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=-10.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 D1665C433E0 for ; Mon, 25 Jan 2021 12:15:44 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 425D722B3B for ; Mon, 25 Jan 2021 12:15:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 425D722B3B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id B67CA4B5C3; Mon, 25 Jan 2021 07:15:43 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id F-KPYvfbwQYP; Mon, 25 Jan 2021 07:15:41 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id E59AC4B5D5; Mon, 25 Jan 2021 07:15:41 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 9BA774B5C3 for ; Mon, 25 Jan 2021 07:15:40 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jctYb7mnNdH9 for ; Mon, 25 Jan 2021 07:15:39 -0500 (EST) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 958CC4B5A4 for ; Mon, 25 Jan 2021 07:15:39 -0500 (EST) Received: by mail.kernel.org (Postfix) with ESMTPSA id C16F42231F; Mon, 25 Jan 2021 12:15:35 +0000 (UTC) Date: Mon, 25 Jan 2021 12:15:33 +0000 From: Catalin Marinas To: Marc Zyngier Subject: Re: [PATCH v5 09/21] arm64: cpufeature: Add global feature override facility Message-ID: <20210125121532.GE25360@gaia> References: <20210125105019.2946057-1-maz@kernel.org> <20210125105019.2946057-10-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210125105019.2946057-10-maz@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: Prasad Sodagudi , Srinivas Ramana , linux-kernel@vger.kernel.org, Ard Biesheuvel , Ajay Patil , kernel-team@android.com, Will Deacon , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On Mon, Jan 25, 2021 at 10:50:07AM +0000, Marc Zyngier wrote: > Add a facility to globally override a feature, no matter what > the HW says. Yes, this sounds dangerous, but we do respect the > "safe" value for a given feature. This doesn't mean the user > doesn't need to know what they are doing. > > Nothing uses this yet, so we are pretty safe. For now. > > Signed-off-by: Marc Zyngier > Reviewed-by: Suzuki K Poulose > Acked-by: David Brazdil That's more readable with a single pointer. Reviewed-by: Catalin Marinas _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm