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=-9.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,WEIRD_QUOTING 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 9BA3BC2D0A3 for ; Wed, 4 Nov 2020 16:56:06 +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 E12AD206FA for ; Wed, 4 Nov 2020 16:56:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="osQFm1jS" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E12AD206FA 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]:60504 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kaM4q-00078f-U7 for qemu-devel@archiver.kernel.org; Wed, 04 Nov 2020 11:56:04 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:54116) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kaM3m-0005xu-BR for qemu-devel@nongnu.org; Wed, 04 Nov 2020 11:54:58 -0500 Received: from mail-wm1-x344.google.com ([2a00:1450:4864:20::344]:34357) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kaM3k-0003uk-FE for qemu-devel@nongnu.org; Wed, 04 Nov 2020 11:54:58 -0500 Received: by mail-wm1-x344.google.com with SMTP id 23so2266751wmg.1 for ; Wed, 04 Nov 2020 08:54:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=references:user-agent:from:to:cc:subject:in-reply-to:date :message-id:mime-version:content-transfer-encoding; bh=4jjWpn4bcwLC7eZjYcSUVSK/OwVcFjwCXKimzrpEA18=; b=osQFm1jSPAgDnLwh/kW/r8CpAJdDTvPMUvweMlat8bmDz4AS0gR7n/zO/DCXS6h49x Ai4J45OlWEz5KClmmiorY7ixpxixy6fhNrsSkyE2PLmWdhhBWuoq/Z/DY8QVjK9rtAdr c9ysG/C4xXLwJCSHitsgKEWcjn2zDPF2XT6o4LamikLZ8+MuOS0nWbW/c+EH4gkMAYEe ayHAaGS9LK9qPDt77/g+Txh464ZW/L25r0lZ9KHNr2KrYOiYgYJuQ7KOMHTNj6AVjhdy EUifoyo2hvBIef8RX3+1AUWw3QyqkBHGv9ecKv4yF5u4mVzhu2rpxXYDuRAh9nySb4dq yX7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:references:user-agent:from:to:cc:subject :in-reply-to:date:message-id:mime-version:content-transfer-encoding; bh=4jjWpn4bcwLC7eZjYcSUVSK/OwVcFjwCXKimzrpEA18=; b=igxPZe4gxFc2N2DeGmiIkZ5tG/oON2MM2LYT/aII1/tid2t2pYWPdsrCIeMWeFPWe6 l+feWwz9ysjtKQiQK8HNEw9WEPe550ORfpcJ/ODGyIwwCuaOieB/XwNjM3Tz1KrJh5/0 qwhO55eNXG/TjGbzB00uJ5XIpL+UkGTSFwxgrC9btj7NMcS/ap5KhS6Iw2ufTdwYLulX tqQfn8ic7n+TZgxY8s1D0sc03JAdaTOoph+h4KMq5TBiMH6r2O094SqLGLMuwHCVC3lW GKho8eVjYnuJn76rGYxFu/Mfg+JNlfxPusxgDSwtPtzxj51dAqmBOEXsWqIc4pj7k3wZ QV5A== X-Gm-Message-State: AOAM530WHx3LJDZZG7hkUVrbEsSw9oicroFmnNJ5DXEfCAyYEeT7/LHA 5LyIeGu1tfnTwS+a9GBse5EK5Q== X-Google-Smtp-Source: ABdhPJynb/uN3jJeod19WJJBzTzFlb9xcseIOuZihTTv0r+4OmJ6ZlLxTCQVXDpCjP/V6uNM9C6QPg== X-Received: by 2002:a1c:6a11:: with SMTP id f17mr5442154wmc.24.1604508895023; Wed, 04 Nov 2020 08:54:55 -0800 (PST) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id z2sm3009676wmf.45.2020.11.04.08.54.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Nov 2020 08:54:53 -0800 (PST) Received: from zen (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 4F0551FF7E; Wed, 4 Nov 2020 16:54:53 +0000 (GMT) References: <20201103104710.27150-1-alex.bennee@linaro.org> <20201103112339.GP1664@vanye> User-agent: mu4e 1.5.6; emacs 28.0.50 From: Alex =?utf-8?Q?Benn=C3=A9e?= To: Leif Lindholm Subject: Re: [RFC PATCH] docs: add some notes on the sbsa-ref machine In-reply-to: <20201103112339.GP1664@vanye> Date: Wed, 04 Nov 2020 16:54:53 +0000 Message-ID: <87sg9pawpu.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::344; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x344.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, WEIRD_QUOTING=0.001 autolearn=ham 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: Graeme Gregory , Hongbo Zhang , Peter Maydell , Shashi Mallela , qemu-devel@nongnu.org, "open list:ARM TCG CPUs" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Leif Lindholm writes: > On Tue, Nov 03, 2020 at 10:47:10 +0000, Alex Benn=C3=A9e wrote: >> We should at least document what this machine is about. > > Thanks! > (comments below) > >> Cc: Graeme Gregory >> Cc: Leif Lindholm >> Cc: Hongbo Zhang >> Cc: Shashi Mallela >> Signed-off-by: Alex Benn=C3=A9e >> --- >> docs/system/arm/sbsa.rst | 30 ++++++++++++++++++++++++++++++ >> docs/system/target-arm.rst | 1 + >> 2 files changed, 31 insertions(+) >> create mode 100644 docs/system/arm/sbsa.rst >>=20 >> diff --git a/docs/system/arm/sbsa.rst b/docs/system/arm/sbsa.rst >> new file mode 100644 >> index 0000000000..a47c9360de >> --- /dev/null >> +++ b/docs/system/arm/sbsa.rst >> @@ -0,0 +1,30 @@ >> +Arm Server Base System Architecture Reference board (``sbsa-ref``) >> +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> + >> +While the `virt` board is a generic board platform that doesn't match >> +any real hardware the `sbsa-ref` board intends to look like real >> +hardware. The `Server Base System Architecture >> +` defines a >> +minimum base line of hardware support and importantly how the firmware >> +reports that to any operating system. It is a static system that >> +reports a very minimal DT to the firmware for command line input to >> +the firmware. > > I think you mean the right thing, but ... > "a very minimal DT to the firmware for non-discoverable information > about components affected by the qemu command line" > (i.e. cpus and memory) > >> As a result it must have a firmware specifically built >> +to expect a certain hardware layout (as you would in a real machine). >> + >> +It is intended to be a machine for developing firmware and testing >> +standards compliance with operating systems. >> + >> +Supported devices >> +""""""""""""""""" >> + >> +The sbsa-ref board supports: >> + >> + - A configurable number of Cortex-A57 cpus >> + - GIC version 3 > > The intent was always for sbsa-ref to be tracking SBSA development, so > I wonder whether we should be documenting specific versions of cpu and > gic (and then keep remembering to update the docs). > My short-term plan was to swap the a57 for "max", but > documentation-wise, could we just say "number of aarch64 cpus"? > Could we refer to the gic as "latest supported emulated"? I'm not sure we want a movable feast... shouldn't we at least provide compatibility for older variations? -cpu max is useful but you can get new features coming out of the blue. --=20 Alex Benn=C3=A9e