From patchwork Thu Mar 2 16:31:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 13157560 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 64105C7EE2F for ; Thu, 2 Mar 2023 16:31:30 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.505235.777892 (Exim 4.92) (envelope-from ) id 1pXlpy-0001jL-IO; Thu, 02 Mar 2023 16:31:22 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 505235.777892; Thu, 02 Mar 2023 16:31:22 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pXlpy-0001jC-FW; Thu, 02 Mar 2023 16:31:22 +0000 Received: by outflank-mailman (input) for mailman id 505235; Thu, 02 Mar 2023 16:31:21 +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 1pXlpx-0001IZ-Io for xen-devel@lists.xenproject.org; Thu, 02 Mar 2023 16:31:21 +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 a883bb25-b917-11ed-a550-8520e6686977; Thu, 02 Mar 2023 17:31:19 +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-112-FcfOwdQLOLq8Nr9yu7kRsA-1; Thu, 02 Mar 2023 11:31:16 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E59C9802C18; Thu, 2 Mar 2023 16:31:15 +0000 (UTC) Received: from thuth.com (unknown [10.39.192.93]) by smtp.corp.redhat.com (Postfix) with ESMTP id 697CD400EA93; Thu, 2 Mar 2023 16:31:13 +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: a883bb25-b917-11ed-a550-8520e6686977 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1677774677; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3psyEgJRau2Jh1sB5FoWnPWnwz10rj9WAfK8OXPQ0lI=; b=CGCoKkp/O/cIAT7rmrqKicDsVp6z2YSno9vOa5tkDcJ5WQvAb0uJ3Dbvl7O4Vv79opm8/V MACyFz2f+i11xKkqHt4gfEHiWj3nldiXRN41dVA1o9FhYOikGC/R1sV8Y+ZeGpoMUGQS3W PS41vhSrK17s2xCeloy3CGA+7lqDKrU= X-MC-Unique: FcfOwdQLOLq8Nr9yu7kRsA-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 Subject: [PATCH v2 2/6] docs/about/deprecated: Deprecate 32-bit x86 hosts Date: Thu, 2 Mar 2023 17:31:02 +0100 Message-Id: <20230302163106.465559-3-thuth@redhat.com> In-Reply-To: <20230302163106.465559-1-thuth@redhat.com> References: <20230302163106.465559-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 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. Signed-off-by: Thomas Huth Reviewed-by: Daniel P. Berrangé Reviewed-by: Wilfred Mallawa --- docs/about/deprecated.rst | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index 11700adac9..a30aa8dfdf 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -208,6 +208,18 @@ 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 ----------------------