From patchwork Mon Mar 15 18:00:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Mammedov X-Patchwork-Id: 12140357 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=-13.6 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 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 3612CC433E0 for ; Mon, 15 Mar 2021 18:16:44 +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 D7FC064DF0 for ; Mon, 15 Mar 2021 18:16:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D7FC064DF0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:55452 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lLrli-0003JE-Ut for qemu-devel@archiver.kernel.org; Mon, 15 Mar 2021 14:16:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34294) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lLrX4-0001MB-GB for qemu-devel@nongnu.org; Mon, 15 Mar 2021 14:01:34 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:56444) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lLrX2-0008TG-FX for qemu-devel@nongnu.org; Mon, 15 Mar 2021 14:01:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1615831291; 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: in-reply-to:in-reply-to:references:references; bh=uSujXLTODn5r9rn7t65nMSl2p8WacSXGNR2GupPDUDs=; b=arDLFCEMtRanp1mDClIE6tKL964+dMYdA5mXT+A18cb+Vyluvx9krZGHLzhhkz/bkVjcvB wwrB1OeBtiw3nMoEPG6wmxVoreQqqFBQNaBsHG6NFa03TX1eNYPPRW77J8xQp05bqmRadu sdWEktBgkhWP/r6iamW7JQrKndKG94I= 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-410-fSA_HAjcPOyiz4ehUr_S1w-1; Mon, 15 Mar 2021 14:01:27 -0400 X-MC-Unique: fSA_HAjcPOyiz4ehUr_S1w-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 23DE5192D796 for ; Mon, 15 Mar 2021 18:01:14 +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 25AD8620DE; Mon, 15 Mar 2021 18:01:12 +0000 (UTC) From: Igor Mammedov To: qemu-devel@nongnu.org Subject: [PATCH 3/6] pci: acpi: ensure that acpi-index is unique Date: Mon, 15 Mar 2021 14:00:59 -0400 Message-Id: <20210315180102.3008391-4-imammedo@redhat.com> In-Reply-To: <20210315180102.3008391-1-imammedo@redhat.com> References: <20210315180102.3008391-1-imammedo@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=imammedo@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=imammedo@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.25, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: jusual@redhat.com, laine@redhat.com, mst@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" it helps to avoid device naming conflicts when guest OS is configured to use acpi-index for naming. Spec ialso says so: PCI Firmware Specification Revision 3.2 4.6.7. _DSM for Naming a PCI or PCI Express Device Under Operating Systems " Instance number must be unique under \_SB scope. This instance number does not have to be sequential in a given system configuration. " Signed-off-by: Igor Mammedov --- hw/acpi/pcihp.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c index ceab287bd3..f4cb3c979d 100644 --- a/hw/acpi/pcihp.c +++ b/hw/acpi/pcihp.c @@ -52,6 +52,21 @@ typedef struct AcpiPciHpFind { PCIBus *bus; } AcpiPciHpFind; +static gint g_cmp_uint32(gconstpointer a, gconstpointer b, gpointer user_data) +{ + return a - b; +} + +static GSequence *pci_acpi_index_list(void) +{ + static GSequence *used_acpi_index_list; + + if (!used_acpi_index_list) { + used_acpi_index_list = g_sequence_new(NULL); + } + return used_acpi_index_list; +} + static int acpi_pcihp_get_bsel(PCIBus *bus) { Error *local_err = NULL; @@ -277,6 +292,23 @@ void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev, ONBOARD_INDEX_MAX); return; } + + /* + * make sure that acpi-index is unique across all present PCI devices + */ + if (pdev->acpi_index) { + GSequence *used_indexes = pci_acpi_index_list(); + + if (g_sequence_lookup(used_indexes, GINT_TO_POINTER(pdev->acpi_index), + g_cmp_uint32, NULL)) { + error_setg(errp, "a PCI device with acpi-index = %" PRIu32 + " already exist", pdev->acpi_index); + return; + } + g_sequence_insert_sorted(used_indexes, + GINT_TO_POINTER(pdev->acpi_index), + g_cmp_uint32, NULL); + } } void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s, @@ -315,8 +347,22 @@ void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s, void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s, DeviceState *dev, Error **errp) { + PCIDevice *pdev = PCI_DEVICE(dev); + trace_acpi_pci_unplug(PCI_SLOT(PCI_DEVICE(dev)->devfn), acpi_pcihp_get_bsel(pci_get_bus(PCI_DEVICE(dev)))); + + /* + * clean up acpi-index so it could reused by another device + */ + if (pdev->acpi_index) { + GSequence *used_indexes = pci_acpi_index_list(); + + g_sequence_remove(g_sequence_lookup(used_indexes, + GINT_TO_POINTER(pdev->acpi_index), + g_cmp_uint32, NULL)); + } + qdev_unrealize(dev); }