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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9370C433F5 for ; Tue, 17 May 2022 10:48:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344622AbiEQKsi (ORCPT ); Tue, 17 May 2022 06:48:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48794 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244894AbiEQKpK (ORCPT ); Tue, 17 May 2022 06:45:10 -0400 Received: from mail-wm1-x32d.google.com (mail-wm1-x32d.google.com [IPv6:2a00:1450:4864:20::32d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 49E6D326D7 for ; Tue, 17 May 2022 03:45:09 -0700 (PDT) Received: by mail-wm1-x32d.google.com with SMTP id k26so2399196wms.1 for ; Tue, 17 May 2022 03:45:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=NFw8Ijg8sMBiPh1wpuDsVjM9V1UC65bp4/9nHH1DnNw=; b=bZyZnczu9kXL7CaM1OEydco+Bx2UiuBb6JjKg3p63R+zyYNF2kIgpjZNHUDTKgLaRj nQCtf0FvHcSArkv8fh+9LkFHKwRiLIiWDvNk3xkxmyCdPeGQqoW5E75TGQzj2SNTcp7e qZioXCjblkUC4T2VZnJaPLVHd5A25uGZC/M1RVq4503tJzR2oM9pmHir76ULMBSqrUpe pr0CwACByQwIyWiOpFMoJ6gpH/0uK1hS1dsG//IA1ER3WU5z04U7pdyoQJJ+QbolwShU E4/QC4cFpX4Qy8nG8r0oVVIag+YRR+U8bFeMFX4XqSJ3BOGa3FFb06yPXldQ0/75TLKF /JPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=NFw8Ijg8sMBiPh1wpuDsVjM9V1UC65bp4/9nHH1DnNw=; b=nlurWCPZTzllqVlJNdhBkA8EX83cOHdGnWerYADyhPLKVbd8Ydu6x6/yK85ZB2ynEV JOGicbwJQ9oEpJbyua7AYKpdk6T23Qo7PVVrCmNbMwe73cpZLE6qeoOi+0KrGyO0REnP 1rG2OQ3RsWQd5IOwgjas9g+eRSTMuCwPGQlHEH822sJvul+EpbIxv0Y5symM+G2UALSe bZdlRbPxQF3Ntp2mnEPdT8nqIwVEBNM9vljumlqEdNqpOLCqF3urfy4EinXVNCPVU5Zu /w/p3EKoTVLJR59Kk+knP6icNs56nvnU9Qu2q1gm+ISP/y9D5csVF+scjNeaifzz24zw IlOQ== X-Gm-Message-State: AOAM531HW0LccHY7QVDj7xpAhUB3ia2RwW/4Rip5PCkGTR9EVU/ntWUS 2QnOjFrZ2wHXTwfPBI51upE= X-Google-Smtp-Source: ABdhPJydl/8uv8g7gEdazrh9E2zyOqnxpqVsFoRL1ME0pKLa7R1RE38SEDCqS4EerY4OBA6arxxm7g== X-Received: by 2002:a05:600c:1c0e:b0:394:66af:ef0f with SMTP id j14-20020a05600c1c0e00b0039466afef0fmr30752373wms.48.1652784307733; Tue, 17 May 2022 03:45:07 -0700 (PDT) Received: from octofox.metropolis ([178.134.210.144]) by smtp.gmail.com with ESMTPSA id r5-20020adfbb05000000b0020d00174eabsm8612218wrg.94.2022.05.17.03.45.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 May 2022 03:45:07 -0700 (PDT) From: Max Filippov To: linux-xtensa@linux-xtensa.org Cc: Chris Zankel , linux-kernel@vger.kernel.org, Max Filippov Subject: [PATCH v3 0/3] xtensa: add division by zero exception handler Date: Tue, 17 May 2022 03:44:55 -0700 Message-Id: <20220517104458.257799-1-jcmvbkbc@gmail.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, this series adds handlers for hardware and artificial division by zero exceptions and improves call0 ABI probing in the presence of unrelated illegal instructions. Changes v2->v3: - simplify artificial division by 0 handler Changes v1->v2: - split ABI probing improvement from the artificial division by 0 - don't limit artificial division by 0 pattern detection to configurations without HW division opcodes, do it always Max Filippov (3): xtensa: add trap handler for division by zero xtensa: support artificial division by 0 exception xtensa: improve call0 ABI probing arch/xtensa/include/asm/thread_info.h | 4 +++ arch/xtensa/kernel/asm-offsets.c | 3 ++ arch/xtensa/kernel/entry.S | 5 ++++ arch/xtensa/kernel/traps.c | 43 ++++++++++++++++++++++++++- 4 files changed, 54 insertions(+), 1 deletion(-) -- 2.30.2