From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46965) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bKV7A-0001nm-Qx for qemu-devel@nongnu.org; Tue, 05 Jul 2016 14:30:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bKV75-0003FP-QF for qemu-devel@nongnu.org; Tue, 05 Jul 2016 14:30:31 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44221) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bKV75-0003F3-KL for qemu-devel@nongnu.org; Tue, 05 Jul 2016 14:30:27 -0400 References: <577A611E.3010204@kamp.de> From: Laszlo Ersek Message-ID: Date: Tue, 5 Jul 2016 20:30:24 +0200 MIME-Version: 1.0 In-Reply-To: <577A611E.3010204@kamp.de> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Qemu and PCI Interrupt Link? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Lieven , "qemu-devel@nongnu.org" , Paolo Bonzini On 07/04/16 15:14, Peter Lieven wrote: > Hi, > > i noticed that newer guest kernels emit the following message at startup: > > ACPI: No IRQ available for PCI Interrupt Link [LNKS]. Try pci=noacpi or > acpi=off > > Cmdline: > x86_64-softmmu/qemu-system-x86_64 -enable-kvm -m 2048 -cdrom > ~/Downloads/ubuntu-16.04-desktop-amd64.iso > > Is this expected? This seems to come from kernel commit 5ebc76035303. Thankfully the commit message is quite detailed. The commit message makes me think that the kernel patch is incorrect. It certainly seems to conflict with the following SeaBIOS commit: commit f64a472a481784231fbf8541825501df411b11d1 Author: Paolo Bonzini Date: Thu Dec 13 08:42:02 2012 +0100 acpi: reintroduce LNKS That SeaBIOS patch is where we have the identical functionality in QEMU from (see QEMU commits 74523b850189a and c35b6e8032105). Thanks Laszlo