From patchwork Fri Mar 3 10:14:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 13158618 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 9FC9EC7EE30 for ; Fri, 3 Mar 2023 10:15:24 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.505709.778601 (Exim 4.92) (envelope-from ) id 1pY2RS-0002I2-Eq; Fri, 03 Mar 2023 10:15:10 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 505709.778601; Fri, 03 Mar 2023 10:15:10 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pY2RS-0002Hv-Az; Fri, 03 Mar 2023 10:15:10 +0000 Received: by outflank-mailman (input) for mailman id 505709; Fri, 03 Mar 2023 10:15:08 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pY2RQ-00022o-90 for xen-devel@lists.xenproject.org; Fri, 03 Mar 2023 10:15:08 +0000 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 445af429-b9ac-11ed-a550-8520e6686977; Fri, 03 Mar 2023 11:15:06 +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-224-mpFHp4drOdGIlxtLMzSiMw-1; Fri, 03 Mar 2023 05:15:00 -0500 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AEE061871D9C; Fri, 3 Mar 2023 10:14:59 +0000 (UTC) Received: from thuth.com (unknown [10.39.192.255]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3771B492C14; Fri, 3 Mar 2023 10:14:57 +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: 445af429-b9ac-11ed-a550-8520e6686977 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1677838504; 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=DHZuso5/0DhJfAOxX6dvaVSE+Y2aY/gn2NzRTirrpYs=; b=aUPZ+iFpxZkoFjH3/2yT+raBlIRVoAcq8WsHxYuC1h7klhcKPDezW5Sw2HiZoZ5jc2EBQq keU0y91RKIZQB/LUm7F5yIbTGi+wBVW3h+Y+t9jjMOpsdtOjaQkzmdUxn5XYBl8I3Gjt4T ZoUSdBgytq2U6Dae/2iocnAuDi2jT2g= X-MC-Unique: mpFHp4drOdGIlxtLMzSiMw-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 Subject: [PATCH v3 1/6] docs/about/deprecated: Deprecate 32-bit x86 hosts Date: Fri, 3 Mar 2023 11:14:47 +0100 Message-Id: <20230303101452.769367-2-thuth@redhat.com> In-Reply-To: <20230303101452.769367-1-thuth@redhat.com> References: <20230303101452.769367-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Hardly anybody still uses 32-bit x86 hosts today, so we should start deprecating them to stop wasting our time and CI minutes here. For example, there are also still some unresolved problems with these: When emulating 64-bit binaries in user mode, TCG does not honor atomicity for 64-bit accesses, which is "perhaps worse than not working at all" (quoting Richard). Let's simply make it clear that people should use 64-bit x86 hosts nowadays and we do not intend to fix/maintain the old 32-bit stuff. Reviewed-by: Daniel P. Berrangé Reviewed-by: Wilfred Mallawa Signed-off-by: Thomas Huth --- docs/about/deprecated.rst | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index 15084f7bea..f0c1e6b545 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -196,6 +196,18 @@ CI coverage support may bitrot away before the deprecation process completes. The little endian variants of MIPS (both 32 and 64 bit) are still a supported host architecture. +32-bit x86 hosts (since 8.0) +'''''''''''''''''''''''''''' + +Support for 32-bit x86 host deployments is increasingly uncommon in +mainstream OS distributions given the widespread availability of 64-bit +x86 hardware. The QEMU project no longer considers 32-bit x86 support +to 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. + + QEMU API (QAPI) events ----------------------