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 5A8EEC54ED1 for ; Tue, 27 May 2025 11:34:15 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uJsYD-000105-3r; Tue, 27 May 2025 07:33:06 -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 1uJsXv-0000y7-Dj for qemu-devel@nongnu.org; Tue, 27 May 2025 07:32:40 -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 1uJsXk-0001Tu-Nj for qemu-devel@nongnu.org; Tue, 27 May 2025 07:32:32 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1748345545; 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=MQiCNQFJOinvn66rLR/m9nW9VwVq2V6O256INkb9Fio=; b=MrGDa9+nCrVcBD22MoOBi3NFCl4CroCxz7GA77UMjsKjoXS6NyZbVKx6CrVE4obKmqnR73 WzY1Z7oBWFbw/I5c9DPcblxQ9+qru8L8ivUFQIOR56rYhQkXPRmVctt1JvOgb0JZ7V76oJ 9p1Zsl8qIQ2bupWUfXSR5F0wrwCy19M= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-616-8QKmGH9FORWlIuesE8RYeQ-1; Tue, 27 May 2025 07:32:21 -0400 X-MC-Unique: 8QKmGH9FORWlIuesE8RYeQ-1 X-Mimecast-MFC-AGG-ID: 8QKmGH9FORWlIuesE8RYeQ_1748345540 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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id DD06D180036E; Tue, 27 May 2025 11:32:19 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.45.242.2]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 92E6419560AB; Tue, 27 May 2025 11:32:19 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id E279421E6757; Tue, 27 May 2025 13:32:16 +0200 (CEST) From: Markus Armbruster To: Pierrick Bouvier Cc: qemu-devel@nongnu.org, michael.roth@amd.com, thuth@redhat.com, pbonzini@redhat.com, richard.henderson@linaro.org, peter.maydell@linaro.org, berrange@redhat.com, philmd@linaro.org Subject: Re: [PATCH v4 08/15] qapi: Make CpuModelExpansionInfo::deprecated-props optional and generic In-Reply-To: <20250522190542.588267-9-pierrick.bouvier@linaro.org> (Pierrick Bouvier's message of "Thu, 22 May 2025 12:05:35 -0700") References: <20250522190542.588267-1-pierrick.bouvier@linaro.org> <20250522190542.588267-9-pierrick.bouvier@linaro.org> Date: Tue, 27 May 2025 13:32:16 +0200 Message-ID: <87bjreqofz.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 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: -49 X-Spam_score: -5.0 X-Spam_bar: ----- X-Spam_report: (-5.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-2.907, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Pierrick Bouvier writes: > From: Philippe Mathieu-Daud=C3=A9 > > We'd like to have some unified QAPI schema. Having a structure field > conditional to a target being built in is not very practical. > > While @deprecated-props is only used by s390x target, it is generic > enough and could be used by other targets (assuming we expand > CpuModelExpansionType enum values). > > Let's always include this field, regardless of the target, but make it > optional. This is not a compatibility break only because the field > remains present always on S390x. > > Reviewed-by: Richard Henderson > Signed-off-by: Philippe Mathieu-Daud=C3=A9 > Signed-off-by: Pierrick Bouvier > --- > qapi/machine-target.json | 7 +++---- > 1 file changed, 3 insertions(+), 4 deletions(-) > > diff --git a/qapi/machine-target.json b/qapi/machine-target.json > index 426ce4ee82d..d8dbda4b508 100644 > --- a/qapi/machine-target.json > +++ b/qapi/machine-target.json > @@ -244,19 +244,18 @@ > # > # @model: the expanded CpuModelInfo. > # > -# @deprecated-props: a list of properties that are flagged as > +# @deprecated-props: an optional list of properties that are flagged as > # deprecated by the CPU vendor. The list depends on the > # CpuModelExpansionType: "static" properties are a subset of the > # enabled-properties for the expanded model; "full" properties are > # a set of properties that are deprecated across all models for > -# the architecture. (since: 9.1). > +# the architecture. (since: 10.1 -- since 9.1 on s390x --). > # > # Since: 2.8 > ## > { 'struct': 'CpuModelExpansionInfo', > 'data': { 'model': 'CpuModelInfo', > - 'deprecated-props' : { 'type': ['str'], > - 'if': 'TARGET_S390X' } }, > + '*deprecated-props' : ['str'] }, > 'if': { 'any': [ 'TARGET_S390X', > 'TARGET_I386', > 'TARGET_ARM', [Copied from review of prior posts] When I see "optional array", I wonder about the difference between "absent" and "present and empty". The doc comment doesn't quite explain it. I figure "present and empty" means empty, while "absent" means we don't know / not implemented. Is the difference useful? Daniel doubts it is. [end of copy] Let's take with this patch as is. If we prefer to remove the difference, we can do so on top.