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=-0.8 required=3.0 tests=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 F35ADC19759 for ; Thu, 1 Aug 2019 11:06:06 +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 C8F5D206A2 for ; Thu, 1 Aug 2019 11:06:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C8F5D206A2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:54610 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1ht8uM-0004r0-38 for qemu-devel@archiver.kernel.org; Thu, 01 Aug 2019 07:06:06 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56343) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1ht8tw-0004QV-Pw for qemu-devel@nongnu.org; Thu, 01 Aug 2019 07:05:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ht8tv-0001qR-LI for qemu-devel@nongnu.org; Thu, 01 Aug 2019 07:05:40 -0400 Received: from indium.canonical.com ([91.189.90.7]:43868) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ht8tv-0001q0-Fa for qemu-devel@nongnu.org; Thu, 01 Aug 2019 07:05:39 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1ht8tu-0008Qr-6H for ; Thu, 01 Aug 2019 11:05:38 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 2746E2E80C7 for ; Thu, 1 Aug 2019 11:05:38 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Thu, 01 Aug 2019 11:00:21 -0000 From: Peter Maydell To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=In Progress; importance=Undecided; assignee=None; X-Launchpad-Bug-Tags: arm mprofile tcg testcase X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: buckfobb pmaydell X-Launchpad-Bug-Reporter: KD (buckfobb) X-Launchpad-Bug-Modifier: Peter Maydell (pmaydell) References: <156452233283.15483.3370838341008169030.malonedeb@wampee.canonical.com> Message-Id: <156465722187.7381.18315789088975311216.malone@soybean.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: 5306365835a7adeda6039e316fb336fa5b300d04 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 91.189.90.7 Subject: [Qemu-devel] [Bug 1838475] Re: 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" I think this patch should fix this bug: https://patchew.org/QEMU/20190801105742.20036-1-peter.maydell@linaro.org/ ** Changed in: qemu Status: New =3D> In Progress -- = 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: In Progress 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