From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MgL0r-0005iv-Th for qemu-devel@nongnu.org; Wed, 26 Aug 2009 12:06:17 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MgL0j-0005Rp-Vj for qemu-devel@nongnu.org; Wed, 26 Aug 2009 12:06:17 -0400 Received: from [199.232.76.173] (port=54354 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MgL0j-0005RW-PO for qemu-devel@nongnu.org; Wed, 26 Aug 2009 12:06:09 -0400 Received: from mx1.redhat.com ([209.132.183.28]:37635) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1MgL0i-0002Dg-CJ for qemu-devel@nongnu.org; Wed, 26 Aug 2009 12:06:09 -0400 Message-ID: <4A955D6A.9060804@redhat.com> Date: Wed, 26 Aug 2009 19:06:02 +0300 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [Qemu-devel] [PATCH 2/2] Route IOAPIC interrupts via ISA bus References: <1249836296-13288-1-git-send-email-avi@redhat.com> <1249836296-13288-3-git-send-email-avi@redhat.com> <4A955CB4.4080205@redhat.com> In-Reply-To: <4A955CB4.4080205@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: qemu-devel@nongnu.org On 08/26/2009 07:03 PM, Gerd Hoffmann wrote: > On 08/09/09 18:44, Avi Kivity wrote: >> Instead of calling the IOAPIC from the PIC, raise IOAPIC irqs via the >> ISA bus. >> As a side effect, IOAPIC lines 16-23 are enabled. > > Now we probably need some acpi magic to tell the guest OS that there > are a few more IRQ lines? > I wanted to route the PCI IRQs to those lines (and have eight links instead of four). Now I don't think it's worthwhile, as every guest that is interesting from a performance point of view has MSI support. So I think we should just leave these lines as is, terminated with a 4.7K resistor to avoid picking up noise. -- error compiling committee.c: too many arguments to function