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Message-ID: <451574B0.7000907@bellard.org>
Date: Sat, 23 Sep 2006 19:53:52 +0200
From: Fabrice Bellard <fabrice@bellard.org>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] [PATCH] IRQ sharing in PCI bus
References: <fb249edb0609231025u193efba8o4d0aa4c2d4a4a13e@mail.gmail.com>
	<45157114.4010901@bellard.org>
	<200609231843.05404.paul@codesourcery.com>
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To: Paul Brook <paul@codesourcery.com>
Cc: qemu-devel@nongnu.org

Paul Brook wrote:
> On Saturday 23 September 2006 18:38, Fabrice Bellard wrote:
> 
>>andrzej zaborowski wrote:
>>
>>>This allows multiple PCI devices on a bus to use the same IRQ lines.
>>>The signals from all devices are ORed. It will only work if the guest
>>>OS'es drivers supports that.
>>>
>>>Linux guest required that to have scsi disks and usb devices working
>>>at the same time on an emulated Versatile PB machine.
>>
>>PCI IRQ sharing is already implemented, at least for piix3. You should
>>look at that code and try to fix the related code in other PCI controllers.
> 
> 
> Seems silly to implement this several times rather than once in generic code.

Right. My comment did not exclude that :-)

Fabrice.