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=-4.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 4AB34C433E1 for ; Fri, 14 Aug 2020 08:17:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 234C720829 for ; Fri, 14 Aug 2020 08:17:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597393032; bh=YgO/v+wl3RV6ZsbHn7D3JlpwNdtDIHAfZh9E27YIQpk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=Y72xPPF8Kf2Xxh7tI6iFxRe2eyc+ypM7w5Zwx2krh6I9KFM9WzBuYDuHIT2mRr8RJ us8VKa10SkwWfyFpU8rpjdDDJbK7ySmI7AiZmaT2rEV+YbptYHYVrfZF89PuARgkiN WdYgidcnPbQPong7elmQhYeiYkbCFyxzryz56HZg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727770AbgHNIRK (ORCPT ); Fri, 14 Aug 2020 04:17:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:55340 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726641AbgHNIRK (ORCPT ); Fri, 14 Aug 2020 04:17:10 -0400 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (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 C69AD206B2; Fri, 14 Aug 2020 08:17:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597393029; bh=YgO/v+wl3RV6ZsbHn7D3JlpwNdtDIHAfZh9E27YIQpk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=WxJFKyohdJoDrxE3CmmxAdxJPPTni1dRkGLrqOaUzEwjQbwBGDQ9rpVWSELhh1z+9 ToDvK8bcMSJoBVXkiIQveJMq7ypNmBabnyga3egg6Prvr0PAy77JwYJWbuP2kvP/JD 8fV95VGaXgxHcLjxQlIpC4yI1JoSsPEZ1BqHEkAE= Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1k6Utg-0026vn-CN; Fri, 14 Aug 2020 09:17:08 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Fri, 14 Aug 2020 09:17:08 +0100 From: Marc Zyngier To: Sai Prakash Ranjan Cc: Will Deacon , Catalin Marinas , Andre Przywara , Mark Rutland , Suzuki K Poulose , Stephen Boyd , Douglas Anderson , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org Subject: Re: [PATCH] arm64: Add KRYO4XX gold CPU core to spectre-v2 safe list In-Reply-To: References: <20200813081834.13576-1-saiprakash.ranjan@codeaurora.org> <20200813090324.GB9829@willie-the-truck> <89f0f41514e547533c3fa66364e5a2ac@codeaurora.org> <20200813094041.GA9894@willie-the-truck> <368280026c8af5b5a58a52c1e19cfae9@codeaurora.org> <8ffd22d5926aedda0c9fa6ea429fd84e@kernel.org> User-Agent: Roundcube Webmail/1.4.7 Message-ID: <961724681d6d3f8c37a4e3c8facbdea3@kernel.org> X-Sender: maz@kernel.org X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: saiprakash.ranjan@codeaurora.org, will@kernel.org, catalin.marinas@arm.com, andre.przywara@arm.com, mark.rutland@arm.com, suzuki.poulose@arm.com, swboyd@chromium.org, dianders@chromium.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-08-14 05:34, Sai Prakash Ranjan wrote: > On 2020-08-13 23:29, Marc Zyngier wrote: [...] >> We'd need to disable the late onlining of CPUs that would change >> the mitigation state, and this is... ugly. >> > > Ugh, yes indeed and here I was thinking that these things are > straightforward :( It never is. Big-little is a broken concept. I'll try and think of something next week, as I'm pretty swamped at the moment. M. -- Jazz is not dead. It just smells funny...