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 16C22CAC5BC for ; Fri, 26 Sep 2025 11:42:27 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v26oz-0006Yv-HL; Fri, 26 Sep 2025 07:41:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1v26ox-0006YJ-1S for qemu-devel@nongnu.org; Fri, 26 Sep 2025 07:41:03 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1v26ok-0007xy-Og for qemu-devel@nongnu.org; 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Fri, 26 Sep 2025 11:40:40 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.45.242.33]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id D55991956095; Fri, 26 Sep 2025 11:40:39 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 29D9421E6A27; Fri, 26 Sep 2025 13:40:37 +0200 (CEST) From: Markus Armbruster To: Mark Cave-Ayland Cc: imammedo@redhat.com, philmd@linaro.org, berrange@redhat.com, jdenemar@redhat.com, armbru@redhat.com, pbonzini@redhat.com, richard.henderson@linaro.org, eduardo@habkost.net, mst@redhat.com, marcel.apfelbaum@gmail.com, qemu-devel@nongnu.org Subject: Re: [PATCH v2 2/2] docs/about/deprecated.rst: document new restrictions for isapc CPU models In-Reply-To: <20250925160453.2025885-3-mark.caveayland@nutanix.com> (Mark Cave-Ayland's message of "Thu, 25 Sep 2025 17:03:20 +0100") References: <20250925160453.2025885-1-mark.caveayland@nutanix.com> <20250925160453.2025885-3-mark.caveayland@nutanix.com> Date: Fri, 26 Sep 2025 13:40:37 +0200 Message-ID: <87seg9o30q.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.133.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Mark Cave-Ayland writes: > Add a new paragraph in the "Backwards compatibility" section documenting that > the isapc machine is now restricted to 32-bit x86 CPUs, and -cpu host and > -cpu max are no longer supported. > > Signed-off-by: Mark Cave-Ayland > --- > docs/about/deprecated.rst | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst > index aa300bbd50..4c7000650d 100644 > --- a/docs/about/deprecated.rst > +++ b/docs/about/deprecated.rst > @@ -514,6 +514,19 @@ available firmwares that are using the current (wrong) name. The > property is kept as is in 9.1, together with "riscv,delegation", to > give more time for firmware developers to change their code. > > +x86 "isapc" board restricted to 32-bit x86 CPUs (since 10.2) > +'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' > + > +The "isapc" board represents a historical x86 ISA PC and is intended for > +older 32-bit x86 CPU models, defaulting to a 486 CPU model. Previously it > +was possible (but non-sensical) to specify a more modern x86 CPU, including > +``-cpu host`` or ``-cpu max`` even if the features were incompatible with many > +of the intended guest OSs. > + > +Now the "isapc" board contains an explicit list of supported 32-bit x86 CPU > +models. If the user requests an unsupported CPU model then an error message is > +returned indicating the available CPU models. > + > Migration > --------- I couldn't see how this corresponds to PATCH 1 until I realized it documents recent commit e1e2909f8e7 modified by PATCH 1. A hint in the commit message could've saved me a few minutes :) Reviewed-by: Markus Armbruster