From patchwork Fri Jul 10 16:17:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Mammedov X-Patchwork-Id: 278069 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=-9.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=unavailable 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 A0C5AC433DF for ; Fri, 10 Jul 2020 16:34:05 +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 6879E20657 for ; Fri, 10 Jul 2020 16:34:05 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Fri, 10 Jul 2020 16:17:13 +0000 (UTC) Received: from dell-r430-03.lab.eng.brq.redhat.com (dell-r430-03.lab.eng.brq.redhat.com [10.37.153.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0829E7EFA5; Fri, 10 Jul 2020 16:17:11 +0000 (UTC) From: Igor Mammedov To: qemu-devel@nongnu.org Subject: [RFC 2/3] x86: cphp: prevent guest crash on CPU hotplug when broadcast SMI is in use Date: Fri, 10 Jul 2020 12:17:03 -0400 Message-Id: <20200710161704.309824-3-imammedo@redhat.com> In-Reply-To: <20200710161704.309824-1-imammedo@redhat.com> References: <20200710161704.309824-1-imammedo@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.120; envelope-from=imammedo@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/10 04:36:30 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, 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_H2=-1, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lersek@redhat.com, boris.ostrovsky@oracle.com, liran.alon@oracle.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" There were reports of guest crash on CPU hotplug, when using q35 machine type and QVMF with Secure Boot, due to hotplugged CPU trying to process SMI at default SMI handler location without it being relocated by firmware first. Fix it by refusing hotplug if firmware hasn't negotiatiad CPU hotplug SMI support while SMI broadcast is in use. Signed-off-by: Igor Mammedov --- hw/acpi/ich9.c | 12 +++++++++++- hw/i386/pc.c | 11 +++++++++++ 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c index 2d204babc6..a22b434e0b 100644 --- a/hw/acpi/ich9.c +++ b/hw/acpi/ich9.c @@ -408,10 +408,20 @@ void ich9_pm_device_pre_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, ICH9LPCState *lpc = ICH9_LPC_DEVICE(hotplug_dev); if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM) && - !lpc->pm.acpi_memory_hotplug.is_enabled) + !lpc->pm.acpi_memory_hotplug.is_enabled) { error_setg(errp, "memory hotplug is not enabled: %s.memory-hotplug-support " "is not set", object_get_typename(OBJECT(lpc))); + } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { + uint64_t negotiated = lpc->smi_negotiated_features; + + if (negotiated & BIT_ULL(ICH9_LPC_SMI_F_BROADCAST_BIT) && + !(negotiated & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT))) { + error_setg(errp, "cpu hotplug SMI was not enabled by firmware"); + error_append_hint(errp, "update machine type to newer than 5.0 " + "and firmware that suppors CPU hotplug in Secure Boot mode"); + } + } } void ich9_pm_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 6fe80c84d7..dc1e9157d7 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1508,6 +1508,17 @@ static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev, return; } + if (pcms->acpi_dev) { + Error *local_err = NULL; + + hotplug_handler_pre_plug(HOTPLUG_HANDLER(pcms->acpi_dev), dev, + &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + } + init_topo_info(&topo_info, x86ms); env->nr_dies = x86ms->smp_dies;