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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 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 AE04EC55181 for ; Tue, 21 Apr 2020 11:17:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 96CAD20780 for ; Tue, 21 Apr 2020 11:17:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728694AbgDULRK (ORCPT ); Tue, 21 Apr 2020 07:17:10 -0400 Received: from lhrrgout.huawei.com ([185.176.76.210]:2072 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728663AbgDULRG (ORCPT ); Tue, 21 Apr 2020 07:17:06 -0400 Received: from lhreml710-chm.china.huawei.com (unknown [172.18.7.107]) by Forcepoint Email with ESMTP id A887EBF23DF29DC07A5F; Tue, 21 Apr 2020 12:17:04 +0100 (IST) Received: from localhost (10.47.92.218) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1913.5; Tue, 21 Apr 2020 12:17:04 +0100 Date: Tue, 21 Apr 2020 12:16:51 +0100 From: Jonathan Cameron To: Will Deacon CC: Tian Tao , , , , , , , , , Subject: Re: [PATCH] arm32: fix flushcache syscall with device address Message-ID: <20200421121651.000009f0@Huawei.com> In-Reply-To: <20200421081239.GA15439@willie-the-truck> References: <1587456514-61156-1-git-send-email-tiantao6@hisilicon.com> <20200421081239.GA15439@willie-the-truck> Organization: Huawei Technologies Research and Development (UK) Ltd. X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; i686-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.47.92.218] X-ClientProxiedBy: lhreml729-chm.china.huawei.com (10.201.108.80) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 21 Apr 2020 09:12:39 +0100 Will Deacon wrote: > On Tue, Apr 21, 2020 at 04:08:34PM +0800, Tian Tao wrote: > > An issue has been observed on our Kungpeng916 systems when using a PCI > > express GPU. This occurs when a 32 bit application running on a 64 bit > > kernel issues a cache flush operation to a memory address that is in > > a PCI BAR of the GPU.The results in an illegal operation and > > subsequent crash. > > A kernel crash? If so, please can you include the log here? Deploying my finest copy typing from the image Tian Tao sent out KERNEL: /root/vmlinux-4.19.36-3patch-00228-debuginfo DUMPFILE: vmcore [PARTIAL DUMP] CPUS: 64 DATE: Fri Mar 20 06:59:56 2020 UPTIME: 07:01:01 LOAD AVERAGE: 33.76, 35.45, 35.79 TASKS: 59447 NODENAME: cpus-new-ondemand-0509 RELEASE: 4.19.36-3patch-0228 VERSION: #4 SMP Fri Feb 28 15:18:51 UTC 2020 MACHINE: aarch64 (unknown MHz) MEMORY: 255.7 GB PANIC: "kernel panic - not syncing: Asynchronous SError Interrupt" PID: 175108 COMMAND: "UnityMain" TASK: ffff80a96999dd00 [THREAD_INFO: ffff80a96999dd00] CPU: 62 STATE: TASK_RUNNING (PANIC) crash> bt PID: 175108 TASK: ffff80a96999dd00 CPU: 62 COMMAND: "UnityMain" #0 [ffff000194e1b920] machine_kexec at ffff0000080a265c #1 [ffff000194e1b980] __crash_kexec at ffff0000081b3ba8 #2 [ffff000194e1bb10] panic at ffff0000080ecc98 #3 [ffff000194e1bbf0] nmi_panic at ffff0000080ec7f4 #4 [ffff000194e1bc10] arm64_serror_panic at fff00000809019c #5 [ffff000194e1bc30] do_serror at ffff00000809039c #6 [ffff000194e1bd90] el1_error at ffff000008083e50 #7 [ffff000194e1bda0] __flush_icache_range at ffff0000080a9ec4 #8 [ffff000194e1be60] el0_svc_common at fff0000080977d8 #9 [ffff000194e1bea0] el0_svc_compat_handler at ffff0000080979b4 #10 [ffff000194e1bff0] el0_svc_compat at ffff0000008083874 PC: c90fe7f8 LR: c90ff09c SP: d2afa8e0 PSTATE: 800b0010 X12: c56e96e4 X11: d2afaa48 X10: d0ff1000 X9: d2afab68 x8: 000000d6 X7: 000f0002 X6: d3c61840 X5: d3c61001 X4: d3c03000 X3: 0004d54a x2: 00000000 x1: d3c61040 X0: d3c61000 New advanced test for Mavis Beacon teaches typing. In summary this is all we have to hand... > > Will > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel