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 87787ECAAD3 for ; Fri, 9 Sep 2022 07:33:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230512AbiIIHdv (ORCPT ); Fri, 9 Sep 2022 03:33:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59788 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229659AbiIIHdo (ORCPT ); Fri, 9 Sep 2022 03:33:44 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 594DCB40D3 for ; Fri, 9 Sep 2022 00:33:40 -0700 (PDT) Received: from dggemv704-chm.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4MP72Z4j5ZznVCJ; Fri, 9 Sep 2022 15:31:02 +0800 (CST) Received: from kwepemm600007.china.huawei.com (7.193.23.208) by dggemv704-chm.china.huawei.com (10.3.19.47) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 9 Sep 2022 15:33:38 +0800 Received: from [10.174.185.210] (10.174.185.210) by kwepemm600007.china.huawei.com (7.193.23.208) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 9 Sep 2022 15:33:37 +0800 From: Kunkun Jiang To: Mark Rutland , Marc Zyngier , "Daniel Lezcano" , Thomas Gleixner CC: "wanghaibin.wang@huawei.com" , Zenghui Yu , "moderated list:ARM ARCHITECTED TIMER DRIVER" , Subject: A question about Cortex-A73 erratum 858921 Message-ID: Date: Fri, 9 Sep 2022 15:31:43 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Originating-IP: [10.174.185.210] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemm600007.china.huawei.com (7.193.23.208) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, Recently I am learning the code related to Arm arch timer. I found that the Cortex-A73 erratum 858921 does not set the corresponding callback functions: set_next_event_phys and set_next_event_virt like other erratums. Won't it get the wrong value when reading the counter during setting next event? Looking forward to your reply. Thanks, Kunkun Jiang