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 X-Spam-Level: X-Spam-Status: No, score=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3B4D5C433DF for ; Thu, 20 Aug 2020 05:51:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B30B207DE for ; Thu, 20 Aug 2020 05:51:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=canb.auug.org.au header.i=@canb.auug.org.au header.b="fbr2cB4K" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727827AbgHTFvT (ORCPT ); Thu, 20 Aug 2020 01:51:19 -0400 Received: from bilbo.ozlabs.org ([203.11.71.1]:58129 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726734AbgHTFvS (ORCPT ); Thu, 20 Aug 2020 01:51:18 -0400 Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4BXDKZ6l9bz9sRN; Thu, 20 Aug 2020 15:51:14 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=canb.auug.org.au; s=201702; t=1597902675; bh=PDDXXLzDsesoBGtDsKFJIP1oinLz/y0QOw45ZXbN8lM=; h=Date:From:To:Cc:Subject:From; b=fbr2cB4K7pctLNKlRj52MZVPu9ScCmj27Bo0lRp9JmabAvFcz1lnBYZnWVjKyE7OZ s65A6RnyaDVjR+SjDKQqwDMBvB2X7u+XJ3gyL6H0Sqfi7Yq7xbSPJM1vRvW2JA7MOv y4PrRa00EyC6O/9dDUZSrbtiRRUWo7rwNvlo+oDjvBdp+/MrFvNcHzmHtXbgOcCgBj T5Otv6TsWq/ktGzN+JQOfjTc+ipP5Q6WdRtjwIg/6maN1aCksL1X2aDiuXpHdDih/P O3FesizZcabycJOSzhFg0z0LGDX71ORRuwfablztagngXEPHdtJRhSP/E26lpS8J+p thAWi3XPXq1Cw== Date: Thu, 20 Aug 2020 15:51:12 +1000 From: Stephen Rothwell To: Christoph Hellwig Cc: Linux Next Mailing List , Linux Kernel Mailing List , Nicolin Chen Subject: linux-next: boot failure after merge of the dma-mapping tree Message-ID: <20200820155112.29459f41@canb.auug.org.au> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/FueENkLviib2t9bhQAff9HD"; protocol="application/pgp-signature"; micalg=pgp-sha256 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/FueENkLviib2t9bhQAff9HD Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi all, After merging the dma-mapping tree, today's linux-next build (powerpc pseries_le_defconfig) failed like this: [ 1.829053][ T1] ------------[ cut here ]------------ [ 1.829629][ T1] kernel BUG at include/linux/iommu-helper.h:21! [ 1.830182][ T1] Oops: Exception in kernel mode, sig: 5 [#1] [ 1.830302][ T1] LE PAGE_SIZE=3D64K MMU=3DHash SMP NR_CPUS=3D2048 NUM= A pSeries [ 1.830436][ T1] Modules linked in: [ 1.830879][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.9.0-rc1 = #2 [ 1.831042][ T1] NIP: c0000000006f4944 LR: c0000000006f4924 CTR: c00= 000000004aa10 [ 1.831174][ T1] REGS: c00000007e3a31e0 TRAP: 0700 Not tainted (5.= 9.0-rc1) [ 1.831243][ T1] MSR: 8000000002029033 C= R: 44022422 XER: 20000000 [ 1.831574][ T1] CFAR: c0000000006b3084 IRQMASK: 1=20 [ 1.831574][ T1] GPR00: c0000000006f4924 c00000007e3a3470 c0000000012= 89000 0000000000000001=20 [ 1.831574][ T1] GPR04: 0000000000000000 0000000000000003 00000000000= 00040 0000000000000000=20 [ 1.831574][ T1] GPR08: 0000000000000001 0000000000000000 fffffffffff= ffffe c00c000000000000=20 [ 1.831574][ T1] GPR12: 0000000024028420 c0000000014b0000 c00000007e9= cd000 0000000000000001=20 [ 1.831574][ T1] GPR16: 0000000000000000 0000000000000000 c00000007e9= cd100 c00000007e9cd118=20 [ 1.831574][ T1] GPR20: 00000000ffffffff 0000000000000000 00000000000= 00001 0000000000000000=20 [ 1.831574][ T1] GPR24: 0000000000000000 ffffffffffffffff c00000007eb= 20000 0000000000000000=20 [ 1.831574][ T1] GPR28: 0000000000000001 000000000000bfff 00000000000= 00000 0000000000000001=20 [ 1.833145][ T1] NIP [c0000000006f4944] iommu_area_alloc+0xa4/0x170 [ 1.833271][ T1] LR [c0000000006f4924] iommu_area_alloc+0x84/0x170 [ 1.833494][ T1] Call Trace: [ 1.833686][ T1] [c00000007e3a3470] [c0000000006f4924] iommu_area_all= oc+0x84/0x170 (unreliable) [ 1.833961][ T1] [c00000007e3a34e0] [c00000000004b034] iommu_range_al= loc+0x1a4/0x410 [ 1.834116][ T1] [c00000007e3a35a0] [c00000000004b650] iommu_alloc+0x= 60/0x130 [ 1.834248][ T1] [c00000007e3a35f0] [c00000000004c6c8] iommu_map_page= +0xd8/0x210 [ 1.834381][ T1] [c00000007e3a3680] [c00000000004aa70] dma_iommu_map_= page+0x60/0x80 [ 1.834502][ T1] [c00000007e3a36a0] [c0000000001cce30] dma_map_page_a= ttrs+0x190/0x260 [ 1.834628][ T1] [c00000007e3a3750] [c00000000086195c] ibmvscsi_probe= +0x12c/0xa2c [ 1.834768][ T1] [c00000007e3a3830] [c0000000000e049c] vio_bus_probe+= 0x9c/0x460 [ 1.834880][ T1] [c00000007e3a38d0] [c0000000007f2cbc] really_probe+0= x12c/0x4e0 [ 1.834993][ T1] [c00000007e3a3970] [c0000000007f3308] driver_probe_d= evice+0x88/0x120 [ 1.835108][ T1] [c00000007e3a39a0] [c0000000007f36ec] device_driver_= attach+0xcc/0xe0 [ 1.835220][ T1] [c00000007e3a39e0] [c0000000007f3780] __driver_attac= h+0x80/0x140 [ 1.835321][ T1] [c00000007e3a3a20] [c0000000007ef9a8] bus_for_each_d= ev+0xa8/0x130 [ 1.835429][ T1] [c00000007e3a3a80] [c0000000007f2394] driver_attach+= 0x34/0x50 [ 1.835534][ T1] [c00000007e3a3aa0] [c0000000007f1878] bus_add_driver= +0x1e8/0x2b0 [ 1.835647][ T1] [c00000007e3a3b30] [c0000000007f47f8] driver_registe= r+0x98/0x1a0 [ 1.835782][ T1] [c00000007e3a3ba0] [c0000000000df4bc] __vio_register= _driver+0x4c/0x60 [ 1.835938][ T1] [c00000007e3a3bc0] [c000000000f8d924] ibmvscsi_modul= e_init+0xa4/0xdc [ 1.836056][ T1] [c00000007e3a3c00] [c000000000012430] do_one_initcal= l+0x60/0x2b0 [ 1.836175][ T1] [c00000007e3a3cd0] [c000000000f44740] kernel_init_fr= eeable+0x2e0/0x378 [ 1.836287][ T1] [c00000007e3a3db0] [c000000000012a24] kernel_init+0x= 2c/0x158 [ 1.836509][ T1] [c00000007e3a3e20] [c00000000000d9d0] ret_from_kerne= l_thread+0x5c/0x6c [ 1.836717][ T1] Instruction dump: [ 1.836904][ T1] 2da90000 f8010010 f821ff91 4bfbe669 60000000 7c3d184= 0 7c7f1b78 40810074=20 [ 1.837082][ T1] 60000000 60000000 60000000 40920010 <0fe00000> 60000= 000 60000000 408efff4=20 [ 1.838497][ T1] ---[ end trace e9dbc52052087399 ]--- The BUG is BUG_ON(!is_power_of_2(boundary_size)); in iommu_is_span_boundary() Bisected to commit 04d324bf549d ("dma-mapping: set default segment_boundary_mask to ULONG_MA= X") I have reverted that commit for today. --=20 Cheers, Stephen Rothwell --Sig_/FueENkLviib2t9bhQAff9HD Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAl8+D1AACgkQAVBC80lX 0GxJDQf+M2lLNo9bKXhxvPwlmrS29qqiZY0v5z38LkmoIqrn5XnjjQQDm39Ct/Ry DC1BnExF14hIBy/XZ8n6VXcjXXwpWnEH/AOyVo/SuB5A1kV6lzSnUmEb9WyA4+Ew SFcFbvJEsGl9Rd0p4Q9rQsBNnlzniPNoIo7LXCzQ1AvJnF3W+YuOl7sGcWhQK0bP v9Z29Zg9MuSiO4mfAk432VEVg+xEYSVLLjtPci6Bw7j8vDqcF2ZNyJ/G21wSjn7Y mql5NZn+lVQyFAosdClFVehFVRwk5x5aatqKqlsIgxfgiaSSMC4YnyVahC3r2wqg 48rWJnsXXkEmJY3jZFGY8eUFxKa2bg== =Ww36 -----END PGP SIGNATURE----- --Sig_/FueENkLviib2t9bhQAff9HD--