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 91E1FC433EF for ; Fri, 22 Jul 2022 12:04:43 +0000 (UTC) Received: from localhost ([::1]:43724 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oErOc-0002QV-F9 for qemu-devel@archiver.kernel.org; Fri, 22 Jul 2022 08:04:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49948) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oErMW-0008D9-LJ for qemu-devel@nongnu.org; Fri, 22 Jul 2022 08:02:32 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:34160) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oErMT-0006Ew-I1 for qemu-devel@nongnu.org; Fri, 22 Jul 2022 08:02:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658491348; 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; bh=MWwtli2inRFLcqVUGsbZCyqw0kGwjbsHqr/Q8Oo6uy4=; b=PgGoZmLUdntOjyKZKYeeFuOGkkTP/Xpr6+PgXXL78lJmSyrvamUrY/4T39PP0JdCe8DXf1 wechV1DaWhHkcfov6vKEgrLOqQKw7xJ2SNKp+hAdTAnYJ9xsKmxCpxjOiJDaRyFHoNnAS6 tMBPMHI1IV8AoIg+MYjew63dJoiLlYE= 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-451-wcGu2R98O8-xGxnMBe8PGQ-1; Fri, 22 Jul 2022 08:02:27 -0400 X-MC-Unique: wcGu2R98O8-xGxnMBe8PGQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0144A803520; Fri, 22 Jul 2022 12:02:27 +0000 (UTC) Received: from localhost.localdomain.com (unknown [10.33.36.91]) by smtp.corp.redhat.com (Postfix) with ESMTP id 772391121314; Fri, 22 Jul 2022 12:02:25 +0000 (UTC) From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Cc: qemu-s390x@nongnu.org, Richard Henderson , Peter Maydell , Thomas Huth , David Hildenbrand , qemu-arm@nongnu.org, Cornelia Huck , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Subject: [PATCH v2 0/3] target: RFC: display deprecation flag for '-cpu help' Date: Fri, 22 Jul 2022 13:02:21 +0100 Message-Id: <20220722120224.2311982-1-berrange@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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" When querying '-cpu help' there is no presentation of fact that a CPU may be deprecated. The user just has to try it and see if they get a depecation message at runtime. The QMP command for querying CPUs report a deprecation bool flagreason. The Icelake-Client CPU (removed in 6df39f5e583ca0f67bd934d1327f9ead2e3bd49c) handled this by modifying the '.notes' section to add the word 'deprecated': { .version = 2, .note = "no TSX, deprecated", .alias = "Icelake-Client-noTSX", .props = (PropValue[]) { { "hle", "off" }, { "rtm", "off" }, { /* end of list */ } }, }, This relies on the person deprecating the CPU to remember to do this, and is redundant when this info is already expressed in the '.deprecation_note' field. This short series suggests just modifying the '-cpu help' formatter so that it displays '(deprecated)' next to any CPUs eg $ qemu-system-x86_64 -cpu help: Available CPUs: x86 486 (alias configured by machine type) (deprecated) This series touched x86_64, s390x, and aarch64 because that's all I personally needed from a downstream POV, but any & all of the targets would benefit from this. They have each implemented the '-cpu help' logic independantly though, and unifying that code is not entirely straightforward. Changed in v2: - Just include "deprecated" as a flag, not full description which made the output too verbose and long lines. Daniel P. Berrangé (3): target/i386: display deprecation status in '-cpu help' target/s390x: display deprecation status in '-cpu help' target/arm: display deprecation status in '-cpu help' target/arm/helper.c | 7 ++++++- target/i386/cpu.c | 5 +++++ target/s390x/cpu_models.c | 23 ++++++++++++++++++----- 3 files changed, 29 insertions(+), 6 deletions(-) -- 2.36.1