From patchwork Fri May 19 20:32:07 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tyler Baicar X-Patchwork-Id: 9738085 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BCA9A601A1 for ; Fri, 19 May 2017 20:35:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C9EC628582 for ; Fri, 19 May 2017 20:35:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BD78728587; Fri, 19 May 2017 20:35:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5A5A528582 for ; Fri, 19 May 2017 20:35:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756801AbdESUc5 (ORCPT ); Fri, 19 May 2017 16:32:57 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:45958 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756756AbdESUcv (ORCPT ); Fri, 19 May 2017 16:32:51 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 1E82E60A08; Fri, 19 May 2017 20:32:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1495225966; bh=8MoU9U1zHtc9QNoQ9zz2cLnnEdhN8IhvSXghvu97pyE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Nch30japRtYey7v9uV3WUO0qIi+2XYdQh+1LlUrLLRwrjTwpTOG4O8NeAV/MtMDSX D8eh2CbBs2gWAeTOqJU2XkduObov+vVGhQUJjGyx4p2vzsKZJRSH/RQK62frwj8ACG a0idD7IHBnhkShiiIkIAgN/LTloxZZ3wdZ+lCSzM= Received: from tbaicar-lnx.qualcomm.com (unknown [129.46.14.132]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: tbaicar@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id C6206609FE; Fri, 19 May 2017 20:32:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1495225962; bh=8MoU9U1zHtc9QNoQ9zz2cLnnEdhN8IhvSXghvu97pyE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dwFXGu1smK5H6VAI2JYwLUcRaIbGXqmk7s+czeT6+qD29W4f4JNpkazJFQ3WqkKhs D1bpH5wwhJfw7GH3va3QfvyvnC0eokkzVxPd2BJ0DlJydpKlGp8bFDwDqQEcLXxHDo DYBoOMad870j+xZpYqjLxIjEbeamWGIK5hdobu6M= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org C6206609FE Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=tbaicar@codeaurora.org From: Tyler Baicar To: christoffer.dall@linaro.org, marc.zyngier@arm.com, pbonzini@redhat.com, rkrcmar@redhat.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, rjw@rjwysocki.net, lenb@kernel.org, matt@codeblueprint.co.uk, robert.moore@intel.com, lv.zheng@intel.com, nkaje@codeaurora.org, zjzhang@codeaurora.org, mark.rutland@arm.com, james.morse@arm.com, akpm@linux-foundation.org, eun.taik.lee@samsung.com, sandeepa.s.prabhu@gmail.com, labbott@redhat.com, shijie.huang@arm.com, rruigrok@codeaurora.org, paul.gortmaker@windriver.com, tn@semihalf.com, fu.wei@linaro.org, rostedt@goodmis.org, bristot@redhat.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-efi@vger.kernel.org, Suzuki.Poulose@arm.com, punit.agrawal@arm.com, astone@redhat.com, harba@codeaurora.org, hanjun.guo@linaro.org, john.garry@huawei.com, shiju.jose@huawei.com, joe@perches.com, bp@alien8.de, rafael@kernel.org, tony.luck@intel.com, gengdongjiu@huawei.com, xiexiuqi@huawei.com Cc: Tyler Baicar Subject: [PATCH V17 05/11] arm64: exception: handle Synchronous External Abort Date: Fri, 19 May 2017 14:32:07 -0600 Message-Id: <1495225933-4410-6-git-send-email-tbaicar@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1495225933-4410-1-git-send-email-tbaicar@codeaurora.org> References: <1495225933-4410-1-git-send-email-tbaicar@codeaurora.org> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP SEA exceptions are often caused by an uncorrected hardware error, and are handled when data abort and instruction abort exception classes have specific values for their Fault Status Code. When SEA occurs, before killing the process, report the error in the kernel logs. Update fault_info[] with specific SEA faults so that the new SEA handler is used. Signed-off-by: Tyler Baicar CC: Jonathan (Zhixiong) Zhang Reviewed-by: James Morse Acked-by: Catalin Marinas --- arch/arm64/include/asm/esr.h | 1 + arch/arm64/mm/fault.c | 45 ++++++++++++++++++++++++++++++++++---------- 2 files changed, 36 insertions(+), 10 deletions(-) diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h index 85997c0..28bf02e 100644 --- a/arch/arm64/include/asm/esr.h +++ b/arch/arm64/include/asm/esr.h @@ -83,6 +83,7 @@ #define ESR_ELx_WNR (UL(1) << 6) /* Shared ISS field definitions for Data/Instruction aborts */ +#define ESR_ELx_FnV (UL(1) << 10) #define ESR_ELx_EA (UL(1) << 9) #define ESR_ELx_S1PTW (UL(1) << 7) diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index 37b95df..6697816 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -522,6 +522,31 @@ static int do_bad(unsigned long addr, unsigned int esr, struct pt_regs *regs) return 1; } +/* + * This abort handler deals with Synchronous External Abort. + * It calls notifiers, and then returns "fault". + */ +static int do_sea(unsigned long addr, unsigned int esr, struct pt_regs *regs) +{ + struct siginfo info; + const struct fault_info *inf; + + inf = esr_to_fault_info(esr); + pr_err("Synchronous External Abort: %s (0x%08x) at 0x%016lx\n", + inf->name, esr, addr); + + info.si_signo = SIGBUS; + info.si_errno = 0; + info.si_code = 0; + if (esr & ESR_ELx_FnV) + info.si_addr = 0; + else + info.si_addr = (void __user *)addr; + arm64_notify_die("", regs, &info, esr); + + return 0; +} + static const struct fault_info fault_info[] = { { do_bad, SIGBUS, 0, "ttbr address size fault" }, { do_bad, SIGBUS, 0, "level 1 address size fault" }, @@ -539,22 +564,22 @@ static int do_bad(unsigned long addr, unsigned int esr, struct pt_regs *regs) { do_page_fault, SIGSEGV, SEGV_ACCERR, "level 1 permission fault" }, { do_page_fault, SIGSEGV, SEGV_ACCERR, "level 2 permission fault" }, { do_page_fault, SIGSEGV, SEGV_ACCERR, "level 3 permission fault" }, - { do_bad, SIGBUS, 0, "synchronous external abort" }, + { do_sea, SIGBUS, 0, "synchronous external abort" }, { do_bad, SIGBUS, 0, "unknown 17" }, { do_bad, SIGBUS, 0, "unknown 18" }, { do_bad, SIGBUS, 0, "unknown 19" }, - { do_bad, SIGBUS, 0, "synchronous external abort (translation table walk)" }, - { do_bad, SIGBUS, 0, "synchronous external abort (translation table walk)" }, - { do_bad, SIGBUS, 0, "synchronous external abort (translation table walk)" }, - { do_bad, SIGBUS, 0, "synchronous external abort (translation table walk)" }, - { do_bad, SIGBUS, 0, "synchronous parity error" }, + { do_sea, SIGBUS, 0, "level 0 (translation table walk)" }, + { do_sea, SIGBUS, 0, "level 1 (translation table walk)" }, + { do_sea, SIGBUS, 0, "level 2 (translation table walk)" }, + { do_sea, SIGBUS, 0, "level 3 (translation table walk)" }, + { do_sea, SIGBUS, 0, "synchronous parity or ECC error" }, { do_bad, SIGBUS, 0, "unknown 25" }, { do_bad, SIGBUS, 0, "unknown 26" }, { do_bad, SIGBUS, 0, "unknown 27" }, - { do_bad, SIGBUS, 0, "synchronous parity error (translation table walk)" }, - { do_bad, SIGBUS, 0, "synchronous parity error (translation table walk)" }, - { do_bad, SIGBUS, 0, "synchronous parity error (translation table walk)" }, - { do_bad, SIGBUS, 0, "synchronous parity error (translation table walk)" }, + { do_sea, SIGBUS, 0, "level 0 synchronous parity error (translation table walk)" }, + { do_sea, SIGBUS, 0, "level 1 synchronous parity error (translation table walk)" }, + { do_sea, SIGBUS, 0, "level 2 synchronous parity error (translation table walk)" }, + { do_sea, SIGBUS, 0, "level 3 synchronous parity error (translation table walk)" }, { do_bad, SIGBUS, 0, "unknown 32" }, { do_alignment_fault, SIGBUS, BUS_ADRALN, "alignment fault" }, { do_bad, SIGBUS, 0, "unknown 34" },