From patchwork Fri Nov 20 23:42:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kurz X-Patchwork-Id: 11922923 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 416FAC2D0E4 for ; Fri, 20 Nov 2020 23:48:27 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C4929208CA for ; Fri, 20 Nov 2020 23:48:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C4929208CA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kaod.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:49882 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kgG8f-0004jc-Qm for qemu-devel@archiver.kernel.org; Fri, 20 Nov 2020 18:48:25 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:42968) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kgG31-00068T-02 for qemu-devel@nongnu.org; Fri, 20 Nov 2020 18:42:35 -0500 Received: from us-smtp-delivery-44.mimecast.com ([207.211.30.44]:44215) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kgG2x-0003qg-3n for qemu-devel@nongnu.org; Fri, 20 Nov 2020 18:42:34 -0500 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-427-WnjQsAg_M9eiGMbRVaTiLQ-1; Fri, 20 Nov 2020 18:42:26 -0500 X-MC-Unique: WnjQsAg_M9eiGMbRVaTiLQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 518C88030BF; Fri, 20 Nov 2020 23:42:25 +0000 (UTC) Received: from bahia.redhat.com (ovpn-112-44.ams2.redhat.com [10.36.112.44]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1C92F60BFA; Fri, 20 Nov 2020 23:42:21 +0000 (UTC) From: Greg Kurz To: qemu-devel@nongnu.org Subject: [PATCH for-6.0 8/9] spapr: Do TPM proxy hotplug sanity checks at pre-plug Date: Sat, 21 Nov 2020 00:42:07 +0100 Message-Id: <20201120234208.683521-9-groug@kaod.org> In-Reply-To: <20201120234208.683521-1-groug@kaod.org> References: <20201120234208.683521-1-groug@kaod.org> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=groug@kaod.org X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: kaod.org Received-SPF: softfail client-ip=207.211.30.44; envelope-from=groug@kaod.org; helo=us-smtp-delivery-44.mimecast.com X-Spam_score_int: -11 X-Spam_score: -1.2 X-Spam_bar: - X-Spam_report: (-1.2 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_SOFTFAIL=0.665 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Igor Mammedov , qemu-ppc@nongnu.org, Greg Kurz , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" There can be only one TPM proxy at a time. This is currently checked at plug time. But this can be detected at pre-plug in order to error out earlier. This allows to get rid of error handling in the plug handler. Signed-off-by: Greg Kurz --- hw/ppc/spapr.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index bded059d59c8..5e32d1d396b4 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -3957,17 +3957,28 @@ static void spapr_phb_unplug_request(HotplugHandler *hotplug_dev, } } -static void spapr_tpm_proxy_plug(HotplugHandler *hotplug_dev, DeviceState *dev, - Error **errp) +static +bool spapr_tpm_proxy_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev, + Error **errp) { SpaprMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev)); - SpaprTpmProxy *tpm_proxy = SPAPR_TPM_PROXY(dev); if (spapr->tpm_proxy != NULL) { error_setg(errp, "Only one TPM proxy can be specified for this machine"); - return; + return false; } + return true; +} + +static void spapr_tpm_proxy_plug(HotplugHandler *hotplug_dev, DeviceState *dev) +{ + SpaprMachineState *spapr = SPAPR_MACHINE(OBJECT(hotplug_dev)); + SpaprTpmProxy *tpm_proxy = SPAPR_TPM_PROXY(dev); + + /* Already checked in spapr_tpm_proxy_pre_plug() */ + g_assert(spapr->tpm_proxy == NULL); + spapr->tpm_proxy = tpm_proxy; } @@ -3990,7 +4001,7 @@ static void spapr_machine_device_plug(HotplugHandler *hotplug_dev, } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) { spapr_phb_plug(hotplug_dev, dev); } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_TPM_PROXY)) { - spapr_tpm_proxy_plug(hotplug_dev, dev, errp); + spapr_tpm_proxy_plug(hotplug_dev, dev); } } @@ -4053,6 +4064,8 @@ static void spapr_machine_device_pre_plug(HotplugHandler *hotplug_dev, spapr_core_pre_plug(hotplug_dev, dev, errp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) { spapr_phb_pre_plug(hotplug_dev, dev, errp); + } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_TPM_PROXY)) { + spapr_tpm_proxy_pre_plug(hotplug_dev, dev, errp); } }