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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 5F97FC10DCE for ; Wed, 18 Mar 2020 10:32:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2AEF320770 for ; Wed, 18 Mar 2020 10:32:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="eJyQsthw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727900AbgCRKcS (ORCPT ); Wed, 18 Mar 2020 06:32:18 -0400 Received: from mail.skyhub.de ([5.9.137.197]:34660 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727572AbgCRKcQ (ORCPT ); Wed, 18 Mar 2020 06:32:16 -0400 Received: from zn.tnic (p200300EC2F0B45003CD01F459A0D41B0.dip0.t-ipconnect.de [IPv6:2003:ec:2f0b:4500:3cd0:1f45:9a0d:41b0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id B61581EC0BEA; Wed, 18 Mar 2020 11:32:14 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1584527534; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=/OV7bmNavmDBih6YnNCbo6Axh98P53HfUokcmUccP4E=; b=eJyQsthwWLJ1NZsg/zzf7W7rIbrR0am8FVcd3r3fx87R4zQWkT9yUQbKNyjISfj7D/4MXg vQRkAl3dWGsd/0lA9BGDdA3A07fM4sXRwRJZBRLsf50R+EHhqR0MW74+c+efxRg72y0mTj w+MiKfos/nnKYx7aBvdOYxMexQTIcbc= Date: Wed, 18 Mar 2020 11:32:19 +0100 From: Borislav Petkov To: Xiaoyao Li Cc: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] x86/cpufeatures: make bits in cpu_caps_cleared[] and cpu_cpus_set[] exclusive Message-ID: <20200318103219.GA4377@zn.tnic> References: <20200318061624.150313-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200318061624.150313-1-xiaoyao.li@intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 18, 2020 at 02:16:24PM +0800, Xiaoyao Li wrote: > In apply_forced_caps(), cpu_caps_set[] overrides cpu_caps_cleared[], so > that setup_clear_cpu_cap() cannot clear one cap if setup_force_cpu_cap() > sets the cap before it. Context pls: what is the observation, what are you trying to do, reproducer, etc? Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette