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 8E8E0C433F5 for ; Thu, 24 Feb 2022 15:59:33 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4K4HfC13Tmz30Q9 for ; Fri, 25 Feb 2022 02:59:31 +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 4K4Hdg0S3tz2xtp for ; Fri, 25 Feb 2022 02:59:01 +1100 (AEDT) Received: by verein.lst.de (Postfix, from userid 2407) id 88B5268AFE; Thu, 24 Feb 2022 16:58:54 +0100 (CET) Date: Thu, 24 Feb 2022 16:58:54 +0100 From: Christoph Hellwig To: Boris Ostrovsky Subject: Re: cleanup swiotlb initialization Message-ID: <20220224155854.GA30938@lst.de> References: <20220222153514.593231-1-hch@lst.de> <09cb4ad3-88e7-3744-b4b8-a6d745ecea9e@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <09cb4ad3-88e7-3744-b4b8-a6d745ecea9e@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" 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. On Wed, Feb 23, 2022 at 07:57:49PM -0500, Boris Ostrovsky wrote: > [   37.377313] BUG: unable to handle page fault for address: ffffc90042880018 > [   37.378219] #PF: supervisor read access in kernel mode > [   37.378219] #PF: error_code(0x0000) - not-present page > [   37.378219] PGD 7c2f2ee067 P4D 7c2f2ee067 PUD 7bf019b067 PMD 105a30067 PTE 0 > [   37.378219] Oops: 0000 [#1] PREEMPT SMP NOPTI > [   37.378219] CPU: 14 PID: 1 Comm: swapper/0 Not tainted 5.17.0-rc5swiotlb #9 > [   37.378219] Hardware name: Oracle Corporation ORACLE SERVER E1-2c/ASY,Generic,SM,E1-2c, BIOS 49004900 12/23/2020 > [   37.378219] RIP: e030:init_iommu_one+0x248/0x2f0 > [   37.378219] Code: 48 89 43 68 48 85 c0 74 c4 be 00 20 00 00 48 89 df e8 ea ee ff ff 48 89 43 78 48 85 c0 74 ae c6 83 98 00 00 00 00 48 8b 43 38 <48> 8b 40 18 a8 01 74 07 83 8b a8 04 00 00 01 f6 83 a8 04 00 00 01 > [   37.378219] RSP: e02b:ffffc9004044bd18 EFLAGS: 00010286 > [   37.378219] RAX: ffffc90042880000 RBX: ffff888107260800 RCX: 0000000000000000 > [   37.378219] RDX: 0000000080000000 RSI: ffffea00041cab80 RDI: 00000000ffffffff > [   37.378219] RBP: ffffc9004044bd38 R08: 0000000000000901 R09: ffffea00041cab00 > [   37.378219] R10: 0000000000000002 R11: 0000000000000000 R12: ffffc90040435008 > [   37.378219] R13: 0000000000080000 R14: 00000000efa00000 R15: 0000000000000000 > [   37.378219] FS:  0000000000000000(0000) GS:ffff88fef4180000(0000) knlGS:0000000000000000 > [   37.378219] CS:  e030 DS: 0000 ES: 0000 CR0: 0000000080050033 > [   37.378219] CR2: ffffc90042880018 CR3: 000000000260a000 CR4: 0000000000050660 > [   37.378219] Call Trace: > [   37.378219]  > [   37.378219]  early_amd_iommu_init+0x3c5/0x72d > [   37.378219]  ? iommu_setup+0x284/0x284 > [   37.378219]  state_next+0x158/0x68f > [   37.378219]  ? iommu_setup+0x284/0x284 > [   37.378219]  iommu_go_to_state+0x28/0x2d > [   37.378219]  amd_iommu_init+0x15/0x4b > [   37.378219]  ? iommu_setup+0x284/0x284 > [   37.378219]  pci_iommu_init+0x12/0x37 > [   37.378219]  do_one_initcall+0x48/0x210 > [   37.378219]  kernel_init_freeable+0x229/0x28c > [   37.378219]  ? rest_init+0xe0/0xe0 > [   37.963966]  kernel_init+0x1a/0x130 > [   37.979415]  ret_from_fork+0x22/0x30 > [   37.991436]  > [   37.999465] Modules linked in: > [   38.007413] CR2: ffffc90042880018 > [   38.019416] ---[ end trace 0000000000000000 ]--- > [   38.023418] RIP: e030:init_iommu_one+0x248/0x2f0 > [   38.023418] Code: 48 89 43 68 48 85 c0 74 c4 be 00 20 00 00 48 89 df e8 ea ee ff ff 48 89 43 78 48 85 c0 74 ae c6 83 98 00 00 00 00 48 8b 43 38 <48> 8b 40 18 a8 01 74 07 83 8b a8 04 00 00 01 f6 83 a8 04 00 00 01 > [   38.023418] RSP: e02b:ffffc9004044bd18 EFLAGS: 00010286 > [   38.023418] RAX: ffffc90042880000 RBX: ffff888107260800 RCX: 0000000000000000 > [   38.155413] RDX: 0000000080000000 RSI: ffffea00041cab80 RDI: 00000000ffffffff > [   38.175965] Freeing initrd memory: 62640K > [   38.155413] RBP: ffffc9004044bd38 R08: 0000000000000901 R09: ffffea00041cab00 > [   38.155413] R10: 0000000000000002 R11: 0000000000000000 R12: ffffc90040435008 > [   38.155413] R13: 0000000000080000 R14: 00000000efa00000 R15: 0000000000000000 > [   38.155413] FS:  0000000000000000(0000) GS:ffff88fef4180000(0000) knlGS:0000000000000000 > [   38.287414] CS:  e030 DS: 0000 ES: 0000 CR0: 0000000080050033 > [   38.309557] CR2: ffffc90042880018 CR3: 000000000260a000 CR4: 0000000000050660 > [   38.332403] Kernel panic - not syncing: Fatal exception > [   38.351414] Rebooting in 20 seconds.. > > > > -boris ---end quoted text---