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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B5958C433F5 for ; Mon, 11 Apr 2022 15:29:44 +0000 (UTC) Received: from localhost ([::1]:42354 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ndvz5-0006qY-8i for qemu-devel@archiver.kernel.org; Mon, 11 Apr 2022 11:29:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48518) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ndvrs-0005CD-Jh for qemu-devel@nongnu.org; Mon, 11 Apr 2022 11:22:17 -0400 Received: from mail-wr1-x430.google.com ([2a00:1450:4864:20::430]:38515) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ndvrq-0004z0-4t for qemu-devel@nongnu.org; Mon, 11 Apr 2022 11:22:15 -0400 Received: by mail-wr1-x430.google.com with SMTP id s28so7628101wrb.5 for ; Mon, 11 Apr 2022 08:22:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=references:user-agent:from:to:cc:subject:date:in-reply-to :message-id:mime-version:content-transfer-encoding; bh=zdbnT7Rq8oTQDkQClsnTdHRrbDo72Eqi93aCSp6bjUg=; b=p0YpsCDFFxRir8x/JljNHiGo+twJiCrnRchMeZugO/qJBX+pdAm0GFKfZkrifkVo07 /nTUoPymG/HHilWz1CAd5A5eSgg8oikZP3P5DdC/cSd3gaOEEKACX/tKoZbunroCCJwu INnqAeJbjOo67rSGi9D8otSiULB1EVk9z7xxfvUooDgJc6cEi+Gx2uuo3MaCP9zd3fc6 Sd7ZxsGTs7ONMdQS8H1pDnJ/o/5siSf9BiYGAfqApvXFEKW7uFpjRZdvCmBNnG1sWQOk aAKH+0bLFyoCgaGJb62cbeB/tNH310q7SIFZ1v+BkOxu3JSBbfPfRBDXx43fQhnDZ6us bZIA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:references:user-agent:from:to:cc:subject:date :in-reply-to:message-id:mime-version:content-transfer-encoding; bh=zdbnT7Rq8oTQDkQClsnTdHRrbDo72Eqi93aCSp6bjUg=; b=Z/gGykp8ObDf7sSr90/NSDoKYinf78iUMbfZBhzkJb9YInQX98mIlLR/lf0RT8dvvk pZ5swsZfFHcz0i1pOO3/Bt8dr3Em05CBSNY0gz3khM7hU6uQvn8s7w3yyuj6+4ttmVO7 W4GKrmM1dYgsSDhQljnbOf4i77npJo2zjFKhYjUmgYE9RimSlhi4KXMKMdt/8yLCb+fk wmZdEww/IT2M4qqtigdlamVC0uRaoE5DiLcJtiPruLcmn4KsVel6ONQNQO9nndwB/5A2 8NylZ1DWwQn0mGWhdCPnS/lFatPrBNcL8vHVj/LgAjp+ezMIeiaqlB0A9MW59Bs06fDt TRAQ== X-Gm-Message-State: AOAM532yOZqueHZHpRLk1ydDEPcu7ZK6fL6hT7CeiDb3VGmcuwbFsRQA KJv1KBOXU6Eg8YuUbwzCZAYqbw== X-Google-Smtp-Source: ABdhPJxgq/QsfGtjIlevpQ6mCQtkx2X4QRMy/5pf6J6GLtpKxFazCs6fcmIZQIqY4pPfd7W3gaeQ6A== X-Received: by 2002:a05:6000:170a:b0:205:8a7f:c0c6 with SMTP id n10-20020a056000170a00b002058a7fc0c6mr25875839wrc.702.1649690532187; Mon, 11 Apr 2022 08:22:12 -0700 (PDT) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id o29-20020a05600c511d00b0038e3532b23csm18279701wms.15.2022.04.11.08.22.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Apr 2022 08:22:11 -0700 (PDT) Received: from zen (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 8F3E51FFB7; Mon, 11 Apr 2022 16:22:10 +0100 (BST) References: User-agent: mu4e 1.7.12; emacs 28.1.50 From: Alex =?utf-8?Q?Benn=C3=A9e?= To: Itaru Kitayama Subject: Re: Procedures adding new CPUs in sbsa-ref Date: Mon, 11 Apr 2022 16:16:54 +0100 In-reply-to: Message-ID: <87a6cr1w7x.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::430; envelope-from=alex.bennee@linaro.org; helo=mail-wr1-x430.google.com 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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Leif Lindholm , qemu-devel@nongnu.org, Radoslaw Biernacki Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Itaru Kitayama writes: > Good point; however per the SBSA specification, DEN0029F, there's the > PE architecture requirement at > each level from 1 to 7, so now I am wondering whether supporting > cortex-a57 and a72 are good enough to > set up a fully SBSA level 7 compliant "board" in QMEU. Not currently - we are working on cortex-a76/neoverse-n1 which will provide a v8.2 baseline for sbsa-ref. See: Subject: [PATCH 00/16] target/arm: Implement features Debugv8p4, RAS, IESB Date: Fri, 8 Apr 2022 17:07:26 -0700 Message-Id: <20220409000742.293691-1-richard.henderson@linaro.org> and: Subject: [PATCH 0/7] target/arm: More trivial features, A76, N1 Date: Sat, 9 Apr 2022 22:57:18 -0700 Message-Id: <20220410055725.380246-1-richard.henderson@linaro.org> which are stepping stones to those concrete models. Please review if you can.=20 > Also, the 'max' > is there, but does not boot. Generally the firmware has to be built with the knowledge of what system it is running on so will generally fall over if run on a different CPU feature set. However I believe Leif had a firmware branch which attempts to work with -cpu max by doing proper ID register probing before using features. However -cpu max is very a moving feast which is why there is a push for the concrete CPU types. I believe there is a proposal for a versioned sbsa-ref model which will step of the default CPU for higher levels. > > Itaru. > > On Sat, Apr 9, 2022 at 12:04 AM Peter Maydell = wrote: >> >> On Fri, 8 Apr 2022 at 15:59, Itaru Kitayama w= rote: >> > I'd like to add a64fx cpu to the sbsa-ref board, if there's a quick an= d dirty >> > way of completing that, advice from the maintainers is greatly apprec= iated. >> >> I have cc'd the sbsa-ref maintainers (as listed in the MAINTAINERS file). >> >> However, I'm not sure why you want to add the a64fx CPU to this >> board model? The sbsa-ref board is intended as a platform for >> developing firmware that runs on Server Base System Architecture >> hardware, so it deliberately doesn't have support for every CPU >> type QEMU implements. >> >> thanks >> -- PMM --=20 Alex Benn=C3=A9e