From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1GRBX3-0001Cv-NQ for qemu-devel@nongnu.org; Sat, 23 Sep 2006 13:43:17 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1GRBX2-0001B6-02 for qemu-devel@nongnu.org; Sat, 23 Sep 2006 13:43:17 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1GRBX1-0001At-K5 for qemu-devel@nongnu.org; Sat, 23 Sep 2006 13:43:15 -0400 Received: from [65.74.133.4] (helo=mail.codesourcery.com) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA:32) (Exim 4.52) id 1GRBb1-0001Y9-Tf for qemu-devel@nongnu.org; Sat, 23 Sep 2006 13:47:24 -0400 From: Paul Brook Subject: Re: [Qemu-devel] [PATCH] IRQ sharing in PCI bus Date: Sat, 23 Sep 2006 18:43:04 +0100 References: <45157114.4010901@bellard.org> In-Reply-To: <45157114.4010901@bellard.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200609231843.05404.paul@codesourcery.com> Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org 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. Paul