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=-0.7 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 29933C433FF for ; Tue, 30 Jul 2019 22:06:26 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EE32A206A2 for ; Tue, 30 Jul 2019 22:06:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EE32A206A2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36618 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hsaGG-0007n4-UB for qemu-devel@archiver.kernel.org; Tue, 30 Jul 2019 18:06:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42859) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hsZs3-0004Ba-1W for qemu-devel@nongnu.org; Tue, 30 Jul 2019 17:41:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hsZs0-00035z-T9 for qemu-devel@nongnu.org; Tue, 30 Jul 2019 17:41:22 -0400 Received: from indium.canonical.com ([91.189.90.7]:48072) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1hsZrr-0002ze-G0 for qemu-devel@nongnu.org; Tue, 30 Jul 2019 17:41:14 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1hsZrX-0001Uz-ES for ; Tue, 30 Jul 2019 21:40:51 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 6BD802E80C9 for ; Tue, 30 Jul 2019 21:40:51 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Tue, 30 Jul 2019 21:32:12 -0000 From: KD To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=New; importance=Undecided; assignee=None; X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: buckfobb X-Launchpad-Bug-Reporter: KD (buckfobb) X-Launchpad-Bug-Modifier: KD (buckfobb) Message-Id: <156452233283.15483.3370838341008169030.malonedeb@wampee.canonical.com> X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="19012"; Instance="launchpad-lazr.conf" X-Launchpad-Hash: 1236ba116782d3d81e09d7c95e5d4ddf9ca965ef X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 91.189.90.7 X-Mailman-Approved-At: Tue, 30 Jul 2019 18:04:22 -0400 Subject: [Qemu-devel] [Bug 1838475] [NEW] qemu-system-arm exits when cortex-m4 floating point used and irq occurs X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1838475 <1838475@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Public bug reported: qemu-system-arm exits with "...Secure UsageFault with CFSR.NOCP because NSACR.CP10 prevents stacking F= P regs ...taking pending nonsecure exception 3 Taking exception 7 [Breakpoint] qemu: fatal: Lockup: can't escalate 3 to HardFault (current priority -1)" = when emulating Cortex-m4, executing at least 1 floating point instruction, and then an irq (e.g. sys tick) occurring. CPACR.CP10 and CPACR.CP11 are set to 0x3 respectively prior to executing the fp instructions. NOTE: NSACR does not appear to be a cortex m4 register. Attached is a simplified elf to repro the issue. The qemu command line is: "qemu-system-arm --gdb tcp::1234 -cpu cortex-m4 -machine lm3s6965evb -nographic -semihosting-config enable=3Don,target=3Dnative -kernel QemuExitWhenUsingFPAndIRQOccurs.elf -d int" ** Affects: qemu Importance: Undecided Status: New ** Attachment added: "QemuExitWhenUsingFPAndIRQOccurs.elf" https://bugs.launchpad.net/bugs/1838475/+attachment/5280090/+files/QemuE= xitWhenUsingFPAndIRQOccurs.elf -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1838475 Title: qemu-system-arm exits when cortex-m4 floating point used and irq occurs Status in QEMU: New Bug description: qemu-system-arm exits with "...Secure UsageFault with CFSR.NOCP because NSACR.CP10 prevents stacking= FP regs ...taking pending nonsecure exception 3 Taking exception 7 [Breakpoint] qemu: fatal: Lockup: can't escalate 3 to HardFault (current priority -1)" = when emulating Cortex-m4, executing at least 1 floating point instruction, and then an irq (e.g. sys tick) occurring. CPACR.CP10 and CPACR.CP11 are set to 0x3 respectively prior to executing the fp instructions. NOTE: NSACR does not appear to be a cortex m4 register. Attached is a simplified elf to repro the issue. The qemu command line is: "qemu-system-arm --gdb tcp::1234 -cpu cortex-m4 -machine lm3s6965evb -nographic -semihosting-config enable=3Don,target=3Dnative -kernel QemuExitWhenUsingFPAndIRQOccurs.elf -d int" To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1838475/+subscriptions