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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 B185FC433DF for ; Mon, 15 Jun 2020 11:35:18 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 8482120663 for ; Mon, 15 Jun 2020 11:35:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dmteh4Bv"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="kJtUHq/k" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8482120663 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=4k2vt3LVmg6Rysx4tpZL7/0zWsGORBeS33qT+MlaG7g=; b=dmteh4BvbYDDNv 0mOkdHgoCMbpndAa+u2JEit/pnaWtWD0fkM9NfVR/sncfxmmShHw5QTsBZhz1p6x1Z8E1gmxfFIhB 8u0ALpmpjELCO/y7rr0PINs3uQnI19kV3+LMo2esNfgiwmLjcJ9txkptmBkjAjOQ6DCoZHVZvY0TN drHVk1kjR4HNKlIWPCMhdUrwAfPKeR3YBjKaVNwS0sz35Fm35rkrIEbpjT3Fb5mCq7c0elmiIXMR8 df6/g1RDc8MwWVFbTiJRFnsMbz11SJGOzZwXH82+zl9cLcBRXfLQtK7xDtm3zlUFddIdOOeVN+nZE 45YMbs98xWstmQLfHgdA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jknON-00069q-Ow; Mon, 15 Jun 2020 11:35:07 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jknOJ-0005Sv-Rp for linux-arm-kernel@lists.infradead.org; Mon, 15 Jun 2020 11:35:05 +0000 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4AA1F20663; Mon, 15 Jun 2020 11:35:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592220903; bh=U+Ra4+MGv3itok8OivvDYnef7h9H+I9uORJTiZA5H24=; h=From:To:Cc:Subject:Date:From; b=kJtUHq/k/VLVC+l+pRT1x87+uIKlIEIeZu9GmwQtgKLi5vTCcPeuZE4TGEZbmcd/W 0lihwNWeD6TQuj8VP1j5mj05dXFAgt1+xRLcqPveW6rxfFc0bP8QrSgZfFrIKUpQ1c 22T9WLczH0bpRQmDbrLX4MPpe366f7glYJfF8qTk= From: Will Deacon To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] arm64: traps: Dump registers prior to panic() in bad_mode() Date: Mon, 15 Jun 2020 12:34:58 +0100 Message-Id: <20200615113458.2884-1-will@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200615_043503_926597_A9889AAA X-CRM114-Status: GOOD ( 11.18 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Will Deacon , Mark Brown , kernel-team@android.com, Catalin Marinas Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org When panicing due to an unknown/unhandled exception at EL1, dump the registers of the faulting context so that it's easier to figure out what went wrong. In particular, this makes it a lot easier to debug in-kernel BTI failures since it pretty-prints PSTATE.BTYPE in the crash log. Cc: Mark Brown Cc: Mark Rutland Cc: Catalin Marinas Signed-off-by: Will Deacon --- arch/arm64/kernel/traps.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 50cc30acf106..f1869e5bd743 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -812,6 +812,8 @@ asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr) pr_crit("Bad mode in %s handler detected on CPU%d, code 0x%08x -- %s\n", handler[reason], smp_processor_id(), esr, esr_get_class_string(esr)); + if (regs) + __show_regs(regs); local_daif_mask(); panic("bad mode"); -- 2.27.0.290.gba653c62da-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel