From patchwork Wed May 15 09:17:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 164267 Delivered-To: patch@linaro.org Received: by 2002:a92:9e1a:0:0:0:0:0 with SMTP id q26csp511646ili; Wed, 15 May 2019 02:19:23 -0700 (PDT) X-Google-Smtp-Source: APXvYqxs33JSmu5+4dM9Q2KU/5rmKWzEqw0hnTa2BcVEV8JEHjwFNoos6w4K3t6T46/8JsyI7gnJ X-Received: by 2002:a17:902:9a0c:: with SMTP id v12mr43640135plp.184.1557911963440; Wed, 15 May 2019 02:19:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1557911963; cv=none; d=google.com; s=arc-20160816; b=vDWABE6/gXWFg96HnH0ET8COjzRKMlMIQyTTq6X5kLcJ4xPtt9/60VNofRYd/Wvlm+ A43G+aGBijv5AGtrJAVK43Gmg5AdoaZDdzmju83ym87O3cCzu2FNp+ySshlvEjHbyTBZ 564FmA/qVAtrRMxYV8GUcy9W3UC0B1Jv8S9CHN7bqbF4ud6JGhXKQmA8YG++6Pw+GoAx pk3NirZ+RzH/ddMiM41yVvdn3+ewXy22HljZxttT+21p8reskRaU2M+VZlnp60a0r46j oPFO+0GQU7Ho9Vxmwv3KPBUNbru2XFUCQ386/ZHTTU55jF7nQB6PP5tpouBbZ4ldbXOq d3kw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=afJVBnSxExDbefWhkwJ7eFaEs/95yEFPPKVGEOB2X2w=; b=EGYQNvQupmYJItO3uSnvAlyEPPPBmkXriV59JJ9qbMKyjaD9p6G/EKAGP7RpMqTYOi 3PwY+n8q4H0XDh24EH8PO6ojIw5AK+ul76Db5ieDl13CsC4aBkVGB/YL6LOUSjwwNr87 c0oIUWAXecT37+2L84Ff2T1Zh6OEn41m1gti1PBjZautDW1eUCa/RH9Iv87YbBFz7hfl CKs3uNFjTyx/Mrvwh7/Vw9bhbE/F54k+BYULexCa1V07GKxcprh354eefAb2Hrmt7Ufg XzqKtNF13CWA7+6VCCBRdeOMqE97e349NEiEEoX+LcEyaNLwjUW9vh5zG29XZdS42PN/ gtJg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 3si1535826pfp.288.2019.05.15.02.19.23; Wed, 15 May 2019 02:19:23 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=stable-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726212AbfEOJTW (ORCPT + 14 others); Wed, 15 May 2019 05:19:22 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:8195 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725871AbfEOJTW (ORCPT ); Wed, 15 May 2019 05:19:22 -0400 Received: from DGGEMS408-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 1D72BC7EB305D65CEB4E; Wed, 15 May 2019 17:19:21 +0800 (CST) Received: from FRA1000014316.huawei.com (100.126.230.97) by DGGEMS408-HUB.china.huawei.com (10.3.19.208) with Microsoft SMTP Server id 14.3.439.0; Wed, 15 May 2019 17:19:09 +0800 From: Jonathan Cameron To: CC: Jean-Philippe Brucker , , Will Deacon , Jonathan Cameron Subject: [PATCH 46/60] arm64: Clear OSDLR_EL1 on CPU boot Date: Wed, 15 May 2019 17:17:23 +0800 Message-ID: <20190515091737.18578-46-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190515091737.18578-1-Jonathan.Cameron@huawei.com> References: <20190515091737.18578-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [100.126.230.97] X-CFilter-Loop: Reflected Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jean-Philippe Brucker 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: Jonathan Cameron --- arch/arm64/kernel/debug-monitors.c | 1 + 1 file changed, 1 insertion(+) -- 2.19.1 diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c index 800486cc48239..555b6bd2f3d68 100644 --- 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;