From patchwork Mon Mar 6 08:46:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 13160712 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 386F9C6FD1D for ; Mon, 6 Mar 2023 08:47:27 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.506784.779975 (Exim 4.92) (envelope-from ) id 1pZ6V7-0001jl-FG; Mon, 06 Mar 2023 08:47:21 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 506784.779975; Mon, 06 Mar 2023 08:47:21 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pZ6V7-0001jX-BB; Mon, 06 Mar 2023 08:47:21 +0000 Received: by outflank-mailman (input) for mailman id 506784; Mon, 06 Mar 2023 08:47:19 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pZ6V5-0000dk-TJ for xen-devel@lists.xenproject.org; Mon, 06 Mar 2023 08:47:19 +0000 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 80609d35-bbfb-11ed-96b4-2f268f93b82a; Mon, 06 Mar 2023 09:47:19 +0100 (CET) Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-67-cbgnrg-hNoiPEn6lO3Smbg-1; Mon, 06 Mar 2023 03:47:14 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 54444185A7A4; Mon, 6 Mar 2023 08:47:13 +0000 (UTC) Received: from thuth.com (unknown [10.39.193.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id DF4AC440DE; Mon, 6 Mar 2023 08:47:10 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 80609d35-bbfb-11ed-96b4-2f268f93b82a DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678092437; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Tu4fLVUa5CKH9yGWFtuNR/Tn/c+l+6gsZNxsu/a/pnc=; b=ByIlNLDwb6LDeAYU+vUZHPccOcfthy0mS9BpjFlsIrHH8CXMd58EPcbp7MM/QO7o8/Mild TLoa86NJ13xrie3btLLnWHZYhSmyrncL/SegN+/whM49QdsCzIXJg8009GTL9rJrfSA3V+ QbwoWyCpvIgS9HdeYh80k7Qft3gN3Zs= X-MC-Unique: cbgnrg-hNoiPEn6lO3Smbg-1 From: Thomas Huth To: qemu-devel@nongnu.org, Peter Maydell , Daniel Berrange , Paolo Bonzini Cc: Markus Armbruster , =?utf-8?q?Alex_Benn=C3=A9e?= , qemu-arm@nongnu.org, Maxim Levitsky , libvir-list@redhat.com, Richard Henderson , xen-devel@lists.xenproject.org, Reinoud Zandijk , Wilfred Mallawa , John Paul Adrian Glaubitz Subject: [PATCH v4 4/5] docs/about/deprecated: Deprecate 32-bit arm hosts for system emulation Date: Mon, 6 Mar 2023 09:46:57 +0100 Message-Id: <20230306084658.29709-5-thuth@redhat.com> In-Reply-To: <20230306084658.29709-1-thuth@redhat.com> References: <20230306084658.29709-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 For running QEMU in system emulation mode, the user needs a rather strong host system, i.e. not only an embedded low-frequency controller. All recent beefy arm host machines should support 64-bit now, it's unlikely that anybody is still seriously using QEMU on a 32-bit arm CPU, so we deprecate the 32-bit arm hosts here to finally save use some time and precious CI minutes. Reviewed-by: Daniel P. Berrangé Reviewed-by: Wilfred Mallawa Signed-off-by: Thomas Huth Reviewed-by: Philippe Mathieu-Daudé Acked-by: Richard Henderson --- docs/about/deprecated.rst | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index c4fcc6b33c..f0de517dc2 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -220,6 +220,15 @@ be an effective use of its limited resources, and thus intends to discontinue it. Since all recent x86 hardware from the past >10 years is capable of the 64-bit x86 extensions, a corresponding 64-bit OS should be used instead. +System emulation on 32-bit arm hosts (since 8.0) +'''''''''''''''''''''''''''''''''''''''''''''''' + +Since QEMU needs a strong host machine for running full system emulation, and +all recent powerful arm hosts support 64-bit, the QEMU project deprecates the +support for running any system emulation on 32-bit arm hosts in general. Use +64-bit arm hosts for system emulation instead. (Note: "user" mode emulation +continuous to be supported on 32-bit arm hosts, too) + QEMU API (QAPI) events ----------------------