From patchwork Wed Nov 29 04:20:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 13472186 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 22850C4167B for ; Wed, 29 Nov 2023 04:21:41 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r8C4f-0001pZ-Cb; Tue, 28 Nov 2023 23:21:23 -0500 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 1r8C4d-0001mA-GM for qemu-devel@nongnu.org; Tue, 28 Nov 2023 23:21:19 -0500 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 1r8C4Z-0007Ls-H9 for qemu-devel@nongnu.org; Tue, 28 Nov 2023 23:21:19 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1701231667; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rr2m9uLY9gv8gvMR4JCOjuGK7rtk1pBD/3lJjahEE0A=; b=eukkE18f31G18MmoxvTs70H6T6yiVaPSUEUrIV4Wqp00H8xUZOLSY6Kq67u1I1JxvvwdX8 62kXM+KkIoiHPk9DO+34c0m3Fe7ecw3nV80iQKyQVwxMti9eTChdwl8zF65809qmRNxbAV f7oihIbMchMBy6sjK6sLuLdXm21hrFA= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-633-ogIs5iOOPOCjXSBTxEl1Ag-1; Tue, 28 Nov 2023 23:21:02 -0500 X-MC-Unique: ogIs5iOOPOCjXSBTxEl1Ag-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (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 5165180C347; Wed, 29 Nov 2023 04:21:01 +0000 (UTC) Received: from gshan.redhat.com (unknown [10.64.136.61]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 14B5D492BE0; Wed, 29 Nov 2023 04:20:52 +0000 (UTC) From: Gavin Shan To: qemu-arm@nongnu.org Cc: qemu-devel@nongnu.org, qemu-riscv@nongnu.org, peter.maydell@linaro.org, imammedo@redhat.com, b.galvani@gmail.com, strahinja.p.jankovic@gmail.com, sundeep.lkml@gmail.com, kfting@nuvoton.com, wuhaotsh@google.com, nieklinnenbank@gmail.com, rad@semihalf.com, quic_llindhol@quicinc.com, marcin.juszkiewicz@linaro.org, eduardo@habkost.net, marcel.apfelbaum@gmail.com, philmd@linaro.org, wangyanan55@huawei.com, vijai@behindbytes.com, palmer@dabbelt.com, alistair.francis@wdc.com, bin.meng@windriver.com, liwei1518@gmail.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, shan.gavin@gmail.com Subject: [PATCH v8 3/9] machine: Improve is_cpu_type_supported() Date: Wed, 29 Nov 2023 14:20:06 +1000 Message-ID: <20231129042012.277831-4-gshan@redhat.com> In-Reply-To: <20231129042012.277831-1-gshan@redhat.com> References: <20231129042012.277831-1-gshan@redhat.com> MIME-Version: 1.0 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 Received-SPF: pass client-ip=170.10.129.124; envelope-from=gshan@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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable 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 It's no sense to check the CPU type when mc->valid_cpu_types[0] is NULL. So the check is skipped for this particular case. The constraint has been taken when the error messags are appended. A precise hint for the error message is given when mc->valid_cpu_types[0] is the only valid entry. Besides, enumeration on mc->valid_cpu_types[0] when we have mutiple valid entries there is avoided to increase the code readability, as suggested by Philippe Mathieu-Daudé. Signed-off-by: Gavin Shan --- hw/core/machine.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/hw/core/machine.c b/hw/core/machine.c index 1797e002f9..c58c84abf5 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -1399,7 +1399,7 @@ static bool is_cpu_type_supported(const MachineState *machine, Error **errp) * CPU types have been determined. Note that the user specified CPU * type is provided through '-cpu' option. */ - if (mc->valid_cpu_types && machine->cpu_type) { + if (machine->cpu_type && mc->valid_cpu_types && mc->valid_cpu_types[0]) { for (i = 0; mc->valid_cpu_types[i]; i++) { if (object_class_dynamic_cast(oc, mc->valid_cpu_types[i])) { break; @@ -1409,13 +1409,19 @@ static bool is_cpu_type_supported(const MachineState *machine, Error **errp) /* The user specified CPU type isn't valid */ if (!mc->valid_cpu_types[i]) { error_setg(errp, "Invalid CPU type: %s", machine->cpu_type); - error_append_hint(errp, "The valid types are: %s", - mc->valid_cpu_types[0]); - for (i = 1; mc->valid_cpu_types[i]; i++) { - error_append_hint(errp, ", %s", mc->valid_cpu_types[i]); + if (!mc->valid_cpu_types[1]) { + error_append_hint(errp, "The only valid type is: %s\n", + mc->valid_cpu_types[0]); + } else { + error_append_hint(errp, "The valid types are: "); + for (i = 0; mc->valid_cpu_types[i]; i++) { + error_append_hint(errp, "%s%s", + mc->valid_cpu_types[i], + mc->valid_cpu_types[i + 1] ? ", " : ""); + } + error_append_hint(errp, "\n"); } - error_append_hint(errp, "\n"); return false; } }