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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 1D992C04E87 for ; Mon, 20 May 2019 12:44:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DEA0321726 for ; Mon, 20 May 2019 12:44:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558356299; bh=any/DlHXg37Ff7AbRPFC1GetjoVK2j3ZkSLPNafzbrk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MEO9CeQlUW81bH6R1wsseNQSxn/Cpcha+97xa4ZdKVmCV/JAYo5cxvfSVTrvQURdV jFMozoqWfS6OftnhJ1U3oGjz3rDqgh2kbb47tjG7wTmdzflfOKrmIDgnpiosefhPBw yLjJ1OwxZZVLdnFHrEz8KWmmzh5dm2eHFR+xFINY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389484AbfETM1X (ORCPT ); Mon, 20 May 2019 08:27:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:42962 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389479AbfETM1W (ORCPT ); Mon, 20 May 2019 08:27:22 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6AB5A21019; Mon, 20 May 2019 12:27:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558355241; bh=any/DlHXg37Ff7AbRPFC1GetjoVK2j3ZkSLPNafzbrk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NH7sqQj1mNPgKvfjvQV/SUFyP48IWwdxUuJjNLb6Dugx+sQMNiDBMVlgizFeCmSJa 6mOE1WjvwZzlBWU4K/KnxTr7ibMXtZpeqT5G2Ah+quf9mTuvtseoB+SZXMDGjMTPdh G6k5oHg/ZS9D8TnKt+SmtfCZhKkIe1H0M8I6/qks= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jean-Philippe Brucker , Will Deacon Subject: [PATCH 5.0 017/123] arm64: Clear OSDLR_EL1 on CPU boot Date: Mon, 20 May 2019 14:13:17 +0200 Message-Id: <20190520115246.116346676@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190520115245.439864225@linuxfoundation.org> References: <20190520115245.439864225@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jean-Philippe Brucker commit 6fda41bf12615ee7c3ddac88155099b1a8cf8d00 upstream. Some firmwares may reboot CPUs with OS Double Lock set. Make sure that it is unlocked, in order to use debug exceptions. Cc: Signed-off-by: Jean-Philippe Brucker Signed-off-by: Will Deacon Signed-off-by: Greg Kroah-Hartman --- arch/arm64/kernel/debug-monitors.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/arm64/kernel/debug-monitors.c +++ b/arch/arm64/kernel/debug-monitors.c @@ -135,6 +135,7 @@ NOKPROBE_SYMBOL(disable_debug_monitors); */ static int clear_os_lock(unsigned int cpu) { + write_sysreg(0, osdlr_el1); write_sysreg(0, oslar_el1); isb(); return 0;