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=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 202ADC433DB for ; Thu, 28 Jan 2021 10:45:46 +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 5968D64DCC for ; Thu, 28 Jan 2021 10:45:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5968D64DCC 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]:54890 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l54o4-0001vo-DE for qemu-devel@archiver.kernel.org; Thu, 28 Jan 2021 05:45:44 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:51358) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l54mp-0001Jv-Fq for qemu-devel@nongnu.org; Thu, 28 Jan 2021 05:44:27 -0500 Received: from mail-ej1-x62b.google.com ([2a00:1450:4864:20::62b]:44392) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1l54mn-0002uQ-RM for qemu-devel@nongnu.org; Thu, 28 Jan 2021 05:44:27 -0500 Received: by mail-ej1-x62b.google.com with SMTP id w1so6976540ejf.11 for ; Thu, 28 Jan 2021 02:44:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=hwxWhuPAeBOGG7cxyNlAbfsJe23zd190HfsFXc5SNv0=; b=TT+1b72xpvG43lT3FgHLt1u44+bwNkKZyv7VGVRiYe3vkd+5wEyAr2Hl6IMqJQ/21d P0q+z12TwsxsYsMNSj2p5lUs+dxw6tqgAYKVyK3gFtmzrNtKQIe4kHPoCUBuSFo8wQ83 ljEjCxiEVHMHmspItr7qV7aCFsmOyCVwWwuiBmXWsxLLRhyFfdhQDpTOxmAUm73fqQzd QYZAYpry0GuqhFDKoK+6Ooef2ErvcbRnqYQQJuuaueaglAzehsBJAJQxIOv0WoKQ9NFr lTFlOW0WVJRtooRfYwJMmEgn+davoNwnEccdw1bMS/TWUa75jv7XQqXqHh0HL/W61G+c jsyg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=hwxWhuPAeBOGG7cxyNlAbfsJe23zd190HfsFXc5SNv0=; b=H8YrvDAIieOvPBp3Tdcl48smOM+NDBc+FlYnusR9IqEbrG4YMjMe1IazCDXXQJWJD/ 4lz387NmQPEOtl56GpWG0sBVyJBj2WxD41DIRKRI4npDIDEBug+OXd4tWWcW0qbxhdmu Xy2QfvBdyjRXic2AGwjnI8MJSCnodZA3CFnJrA6VcFe/7ZWTp/86OnMXm28PLfkvIjyN pkASm4wdoiPGqyODLQHOB4NY2b5/mtek2OuFc1i2v8R807mrD6/N1kasIr2NKABVkdcP nfWQBNj0xTSBz/FGVj7vvGksy4DjLagVsVMEj8iIdrR+Dj4kRAxl2YNl3JZEi8MO7sUN ljTw== X-Gm-Message-State: AOAM530SdauuIP3ptahixBL8uL7NdlPKRaqq5bXU3IJPrK7plMKmB8Uc 9EEZy+bK+wJO/WWeQErblVJint5WDgWLk124QJ2QCw== X-Google-Smtp-Source: ABdhPJxZDsq1yHO8WIHLriNMQdyPFE5TJ2S+pRVK3vGazE9pk4bvAI3GQMZnhgEjq1l0QQSfAJNid67JflJrpdYseew= X-Received: by 2002:a17:906:4002:: with SMTP id v2mr6504423ejj.85.1611830664023; Thu, 28 Jan 2021 02:44:24 -0800 (PST) MIME-Version: 1.0 References: <20210115224645.1196742-1-richard.henderson@linaro.org> <20210115224645.1196742-19-richard.henderson@linaro.org> In-Reply-To: From: Peter Maydell Date: Thu, 28 Jan 2021 10:44:13 +0000 Message-ID: Subject: Re: [PATCH v3 18/21] linux-user/aarch64: Signal SEGV_MTEAERR for async tag check error To: Richard Henderson Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2a00:1450:4864:20::62b; envelope-from=peter.maydell@linaro.org; helo=mail-ej1-x62b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-arm , QEMU Developers Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, 28 Jan 2021 at 08:49, Richard Henderson wrote: > > On 1/22/21 3:59 AM, Peter Maydell wrote: > > Does it work if we just always queue the SEGV on exit from cpu_exec() > > and let the signal handling machinery prioritize if we also pend > > some other signal because this was an EXCP_UDEF or whatever? > > It would be neater if we could keep the fault-check outside the > > switch (trapnr) somehow. > > I would think so. I'll try that. In particular it seems worth testing whether 'singlestep in gdbstub over an insn that takes an async MTE fault' has reasonable user-facing behaviour. thanks -- PMM