu-devel] Re: >2 serial ports?


From: Paul Brook
Subject: Re: [Qemu-devel] Re: >2 serial ports?
Date: Wed, 17 Mar 2010 11:18:09 +0000
User-agent: KMail/1.12.4 (Linux/2.6.32-trunk-amd64; KDE/4.3.4; x86_64; ; )

> Oh, well, yes, I remember.  qemu is more strict on ISA irq sharing now.
>   A bit too strict.
> 
> /me goes dig out a old patch which never made it upstream for some
> reason I forgot.  Attached.

This is wrong. Two devices should never be manipulating the same qemu_irq 
object.  If you want multiple devices connected to the same IRQ then you need 
an explicit multiplexer. e.g. arm_timer.c:sp804_set_irq.

Paul




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