From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3AE3EC433FE for ; Thu, 24 Feb 2022 16:39:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229964AbiBXQkS (ORCPT ); Thu, 24 Feb 2022 11:40:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229747AbiBXQkR (ORCPT ); Thu, 24 Feb 2022 11:40:17 -0500 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EFD9714028; Thu, 24 Feb 2022 08:39:47 -0800 (PST) Received: by verein.lst.de (Postfix, from userid 2407) id 8DAAC68AFE; Thu, 24 Feb 2022 17:39:43 +0100 (CET) Date: Thu, 24 Feb 2022 17:39:43 +0100 From: Christoph Hellwig To: Boris Ostrovsky Cc: Christoph Hellwig , iommu@lists.linux-foundation.org, x86@kernel.org, Stefano Stabellini , Juergen Gross , Joerg Roedel , David Woodhouse , Lu Baolu , Robin Murphy , linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-hyperv@vger.kernel.org, tboot-devel@lists.sourceforge.net, linux-pci@vger.kernel.org Subject: Re: cleanup swiotlb initialization Message-ID: <20220224163943.GA32088@lst.de> References: <20220222153514.593231-1-hch@lst.de> <09cb4ad3-88e7-3744-b4b8-a6d745ecea9e@oracle.com> <20220224155854.GA30938@lst.de> <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> User-Agent: Mutt/1.5.17 (2007-11-01) Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org On Thu, Feb 24, 2022 at 11:18:33AM -0500, Boris Ostrovsky wrote: > > On 2/24/22 10:58 AM, Christoph Hellwig wrote: >> Thanks. >> >> This looks really strange as early_amd_iommu_init should not interact much >> with the changes. I'll see if I can find a AMD system to test on. > > > Just to be clear: this crashes only as dom0. Boots fine as baremetal. Ah. I can gues what this might be. On Xen the hypervisor controls the IOMMU and we should never end up initializing it in Linux, right? From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Thu, 24 Feb 2022 16:39:43 +0000 Subject: Re: cleanup swiotlb initialization Message-Id: <20220224163943.GA32088@lst.de> List-Id: References: <20220222153514.593231-1-hch@lst.de> <09cb4ad3-88e7-3744-b4b8-a6d745ecea9e@oracle.com> <20220224155854.GA30938@lst.de> <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> In-Reply-To: <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Boris Ostrovsky Cc: Christoph Hellwig , iommu@lists.linux-foundation.org, x86@kernel.org, Stefano Stabellini , Juergen Gross , Joerg Roedel , David Woodhouse , Lu Baolu , Robin Murphy , linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-hyperv@vger.kernel.org, tboot-devel@lists.sourceforge.net, linux-pci@vger.kernel.org On Thu, Feb 24, 2022 at 11:18:33AM -0500, Boris Ostrovsky wrote: > > On 2/24/22 10:58 AM, Christoph Hellwig wrote: >> Thanks. >> >> This looks really strange as early_amd_iommu_init should not interact much >> with the changes. I'll see if I can find a AMD system to test on. > > > Just to be clear: this crashes only as dom0. Boots fine as baremetal. Ah. I can gues what this might be. On Xen the hypervisor controls the IOMMU and we should never end up initializing it in Linux, right? From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 807A2C43217 for ; Thu, 24 Feb 2022 16:39:52 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 1C4EB40A0C; Thu, 24 Feb 2022 16:39:52 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 98fcJl_r6doX; Thu, 24 Feb 2022 16:39:51 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp2.osuosl.org (Postfix) with ESMTPS id 8F08C409F2; Thu, 24 Feb 2022 16:39:50 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 625F9C001A; Thu, 24 Feb 2022 16:39:50 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 3B0D4C0011 for ; Thu, 24 Feb 2022 16:39:49 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 1AA94409F9 for ; Thu, 24 Feb 2022 16:39:49 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id olXu3vuLrVsG for ; Thu, 24 Feb 2022 16:39:48 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by smtp2.osuosl.org (Postfix) with ESMTPS id 53DFE409F2 for ; Thu, 24 Feb 2022 16:39:48 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 8DAAC68AFE; Thu, 24 Feb 2022 17:39:43 +0100 (CET) Date: Thu, 24 Feb 2022 17:39:43 +0100 From: Christoph Hellwig To: Boris Ostrovsky Subject: Re: cleanup swiotlb initialization Message-ID: <20220224163943.GA32088@lst.de> References: <20220222153514.593231-1-hch@lst.de> <09cb4ad3-88e7-3744-b4b8-a6d745ecea9e@oracle.com> <20220224155854.GA30938@lst.de> <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Juergen Gross , linux-s390@vger.kernel.org, linux-hyperv@vger.kernel.org, Stefano Stabellini , linux-ia64@vger.kernel.org, Robin Murphy , x86@kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org, tboot-devel@lists.sourceforge.net, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, linux-riscv@lists.infradead.org, David Woodhouse , Christoph Hellwig , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Thu, Feb 24, 2022 at 11:18:33AM -0500, Boris Ostrovsky wrote: > > On 2/24/22 10:58 AM, Christoph Hellwig wrote: >> Thanks. >> >> This looks really strange as early_amd_iommu_init should not interact much >> with the changes. I'll see if I can find a AMD system to test on. > > > Just to be clear: this crashes only as dom0. Boots fine as baremetal. Ah. I can gues what this might be. On Xen the hypervisor controls the IOMMU and we should never end up initializing it in Linux, right? _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AA37FC43217 for ; Thu, 24 Feb 2022 16:40:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=RTccGubN53NiuHW0P+iP/RjAWXI19Vl7akaSssURhGE=; b=wi06PwIJNXs4Og GRUzY1Cf2SvXvwZRTDJ4mhWqQ9k/B+ub4RyJx9pf0yNW8PiV9/sqGTruJJ5HBNkitTR2YBmjm4nwu Tm6BRbbNwVux1sVmnZ9NKyr1hHjgHNzjMzvOqG52LxTC3bKP188GEKB9BMERxOGfUYno5khp7QRtP YLn7icgpoQkQDsd/I1HuuON0SPf8nTLqojNP+5ePrqTkd8AMBUng3lrqXF9Ue13q2VkBF/KlT4wO/ 6jggLxeI7v7a17Sr6Hjcs93MN7kHhkJ1SwtJiaag3i7hrqLq7ocDTg4MK0eBWDHEsvMYa/MbE71U8 O2nljrDRr35hbPTYtLsQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nNH9t-001bAm-5E; Thu, 24 Feb 2022 16:40:01 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nNH9g-001b7Y-0Y; Thu, 24 Feb 2022 16:39:49 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 8DAAC68AFE; Thu, 24 Feb 2022 17:39:43 +0100 (CET) Date: Thu, 24 Feb 2022 17:39:43 +0100 From: Christoph Hellwig To: Boris Ostrovsky Cc: Christoph Hellwig , iommu@lists.linux-foundation.org, x86@kernel.org, Stefano Stabellini , Juergen Gross , Joerg Roedel , David Woodhouse , Lu Baolu , Robin Murphy , linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-hyperv@vger.kernel.org, tboot-devel@lists.sourceforge.net, linux-pci@vger.kernel.org Subject: Re: cleanup swiotlb initialization Message-ID: <20220224163943.GA32088@lst.de> References: <20220222153514.593231-1-hch@lst.de> <09cb4ad3-88e7-3744-b4b8-a6d745ecea9e@oracle.com> <20220224155854.GA30938@lst.de> <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220224_083948_208930_4D8F5E08 X-CRM114-Status: GOOD ( 13.07 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Thu, Feb 24, 2022 at 11:18:33AM -0500, Boris Ostrovsky wrote: > > On 2/24/22 10:58 AM, Christoph Hellwig wrote: >> Thanks. >> >> This looks really strange as early_amd_iommu_init should not interact much >> with the changes. I'll see if I can find a AMD system to test on. > > > Just to be clear: this crashes only as dom0. Boots fine as baremetal. Ah. I can gues what this might be. On Xen the hypervisor controls the IOMMU and we should never end up initializing it in Linux, right? _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 88DA9C433EF for ; Thu, 24 Feb 2022 16:40:13 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4K4JY71b8cz3cQ4 for ; Fri, 25 Feb 2022 03:40:11 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lst.de (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4K4JXh3tQQz2yLP for ; Fri, 25 Feb 2022 03:39:48 +1100 (AEDT) Received: by verein.lst.de (Postfix, from userid 2407) id 8DAAC68AFE; Thu, 24 Feb 2022 17:39:43 +0100 (CET) Date: Thu, 24 Feb 2022 17:39:43 +0100 From: Christoph Hellwig To: Boris Ostrovsky Subject: Re: cleanup swiotlb initialization Message-ID: <20220224163943.GA32088@lst.de> References: <20220222153514.593231-1-hch@lst.de> <09cb4ad3-88e7-3744-b4b8-a6d745ecea9e@oracle.com> <20220224155854.GA30938@lst.de> <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juergen Gross , linux-s390@vger.kernel.org, linux-hyperv@vger.kernel.org, Stefano Stabellini , linux-ia64@vger.kernel.org, Robin Murphy , Joerg Roedel , x86@kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org, tboot-devel@lists.sourceforge.net, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, linux-riscv@lists.infradead.org, David Woodhouse , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Lu Baolu Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, Feb 24, 2022 at 11:18:33AM -0500, Boris Ostrovsky wrote: > > On 2/24/22 10:58 AM, Christoph Hellwig wrote: >> Thanks. >> >> This looks really strange as early_amd_iommu_init should not interact much >> with the changes. I'll see if I can find a AMD system to test on. > > > Just to be clear: this crashes only as dom0. Boots fine as baremetal. Ah. I can gues what this might be. On Xen the hypervisor controls the IOMMU and we should never end up initializing it in Linux, right? From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 60F95C433F5 for ; Thu, 24 Feb 2022 16:41:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=XS/L6ZfRIyPl9eYlID2TPdQ31tqhUUIJgUhwHAb9xXE=; b=hVviatbl/RIYOQ 05o5UOHGm8fb7JbcRd+cZVFnPhxsmGlPuvPMSMo3EypIqnf/hHoYYMJAuLUJZvyL4+WFGhWcI0IPI uxuc7wJumWfroPlOc1z5L4YHL2FcJgD20EuWqaCQqnqLMzntbLEDaAUiIOSL5q22y85TsaQ6VKgbd t+Mu4VWnfRNfbgkOw6pLh0phLriOF/fRoDuuDoyzqdM06cf0iF+Nvkev00DBLZ/zT6C3d6z8HMsU+ DVFCPUma+Q3dDKItmTNsS+ee02LibLAvLu1O0buoWekW6epcw8xeO+ZUKrokjlMPvs+9W1KjZX8dV MpT8KNmc7EqTSVT4ZLZA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nNH9j-001b8L-SL; Thu, 24 Feb 2022 16:39:51 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nNH9g-001b7Y-0Y; Thu, 24 Feb 2022 16:39:49 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 8DAAC68AFE; Thu, 24 Feb 2022 17:39:43 +0100 (CET) Date: Thu, 24 Feb 2022 17:39:43 +0100 From: Christoph Hellwig To: Boris Ostrovsky Cc: Christoph Hellwig , iommu@lists.linux-foundation.org, x86@kernel.org, Stefano Stabellini , Juergen Gross , Joerg Roedel , David Woodhouse , Lu Baolu , Robin Murphy , linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-hyperv@vger.kernel.org, tboot-devel@lists.sourceforge.net, linux-pci@vger.kernel.org Subject: Re: cleanup swiotlb initialization Message-ID: <20220224163943.GA32088@lst.de> References: <20220222153514.593231-1-hch@lst.de> <09cb4ad3-88e7-3744-b4b8-a6d745ecea9e@oracle.com> <20220224155854.GA30938@lst.de> <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <206ba6a3-770a-70ad-96bc-76c6380da988@oracle.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220224_083948_208930_4D8F5E08 X-CRM114-Status: GOOD ( 13.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Feb 24, 2022 at 11:18:33AM -0500, Boris Ostrovsky wrote: > > On 2/24/22 10:58 AM, Christoph Hellwig wrote: >> Thanks. >> >> This looks really strange as early_amd_iommu_init should not interact much >> with the changes. I'll see if I can find a AMD system to test on. > > > Just to be clear: this crashes only as dom0. Boots fine as baremetal. Ah. I can gues what this might be. On Xen the hypervisor controls the IOMMU and we should never end up initializing it in Linux, right? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel