From patchwork Tue Oct 13 21:30:51 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Salyzyn X-Patchwork-Id: 7389041 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CD346BEEA4 for ; Tue, 13 Oct 2015 21:33:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 232BE20807 for ; Tue, 13 Oct 2015 21:33:50 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5012320803 for ; Tue, 13 Oct 2015 21:33:49 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zm7Aj-00033A-LY; Tue, 13 Oct 2015 21:31:49 +0000 Received: from mail-pa0-x22c.google.com ([2607:f8b0:400e:c03::22c]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zm7Ag-0002yz-Jd for linux-arm-kernel@lists.infradead.org; Tue, 13 Oct 2015 21:31:47 +0000 Received: by pabrc13 with SMTP id rc13so32375256pab.0 for ; Tue, 13 Oct 2015 14:31:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=android.com; s=20120917; h=from:to:cc:subject:date:message-id; bh=dmwLe7WLZrle+iaelT6pglEB2Spe6iTZgnoK1gwOO4s=; b=mujVsMequmB4YQHL4vIMtvB1I/InqFxal33hKP9yxjsI8Z6iPOJVX1fmjtW9orATJu eediWy+uLQReew7SPOXULaEAKGQjs3XasR53Ibzx9x37t7zALJduuMuw4P0AC1UXI7c5 KiwxsHk2jxEvA2sja5gR8QiknD9kroFF3Hn88yqI/0nnNJ65lVYQ+tHjr7YSI5F9EzWl elMJZwOtT2ojH5fgiIA+dC/TYYk4iGlLBtVG6f6Fmk0lr4cjs/tscsr7yidOt7btNcdt EgLtagCp536xOIF4sB4U0nRNIv5NsHlNh+d8mf2Dbk8gfNqBQR5gJfVamqU0taIpVcGA R7Gw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=dmwLe7WLZrle+iaelT6pglEB2Spe6iTZgnoK1gwOO4s=; b=HLLfXL4tZz1pTLdo4wHSBVSZHvQ2AeKvsTmrhe5k6SvL1qPUIkNXuMhEPHVfw4UVlk Roa/pF1npiQ2NDhGTp8e3cZDGKiRqtD5VnuPk5MO87z4294TzyPcJOPcmET1bB1iPwf6 SEjWPG3ZbQsBxE5eVG+by7aJnAAxSMpSVYl/fvRu2MqpFYaGEJnlr3ozM7eHO1AGqukU 3OyLCrE/qkSz/VGCeN2+u+2V1NIYNy8gVd2Falx4nl8OTud5HXCQnhJFWLGWyEoyVovv PoxFwdOvOVLgo8RXlg1QExHCDQeS0T3niFXDOIREnmuUlCMd7s3KyP9EYiXIDfqB5tJ/ Vicg== X-Gm-Message-State: ALoCoQlfPPjj6iYwI6ArwdE8MOPbOLwPxshiIxtAVVKjCOfjCR/es3F+yABkN0ypKJbnm1hXunen X-Received: by 10.67.30.74 with SMTP id kc10mr41930323pad.147.1444771885200; Tue, 13 Oct 2015 14:31:25 -0700 (PDT) Received: from virago.mtv.corp.google.com ([172.22.122.154]) by smtp.gmail.com with ESMTPSA id ch3sm5617369pbb.18.2015.10.13.14.31.24 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 13 Oct 2015 14:31:24 -0700 (PDT) From: Mark Salyzyn To: linux-kernel@vger.kernel.org Subject: Aarch32 user space PC alignment exception Date: Tue, 13 Oct 2015 14:30:51 -0700 Message-Id: <1444771874-22714-1-git-send-email-salyzyn@android.com> X-Mailer: git-send-email 2.6.0.rc2.230.g3dd15c0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151013_143146_682783_7B32773E X-CRM114-Status: GOOD ( 10.34 ) X-Spam-Score: -2.7 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Daniel Thompson , Marc Zyngier , Catalin Marinas , Will Deacon , Mark Salyzyn , AKASHI Takahiro , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP armv7 does not have a PC alignment exception. armv8 Aarch32 user space however can produce a PC alignment exception. Add handler so the we do not dump an unexpected stack trace in the logs. Signed-off-by: Mark Salyzyn --- arch/arm64/kernel/entry.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 4306c93..7ed3d75 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -430,6 +430,8 @@ el0_sync_compat: b.eq el0_fpsimd_acc cmp x24, #ESR_ELx_EC_FP_EXC32 // FP/ASIMD exception b.eq el0_fpsimd_exc + cmp x24, #ESR_ELx_EC_PC_ALIGN // pc alignment exception + b.eq el0_sp_pc cmp x24, #ESR_ELx_EC_UNKNOWN // unknown exception in EL0 b.eq el0_undef cmp x24, #ESR_ELx_EC_CP15_32 // CP15 MRC/MCR trap