From patchwork Thu Sep 17 10:09:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ani Sinha X-Patchwork-Id: 1366032 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=anisinha.ca Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=anisinha-ca.20150623.gappssmtp.com header.i=@anisinha-ca.20150623.gappssmtp.com header.a=rsa-sha256 header.s=20150623 header.b=YAAoets1; dkim-atps=neutral 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 ozlabs.org (Postfix) with ESMTPS id 4BsXz33zpmz9sRf for ; Thu, 17 Sep 2020 20:20:15 +1000 (AEST) Received: from localhost ([::1]:49138 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kIr1R-0003Ot-Ge for incoming@patchwork.ozlabs.org; Thu, 17 Sep 2020 06:20:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60372) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kIqsE-0000aa-08 for qemu-devel@nongnu.org; Thu, 17 Sep 2020 06:10:42 -0400 Received: from mail-pf1-x442.google.com ([2607:f8b0:4864:20::442]:40815) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kIqs8-0003VT-UH for qemu-devel@nongnu.org; Thu, 17 Sep 2020 06:10:41 -0400 Received: by mail-pf1-x442.google.com with SMTP id x123so907507pfc.7 for ; Thu, 17 Sep 2020 03:10:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=anisinha-ca.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=HieR0JUcIVqOsEn9fSMCcXQosTZo8bCqKBMgyay5mK4=; b=YAAoets1QDPYHUhWMfXkUk95L+Y6wpNKhWEiS9PDVYF3Z2k42Vqjq//ZtJvnq8kVpN vkTPGmTJNuCzOUcxAHf5a6Hu7NT1r5j0xGKNe95Xc9xTVxso8k3d9wN9BmpL0BMMgCYf Gw+rmhK85pl6oH7gedfn2EaOO/HlS2sSiXhOIYMGloGutomo8NQYeacBi3LgwO9QDFRf qTn4qhTUFq/ibfStWBF9toVAdzSCvL1yqUHA4ShR6XmU10DKG8OH9OFWLNdXux8rtY4U j7IBI1Ok0JgB8lFXF3W9/rq9FUcruPlngmieaIWo/uyyCOxo+KZot59NL8Qd8oXdR/oi uq+A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=HieR0JUcIVqOsEn9fSMCcXQosTZo8bCqKBMgyay5mK4=; b=beQ02oRhkKEYTBDdIMYXuXBqRq1ddHKDeNEXUsO9sGnJOawcRS3OnPb2hIvqZ+MD6d jfnAKEHRhF+4ArKCpdoODucmhNknfjHiWa0vf06a2W/dz9sEtxdt7N6Va+aNq59Ms1jo SjyyBhQlPss0vi0CqMEOpkTdzQFTy0I5TYQhQk0u+czmowAUtxu2ft7I3zOBLRdZG+GV GxW4izznr/PUy1hA58Tj88Re0owmCJWPDZI/vtC0rocVGGaBHd04wm/7QKtZT7kuAyEo UT3OPNlckE/dPZyKPKlBp42cnhE30X7EO4UVmBPzYoe9yBOQDYpLKDqYNgN/k27sObW+ 75Bg== X-Gm-Message-State: AOAM533A/j0WxpdQ89WY1Hvy+4IHlPxTPe0XdXntUyM4FQjerasifpKk YsquN4euv87I4VxcXMo+O0rLlWPL0bZfKQoy X-Google-Smtp-Source: ABdhPJyEWuxRw+3cCmUqxToUpG962vH4eU92n3X80jjZPbJVoi1GBTL+CDxAZ1VO90E179ZbdPjBdA== X-Received: by 2002:a63:4c09:: with SMTP id z9mr20616128pga.200.1600337435215; Thu, 17 Sep 2020 03:10:35 -0700 (PDT) Received: from localhost.localdomain ([115.96.122.113]) by smtp.googlemail.com with ESMTPSA id d20sm5241559pjv.39.2020.09.17.03.10.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Sep 2020 03:10:34 -0700 (PDT) From: Ani Sinha To: qemu-devel@nongnu.org Subject: [PATCH v7 09/12] piix4: don't reserve hw resources when hotplug is off globally Date: Thu, 17 Sep 2020 15:39:44 +0530 Message-Id: <20200917100947.21106-10-ani@anisinha.ca> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200917100947.21106-1-ani@anisinha.ca> References: <20200917100947.21106-1-ani@anisinha.ca> Received-SPF: none client-ip=2607:f8b0:4864:20::442; envelope-from=ani@anisinha.ca; helo=mail-pf1-x442.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=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: Laurent Vivier , Thomas Huth , Eduardo Habkost , "Michael S. Tsirkin" , jusual@redhat.com, =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Aleksandar Markovic , Paolo Bonzini , Ani Sinha , Igor Mammedov , Aurelien Jarno , Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" When acpi hotplug is turned off for both root pci bus as well as for pci bridges, we should not generate the related ACPI code for DSDT table or initialize related hw ports or reserve hw resources. This change makes sure all those operations are turned off in the case ACPI pci hotplug is off globally. In this change, we also make sure ACPI code for the PCNT method are only added when bsel is enabled for the corresponding pci bus or bridge hotplug is turned on. As q35 machines do not use bsel for it's pci buses at this point in time, this change affects DSDT acpi table for q35 machines as well. Therefore, we will also need to commit the updated golden master DSDT table acpi binary blobs as well. This is done in the following commit. Without the updated table blobs, the unit tests would fail with this patch. Signed-off-by: Ani Sinha --- hw/acpi/piix4.c | 6 ++++-- hw/i386/acpi-build.c | 25 ++++++++++++++++++------- 2 files changed, 22 insertions(+), 9 deletions(-) diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c index e6163bb6ce..b70b1f98af 100644 --- a/hw/acpi/piix4.c +++ b/hw/acpi/piix4.c @@ -596,8 +596,10 @@ static void piix4_acpi_system_hot_add_init(MemoryRegion *parent, "acpi-gpe0", GPE_LEN); memory_region_add_subregion(parent, GPE_BASE, &s->io_gpe); - acpi_pcihp_init(OBJECT(s), &s->acpi_pci_hotplug, bus, parent, - s->use_acpi_hotplug_bridge); + if (s->use_acpi_hotplug_bridge || s->use_acpi_root_pci_hotplug) { + acpi_pcihp_init(OBJECT(s), &s->acpi_pci_hotplug, bus, parent, + s->use_acpi_hotplug_bridge); + } s->cpu_hotplug_legacy = true; object_property_add_bool(OBJECT(s), "cpu-hotplug-legacy", diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index e079b686f5..e41bb0992b 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -95,6 +95,7 @@ typedef struct AcpiPmInfo { bool s3_disabled; bool s4_disabled; bool pcihp_bridge_en; + bool pcihp_root_en; uint8_t s4_val; AcpiFadtData fadt; uint16_t cpu_hp_io_base; @@ -245,6 +246,9 @@ static void acpi_get_pm_info(MachineState *machine, AcpiPmInfo *pm) pm->pcihp_bridge_en = object_property_get_bool(obj, "acpi-pci-hotplug-with-bridge-support", NULL); + pm->pcihp_root_en = + object_property_get_bool(obj, "acpi-root-pci-hotplug", + NULL); } static void acpi_get_misc_info(AcpiMiscInfo *info) @@ -450,10 +454,12 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus, } /* Append PCNT method to notify about events on local and child buses. - * Add unconditionally for root since DSDT expects it. + * Add this method for root bus only when hotplug is enabled since DSDT + * expects it. */ - method = aml_method("PCNT", 0, AML_NOTSERIALIZED); - + if (bsel || pcihp_bridge_en) { + method = aml_method("PCNT", 0, AML_NOTSERIALIZED); + } /* If bus supports hotplug select it and notify about local events */ if (bsel) { uint64_t bsel_val = qnum_get_uint(qobject_to(QNum, bsel)); @@ -479,7 +485,10 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus, aml_append(method, aml_name("^S%.02X.PCNT", devfn)); } } - aml_append(parent_scope, method); + + if (bsel || pcihp_bridge_en) { + aml_append(parent_scope, method); + } qobject_unref(bsel); } @@ -1504,7 +1513,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, build_hpet_aml(dsdt); build_piix4_isa_bridge(dsdt); build_isa_devices_aml(dsdt); - build_piix4_pci_hotplug(dsdt); + if (pm->pcihp_bridge_en || pm->pcihp_root_en) { + build_piix4_pci_hotplug(dsdt); + } build_piix4_pci0_int(dsdt); } else { sb_scope = aml_scope("_SB"); @@ -1546,7 +1557,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, { aml_append(scope, aml_name_decl("_HID", aml_string("ACPI0006"))); - if (misc->is_piix4) { + if (misc->is_piix4 && (pm->pcihp_bridge_en || pm->pcihp_root_en)) { method = aml_method("_E01", 0, AML_NOTSERIALIZED); aml_append(method, aml_acquire(aml_name("\\_SB.PCI0.BLCK"), 0xFFFF)); @@ -1698,7 +1709,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, crs_range_set_free(&crs_range_set); /* reserve PCIHP resources */ - if (pm->pcihp_io_len) { + if (pm->pcihp_io_len && (pm->pcihp_bridge_en || pm->pcihp_root_en)) { dev = aml_device("PHPR"); aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A06"))); aml_append(dev,