From patchwork Thu Jan 12 14:02:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Mammedov X-Patchwork-Id: 13098153 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 01A2FC54EBD for ; Thu, 12 Jan 2023 14:51:54 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pFyBR-0002Nq-G9; Thu, 12 Jan 2023 09:03:57 -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 1pFyBC-00028j-25 for qemu-devel@nongnu.org; Thu, 12 Jan 2023 09:03:44 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pFyB8-0005vf-91 for qemu-devel@nongnu.org; Thu, 12 Jan 2023 09:03:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1673532215; 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=cpd+L+e8tfIbdW2dfBneIXiktjk4fSoDV822NGXpYHE=; b=hSZaMKskvuSJSMq31xcj3xBmQPeCpB0vtf98glFJXehMqhCI2qDmYMsW1uLuozpIF60OQs rO51zpW+ujnXOJ1hvThMDgBO4zamK8xxp1hup8wDhjnbrGcJZib5U2jYzIoVSgsdalWyfz VKLPvOk3RfF1Pq1g5Hyj4ofu6Ar3tfg= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-619-Mg7Q9klJP1KBUEjSJ2Kz7w-1; Thu, 12 Jan 2023 09:03:32 -0500 X-MC-Unique: Mg7Q9klJP1KBUEjSJ2Kz7w-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 E996C802D2A; Thu, 12 Jan 2023 14:03:31 +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 64AAB4085720; Thu, 12 Jan 2023 14:03:31 +0000 (UTC) From: Igor Mammedov To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Ani Sinha Subject: [PATCH 22/40] pcihp: do not put empty PCNT in DSDT Date: Thu, 12 Jan 2023 15:02:54 +0100 Message-Id: <20230112140312.3096331-23-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=170.10.129.124; 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 count number of PCNT methods that actually call Notify and if there aren't any, drop PCNT altogether. It mostly affects 'Q35' tests where there is no root-ports /bridges attached and 'PC' machine when ACPI PCI hotplug is completely disabled. Expected ASL change: - Method (PCNT, 0, NotSerialized) - { - } ... Method (_E01, 0, NotSerialized) // _Exx: Edge-Triggered GPE { - Acquire (\_SB.PCI0.BLCK, 0xFFFF) - \_SB.PCI0.PCNT () - Release (\_SB.PCI0.BLCK) } Signed-off-by: Igor Mammedov --- hw/i386/acpi-build.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 509a4c500d..9edd7bf38e 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -498,12 +498,13 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus, qobject_unref(bsel); } -static void build_append_notfication_callback(Aml *parent_scope, +static bool build_append_notfication_callback(Aml *parent_scope, const PCIBus *bus) { Aml *method; PCIBus *sec; QObject *bsel; + int nr_notifiers = 0; QLIST_FOREACH(sec, &bus->child, sibling) { Aml *br_scope = aml_scope("S%.02X", sec->parent_dev->devfn); @@ -511,7 +512,8 @@ static void build_append_notfication_callback(Aml *parent_scope, !object_property_find(OBJECT(sec), ACPI_PCIHP_PROP_BSEL)) { continue; } - build_append_notfication_callback(br_scope, sec); + nr_notifiers = nr_notifiers + + build_append_notfication_callback(br_scope, sec); aml_append(parent_scope, br_scope); } @@ -532,6 +534,7 @@ static void build_append_notfication_callback(Aml *parent_scope, aml_int(1))); /* Device Check */ aml_append(method, aml_call2("DVNT", aml_name("PCID"), aml_int(3))); /* Eject Request */ + nr_notifiers++; } /* Notify about child bus events in any case */ @@ -546,6 +549,7 @@ static void build_append_notfication_callback(Aml *parent_scope, aml_append(parent_scope, method); qobject_unref(bsel); + return !!nr_notifiers; } static Aml *aml_pci_pdsm(void) @@ -1744,20 +1748,26 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, aml_append(dsdt, sb_scope); if (pm->pcihp_bridge_en || pm->pcihp_root_en) { + bool has_pcnt; + Object *pci_host = acpi_get_i386_pci_host(); PCIBus *bus = PCI_HOST_BRIDGE(pci_host)->bus; scope = aml_scope("\\_SB.PCI0"); - build_append_notfication_callback(scope, bus); - aml_append(dsdt, scope); + has_pcnt = build_append_notfication_callback(scope, bus); + if (has_pcnt) { + aml_append(dsdt, scope); + } scope = aml_scope("_GPE"); { method = aml_method("_E01", 0, AML_NOTSERIALIZED); - aml_append(method, - aml_acquire(aml_name("\\_SB.PCI0.BLCK"), 0xFFFF)); - aml_append(method, aml_call0("\\_SB.PCI0.PCNT")); - aml_append(method, aml_release(aml_name("\\_SB.PCI0.BLCK"))); + if (has_pcnt) { + aml_append(method, + aml_acquire(aml_name("\\_SB.PCI0.BLCK"), 0xFFFF)); + aml_append(method, aml_call0("\\_SB.PCI0.PCNT")); + aml_append(method, aml_release(aml_name("\\_SB.PCI0.BLCK"))); + } aml_append(scope, method); } aml_append(dsdt, scope);