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 8B3E9C47DD9 for ; Wed, 27 Mar 2024 15:58:00 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rpVed-00009Q-Iz; Wed, 27 Mar 2024 11:57:31 -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 1rpVeb-000092-98 for qemu-devel@nongnu.org; Wed, 27 Mar 2024 11:57:29 -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 1rpVeZ-0005nL-Fh for qemu-devel@nongnu.org; Wed, 27 Mar 2024 11:57:29 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1711555046; h=from:from:reply-to: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=Wxn/Th4zS+sAL4BOzaaaOi0Xrfx5Q05yg265tT1DKNo=; b=i9/pTOB3sDLvpnuJK2+J+Q/Xia5uUKDAtAZTI8hK5X0/3EiZW4exvokMqr02LhxYSEIBAx 8lkgDjaJBHWlqlw5VekutT1hiXgQ/HfI670FGEn/Tz8M7Izy6llHhH5h9o+Tfhf71Z2fr1 ZgQ2PRquWAe25ckRi2ORgFIcIcw6dvk= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-208-Tyfb2S5gMkmuzApKriZIFg-1; Wed, 27 Mar 2024 11:57:19 -0400 X-MC-Unique: Tyfb2S5gMkmuzApKriZIFg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1FA763801FE6; Wed, 27 Mar 2024 15:57:19 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.186]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 332692166B31; Wed, 27 Mar 2024 15:57:17 +0000 (UTC) Date: Wed, 27 Mar 2024 15:57:11 +0000 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= Cc: qemu-devel@nongnu.org, Mark Cave-Ayland , devel@lists.libvirt.org, Thomas Huth , Paolo Bonzini , Richard Henderson , Igor Mammedov , Gerd Hoffmann , Marcel Apfelbaum , mst@redhat.com, Eduardo Habkost Subject: Re: [PATCH-for-9.0] hw/i386/pc: Deprecate 64-bit CPUs on ISA-only PC machine Message-ID: References: <20240327153517.31285-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20240327153517.31285-1-philmd@linaro.org> User-Agent: Mutt/2.2.12 (2023-09-09) X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.6 Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Wed, Mar 27, 2024 at 04:35:17PM +0100, Philippe Mathieu-Daudé wrote: > Per Daniel suggestion [*]: > > > isapc could arguably be restricted to just 32-bit CPU models, > > because we should not need it to support any feature that didn't > > exist prior to circa 1995. eg refuse to start with isapc, if 'lm' > > is present in the CPU model for example. > > [*] https://lore.kernel.org/qemu-devel/ZgQkS4RPmSt5Xa08@redhat.com/ > > Suggested-by: Daniel P. Berrangé > Signed-off-by: Philippe Mathieu-Daudé > --- > docs/about/deprecated.rst | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst > index 7b548519b5..345c35507f 100644 > --- a/docs/about/deprecated.rst > +++ b/docs/about/deprecated.rst > @@ -208,6 +208,13 @@ is no longer packaged in any distro making it harder to run the > ``check-tcg`` tests. Unless we can improve the testing situation there > is a chance the code will bitrot without anyone noticing. > > +64-bit (x86_64) CPUs on the ``isapc`` machine (since 9.0) > +''''''''''''''''''''''''''''''''''''''''''''''''''''''''' > + > +The ``isapc`` machine aims to emulate old PC machine without PCI was > +generalized, so hardware available around 1995, before 64-bit intel > +CPUs were produced. > + > System emulator machines > ------------------------ I would expect there to be a 'warn_report()' added to the isapc init code somewhere to go along with this, that will later be turned into an 'error_report' once the deprecation period is over. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|