From patchwork Thu Jan 12 14:03:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Mammedov X-Patchwork-Id: 13098130 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 92DABC677F1 for ; Thu, 12 Jan 2023 14:32:31 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pFyBc-0002jV-V0; Thu, 12 Jan 2023 09:04:09 -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 1pFyBP-0002M4-NH for qemu-devel@nongnu.org; Thu, 12 Jan 2023 09:03:55 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pFyBO-00064J-1B for qemu-devel@nongnu.org; Thu, 12 Jan 2023 09:03:55 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1673532233; 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=7brEE8KbU/icKbuJywLodwZB28Qr2jpZI5OqQ0Eti9s=; b=dWJhYQoBY36PHhlgY5VmNZAZAT8pm7sK78/O/0VqBM0eF779Vu0AtMHQmlGqB7wuzDF9w9 QKkC0O9Gy3zyAv2iz3uNsrKzL9zDeyIuXFZo9DBp2Hp6J/+HSP6SDrkTr/BBr0VhtsHNvE UDNz5rsf6Z+w+P1myPPrjZeZtMyC6ks= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-16-AjC1-yrqOA6I0NCtwngTpg-1; Thu, 12 Jan 2023 09:03:51 -0500 X-MC-Unique: AjC1-yrqOA6I0NCtwngTpg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id D8D392807D77; Thu, 12 Jan 2023 14:03:44 +0000 (UTC) Received: from dell-r430-03.lab.eng.brq2.redhat.com (dell-r430-03.lab.eng.brq2.redhat.com [10.37.153.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id 530C84085720; Thu, 12 Jan 2023 14:03:44 +0000 (UTC) From: Igor Mammedov To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Ani Sinha Subject: [PATCH 39/40] pcihp: generate populated non-hotpluggble slot descriptions on non-hotplug path Date: Thu, 12 Jan 2023 15:03:11 +0100 Message-Id: <20230112140312.3096331-40-imammedo@redhat.com> In-Reply-To: <20230112140312.3096331-1-imammedo@redhat.com> References: <20230112140312.3096331-1-imammedo@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 Received-SPF: pass client-ip=170.10.133.124; envelope-from=imammedo@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_H2=-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: 2.1.29 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 Generating slots descriptions populated by non-hotpluggable devices is akward at best and complicates hotplug path (build_append_pcihp_slots) needlessly, and builds only dynamic _DSM for such slots which is overlkill. Clean it up and let non-hotplug path (build_append_pci_bus_devices) to handle that task. Such clean up effectively drops dynamic _DSM methods on non-hotpluggable slots (even though bus itself is hotpluggable), but in practice it affects only built-in devices (ide controllers/various bridges) that don't use acpi-index anyways so effectively it doesn't matter (NICs are hotpluggble). Follow up series will add static _DSM for non-hotpluggble devices/buses that will not depend on ACPI PCI hotplug at all, and potentially would allows us to reuse non-hotplug path elsewhere (PBX/microvm/arm-virt), including new support for acpi-index for non-hotpluggable devices. Signed-off-by: Igor Mammedov --- hw/i386/acpi-build.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 50504578b9..c085bf7812 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -414,6 +414,7 @@ static bool is_devfn_ignored_hotplug(const int devfn, const PCIBus *bus) PCIDevice *pdev = bus->devices[devfn]; if (pdev) { return is_devfn_ignored_generic(devfn, bus) || + !DEVICE_GET_CLASS(pdev)->hotpluggable || /* Cold plugged bridges aren't themselves hot-pluggable */ (IS_PCI_BRIDGE(pdev) && !DEVICE(pdev)->hotplugged); } else { /* non populated slots */ @@ -440,17 +441,14 @@ static void build_append_pcihp_slots(Aml *parent_scope, PCIBus *bus, notify_method = aml_method("DVNT", 2, AML_NOTSERIALIZED); for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { - PCIDevice *pdev = bus->devices[devfn]; int slot = PCI_SLOT(devfn); int adr = slot << 16 | PCI_FUNC(devfn); - bool hotpluggbale_slot = true; if (is_devfn_ignored_hotplug(devfn, bus)) { continue; } - if (pdev) { - hotpluggbale_slot = DEVICE_GET_CLASS(pdev)->hotpluggable; + if (bus->devices[devfn]) { dev = aml_scope("S%.02X", devfn); } else { dev = aml_device("S%.02X", devfn); @@ -464,17 +462,15 @@ static void build_append_pcihp_slots(Aml *parent_scope, PCIBus *bus, aml_append(dev, aml_name_decl("ASUN", aml_int(slot))); aml_append(dev, aml_pci_device_dsm()); - if (hotpluggbale_slot) { - aml_append(dev, aml_name_decl("_SUN", aml_int(slot))); - /* add _EJ0 to make slot hotpluggable */ - method = aml_method("_EJ0", 1, AML_NOTSERIALIZED); - aml_append(method, - aml_call2("PCEJ", aml_name("BSEL"), aml_name("_SUN")) - ); - aml_append(dev, method); + aml_append(dev, aml_name_decl("_SUN", aml_int(slot))); + /* add _EJ0 to make slot hotpluggable */ + method = aml_method("_EJ0", 1, AML_NOTSERIALIZED); + aml_append(method, + aml_call2("PCEJ", aml_name("BSEL"), aml_name("_SUN")) + ); + aml_append(dev, method); - build_append_pcihp_notify_entry(notify_method, slot); - } + build_append_pcihp_notify_entry(notify_method, slot); /* device descriptor has been composed, add it into parent context */ aml_append(parent_scope, dev); @@ -493,8 +489,9 @@ void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus) for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { /* ACPI spec: 1.0b: Table 6-2 _ADR Object Bus Types, PCI type */ int adr = PCI_SLOT(devfn) << 16 | PCI_FUNC(devfn); + PCIDevice *pdev = bus->devices[devfn]; - if (!bus->devices[devfn] || is_devfn_ignored_generic(devfn, bus)) { + if (!pdev || is_devfn_ignored_generic(devfn, bus)) { continue; }