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=-5.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,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 0936FC433DF for ; Fri, 14 Aug 2020 19:04:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C434720768 for ; Fri, 14 Aug 2020 19:04:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Or4lqbqw" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C434720768 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:40602 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k6ezl-0005Ip-4C for qemu-devel@archiver.kernel.org; Fri, 14 Aug 2020 15:04:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48474) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k6ezB-0004nV-8Q for qemu-devel@nongnu.org; Fri, 14 Aug 2020 15:03:29 -0400 Received: from mail-pl1-x641.google.com ([2607:f8b0:4864:20::641]:37278) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k6ez9-0002BH-U8 for qemu-devel@nongnu.org; Fri, 14 Aug 2020 15:03:28 -0400 Received: by mail-pl1-x641.google.com with SMTP id v5so2430826plo.4 for ; Fri, 14 Aug 2020 12:03:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=CeVWo1oyLHlrkCpHXScojQj5RFMRVg5d2AH7RmCjzYY=; b=Or4lqbqwuVOuKCM0tL4c3quysXaXvaIz8OoW+Ivb3qFJ7orFklbDtGWnn3H/b6uUhU Ka2XXBuL7JQ/hC8FMYZglbmttF3bzpNByFPKoI++JL5r0wX3NPm9shLRvZXXDRMJGfY1 aHVkNIxm6wB+eXnDAjLJk9yMdBSTZHwDNsj3s8OC7U1dpRuIAMu30V7M+OFxdtR0W/KD 2psV0BXtxlAnGogQcnr39GckWpM4T+43H6/pxRWMomxPQvnATKobAiQ6xDU5Xo/5gKd9 V02tf6wv0a+FCpQrdHnFvEbSYlAgLjP79LITt0Ti/PnCi3Z6GDTluR+NeyPmjLkfsg8m 0mCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=CeVWo1oyLHlrkCpHXScojQj5RFMRVg5d2AH7RmCjzYY=; b=fuMN1rIzx3i/IokZIMX2QJbhaPR4plwbNdIj7MmrMXw/I7fOFOTkBZKr+DSb4PQQAz DvNleJp2p0813waLJgC0TUJJRe9l8j3MuFwYThz7eS+6fvHogpLt/vRM0b6Kqvc82+vm fr7/lmJLPHgX5P4jHypX2RKHmA8H+h7T5CY93rotPNUOzGV+HBsRb5zbEHMWLtYzTrB8 pL6SxvnillBFNKRe28gfI3fevbeuP5nH08q5uWB4yZ+jwiad/YQ0cMDHQopHiJdJSsyg 8Yh05vo+kaO23zk7xxGXrY4t4bZpIfBYl2sPzNpsRPj5TyC38rUe8IP9Zb4puS6kL833 wAHA== X-Gm-Message-State: AOAM532/SkKbZNy9+ONhXF+IsMHboEQQrYciv+pDc9xc0doXMmlun2Sr 4vTGqp56u0KOLHBE/j/RJP6ksr02G+ViWw== X-Google-Smtp-Source: ABdhPJyx7eRR84roXeHXB/poVN9H7RG2Or6KWaoUfwJ07+WiioQObyJUZeRkkhiWZLwg3UVxTj+Eiw== X-Received: by 2002:a17:902:7291:: with SMTP id d17mr2928083pll.141.1597431805813; Fri, 14 Aug 2020 12:03:25 -0700 (PDT) Received: from [192.168.1.11] ([71.212.141.89]) by smtp.gmail.com with ESMTPSA id s67sm10752350pfs.117.2020.08.14.12.03.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 14 Aug 2020 12:03:24 -0700 (PDT) Subject: Re: [PATCH 3/7] target/arm/cpu: spe: Add an option to turn on/off vSPE support To: Andrew Jones , Haibo Xu References: <20200810105056.v33r35x6rex2ywdj@kamzik.brq.redhat.com> From: Richard Henderson Message-ID: <2259b091-369e-1090-1bd4-e09cf425ac56@linaro.org> Date: Fri, 14 Aug 2020 12:03:22 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200810105056.v33r35x6rex2ywdj@kamzik.brq.redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::641; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x641.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org, philmd@redhat.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 8/10/20 3:50 AM, Andrew Jones wrote: >> @@ -1959,6 +1961,7 @@ enum arm_features { >> ARM_FEATURE_VBAR, /* has cp15 VBAR */ >> ARM_FEATURE_M_SECURITY, /* M profile Security Extension */ >> ARM_FEATURE_M_MAIN, /* M profile Main Extension */ >> + ARM_FEATURE_SPE, /* has SPE support */ > > We shouldn't need to add this feature bit. SPE should have an ID register > bit to use instead. Yes indeed: ID_AA64DFR0_EL1.PMSVer. r~