From patchwork Fri Dec 11 04:14:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 11967179 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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 45EEAC4167B for ; Fri, 11 Dec 2020 04:21:31 +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 D9B9023ED2 for ; Fri, 11 Dec 2020 04:21:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D9B9023ED2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:35522 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1knZvt-0003ae-SP for qemu-devel@archiver.kernel.org; Thu, 10 Dec 2020 23:21:29 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:33940) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1knZq7-0005bj-Qn; Thu, 10 Dec 2020 23:15:32 -0500 Received: from ozlabs.org ([203.11.71.1]:37189) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1knZq5-0000iz-U3; Thu, 10 Dec 2020 23:15:31 -0500 Received: by ozlabs.org (Postfix, from userid 1007) id 4Cscrb1X3Qz9sWd; Fri, 11 Dec 2020 15:15:11 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1607660111; bh=dfSUJWYE8sTfFwFiC7FMYXVMBsIlriqEh85KB+TT7Xc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Emc9jhJsQfYg9tOiRkl3opE9cqAwvtMjNM3JFkCCinu/NM7PBAkCXTjd9pnJ5xos/ frPdi2MpUwj1VwsZD49lOEUFFHdrRPrk6MKd8FVoeBIkGbYIcNNza9phWHpqufRMcY tqDhaPXqzL3h9AcuBNEbtdQfzo7/puMYP09RS1b0= From: David Gibson To: peter.maydell@linaro.org Subject: [PULL 07/30] spapr: Do TPM proxy hotplug sanity checks at pre-plug Date: Fri, 11 Dec 2020 15:14:44 +1100 Message-Id: <20201211041507.425378-8-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201211041507.425378-1-david@gibson.dropbear.id.au> References: <20201211041507.425378-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Received-SPF: pass client-ip=203.11.71.1; envelope-from=dgibson@ozlabs.org; helo=ozlabs.org X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 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: David Gibson , qemu-ppc@nongnu.org, qemu-devel@nongnu.org, groug@kaod.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Greg Kurz 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 Message-Id: <20201120234208.683521-9-groug@kaod.org> Signed-off-by: David Gibson --- 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 b270172369..7e954bc84b 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -3974,17 +3974,28 @@ 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; } @@ -4007,7 +4018,7 @@ 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); } } @@ -4070,6 +4081,8 @@ 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); } }