From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Kwon Subject: Re: KVM PCI passthrough IRQ limitations Date: Tue, 03 Mar 2009 17:15:57 -0800 Message-ID: <49ADD64D.4000200@redback.com> References: <49ADAC06.5040407@redback.com> <20090303223645.GC24280@sequoia.sous-sol.org> <49ADBC92.7020100@redback.com> <20090303233336.GD24280@sequoia.sous-sol.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from mgate.redback.com ([155.53.3.41]:53683 "EHLO mgate.redback.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751747AbZCDBZq (ORCPT ); Tue, 3 Mar 2009 20:25:46 -0500 Received: from localhost (localhost [127.0.0.1]) by prattle.redback.com (Postfix) with ESMTP id 332DBD8C163 for ; Tue, 3 Mar 2009 17:15:58 -0800 (PST) Received: from prattle.redback.com ([127.0.0.1]) by localhost (prattle [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 29976-02 for ; Tue, 3 Mar 2009 17:15:58 -0800 (PST) Received: from [155.53.129.111] (unknown [155.53.129.111]) by prattle.redback.com (Postfix) with ESMTP id 1CCAED8C162 for ; Tue, 3 Mar 2009 17:15:58 -0800 (PST) In-Reply-To: <20090303233336.GD24280@sequoia.sous-sol.org> Sender: kvm-owner@vger.kernel.org List-ID: Chris Wright wrote: > * Jason Kwon (jkwon@redback.com) wrote: >> pci 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 >> IRQ handler type mismatch for IRQ 16 >> current handler: uhci_hcd:usb3 > > This is a shared interrupt (and pci device assignment will request a > non-shared interrupt). Are you using that usb host controller? Can you > unbind it? I attempted unbinding the usb host driver, but the IRQ was/is also shared by the SATA drive controller, so I'm stuck. I tried moving the card to a different slot but the IRQ assignments were the same. Does it make any difference whether the device is MSI-capable or not? Thanks, Jason