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Re: [Qemu-devel] [PATCH] IRQ sharing in PCI bus

From: Fabrice Bellard
Subject: Re: [Qemu-devel] [PATCH] IRQ sharing in PCI bus
Date: Sat, 23 Sep 2006 19:53:52 +0200
User-agent: Mozilla Thunderbird 1.0.2-6 (X11/20050513)

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 :-)


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