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 BC495FED2F3 for ; Thu, 12 Mar 2026 09:21:28 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w0cEB-0008Vl-79; Thu, 12 Mar 2026 05:21:11 -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 1w0cE7-0008RD-Vj for qemu-arm@nongnu.org; Thu, 12 Mar 2026 05:21:08 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w0cE6-0002qL-I7 for qemu-arm@nongnu.org; Thu, 12 Mar 2026 05:21:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1773307265; 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: in-reply-to:in-reply-to:references:references; bh=zESzfcBl25WWrCWr9Oi6ybD+oE2mIobPfzu8j5WOx1M=; b=Nu0rymVoSuiR/1kvJEDL1//g9rPh9tPz1GnhZOguMiCm6Am1mqwBjCL1JfrEiHeKl0N8WX mru43OfkhAK/l5Q4beRlTI8lRO+fX3Pj7B+3G05xacsCWX+i7yvvt6rhBGohjJpQ0PwVSP mM1YUHtVxIerBaIRP9G3KKaQKjewxOM= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-211-75MCgWCjMS--IRpfj92CyA-1; Thu, 12 Mar 2026 05:21:02 -0400 X-MC-Unique: 75MCgWCjMS--IRpfj92CyA-1 X-Mimecast-MFC-AGG-ID: 75MCgWCjMS--IRpfj92CyA_1773307260 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (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 mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 20F9C195608D; Thu, 12 Mar 2026 09:21:00 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.45.242.12]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 1DE8B19560B7; Thu, 12 Mar 2026 09:20:59 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id AFDAB21E681E; Thu, 12 Mar 2026 10:20:56 +0100 (CET) From: Markus Armbruster To: Eric Auger Cc: Nathan Chen , qemu-devel@nongnu.org, qemu-arm@nongnu.org, Yi Liu , Zhenzhong Duan , Peter Maydell , Shannon Zhao , "Michael S . Tsirkin" , Igor Mammedov , Ani Sinha , Paolo Bonzini , Daniel =?utf-8?Q?P=2EBerrang=C3=A9?= , Alex Williamson , =?utf-8?Q?C=C3=A9dric?= Le Goater , Eric Blake Subject: Re: [RFC PATCH 2/8] hw/arm/smmuv3-accel: Introduce _AUTO support for ATS In-Reply-To: (Eric Auger's message of "Thu, 12 Mar 2026 09:51:45 +0100") References: <20260309192119.870186-1-nathanc@nvidia.com> <20260309192119.870186-3-nathanc@nvidia.com> <87pl5cnp06.fsf@pond.sub.org> <98e7dd71-6669-4a82-bec8-f1dae2d861c3@redhat.com> <0bdcf7d7-136e-42f4-9fa9-d31f6ae6e19f@nvidia.com> <87o6ktxwzn.fsf@pond.sub.org> Date: Thu, 12 Mar 2026 10:20:56 +0100 Message-ID: <87y0jxwghz.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Mimecast-MFC-PROC-ID: jSjGp1GpYERncJn4omGGlqZWFfSydgQqGEFQZKGVKN4_1773307260 X-Mimecast-Originator: redhat.com Content-Type: text/plain Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 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, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.819, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.903, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@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-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Eric Auger writes: > On 3/12/26 9:39 AM, Markus Armbruster wrote: [...] >> We promise to follow a certain process when changing external >> interfaces: docs/about/deprecated.rst. >> >> This is why I inquired about external access. No external access, no >> compatibility worries. >> >> I specifically asked about JSON, because going from bool to OnOffAuto is >> mostly compatible in key=value syntax: values "on" and "off" keep >> working. >> >> Mostly compatible, because qapi_bool_parse() also recognizes "yes", >> "true", "y", "no", "false", and "n" for convenience, and these stop >> working. We have a knack for inventing convenience features that later >> bite us. >> >> JSON breaks entirely, of course: all values stop working. >> >> Even with external access, compatibility worries start only after we >> shipped the interface in a release. Did we? > those options were introduced in qemu 11.0. Fixing them in -rc is still > an option but it is a very tight schedule If it turns out to be too tight, rever them or declare them experimental? Then you can revise them without process hassle in the next release. [...]