From nobody Fri Dec 19 17:15:06 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 162613731698365.70383156317075; Mon, 12 Jul 2021 17:48:36 -0700 (PDT) Received: from localhost ([::1]:57066 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m36bE-0005Ec-1k for importer@patchew.org; Mon, 12 Jul 2021 20:48:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50238) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m36We-0005pv-AM for qemu-devel@nongnu.org; Mon, 12 Jul 2021 20:43:52 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:55609) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m36Wc-0002pY-6x for qemu-devel@nongnu.org; Mon, 12 Jul 2021 20:43:52 -0400 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-525-xbtPjRbjMVKuc1HA1y5gYw-1; Mon, 12 Jul 2021 20:43:47 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4FFD0362F8; Tue, 13 Jul 2021 00:43:46 +0000 (UTC) Received: from pc-58.home (unknown [10.40.192.104]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 789AE5C1D1; Tue, 13 Jul 2021 00:43:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1626137028; 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=mJE30V6uYozBPn5f3frAffD2y3qF0aWBsl72KNwCxEc=; b=fWv9ewoq5RL/WehQLH3MWOAtzGH/niOyVHbypBb0Q8EeULMzP05IA3DhQoL60ttIpawEQX irNAKYJwkzCGKrcOWm5ehjhm4a8K5b+EY90REm6AEglc429qhEp0vk5UPJPb6U1LhP6De+ szejYH3kCfBlhJd3MBkZc8ejdcMCRMU= X-MC-Unique: xbtPjRbjMVKuc1HA1y5gYw-1 From: Julia Suvorova To: qemu-devel@nongnu.org Subject: [PATCH v6 5/6] hw/acpi/ich9: Set ACPI PCI hot-plug as default on Q35 Date: Tue, 13 Jul 2021 02:42:04 +0200 Message-Id: <20210713004205.775386-6-jusual@redhat.com> In-Reply-To: <20210713004205.775386-1-jusual@redhat.com> References: <20210713004205.775386-1-jusual@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jusual@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; envelope-from=jusual@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.699, 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: Igor Mammedov , David Gibson , Julia Suvorova , "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1626137317915100001 Content-Type: text/plain; charset="utf-8" Q35 has three different types of PCI devices hot-plug: PCIe Native, SHPC Native and ACPI hot-plug. This patch changes the default choice for cold-plugged bridges from PCIe Native to ACPI Hot-plug with ability to use SHPC and PCIe Native for hot-plugged bridges. This is a list of the PCIe Native hot-plug issues that led to this change: * no racy behavior during boot (see 110c477c2ed) * no delay during deleting - after the actual power off software must wait at least 1 second before indicating about it. This case is quite important for users, it even has its own bug: https://bugzilla.redhat.com/show_bug.cgi?id=3D1594168 * no timer-based behavior - in addition to the previous example, the attention button has a 5-second waiting period, during which the operation can be canceled with a second press. While this looks fine for manual button control, automation will result in the need to queue or drop events, and the software receiving events in all sort of unspecified combinations of attention/power indicator states, which is racy and uppredictable. * fixes: * https://bugzilla.redhat.com/show_bug.cgi?id=3D1752465 * https://bugzilla.redhat.com/show_bug.cgi?id=3D1690256 To return to PCIe Native hot-plug: -global ICH9-LPC.acpi-pci-hotplug-with-bridge-support=3Doff Signed-off-by: Julia Suvorova Reviewed-by: Igor Mammedov --- hw/acpi/ich9.c | 2 +- hw/i386/pc.c | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c index 2f4eb453ac..778e27b659 100644 --- a/hw/acpi/ich9.c +++ b/hw/acpi/ich9.c @@ -427,7 +427,7 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs = *pm) pm->disable_s3 =3D 0; pm->disable_s4 =3D 0; pm->s4_val =3D 2; - pm->use_acpi_hotplug_bridge =3D false; + pm->use_acpi_hotplug_bridge =3D true; =20 object_property_add_uint32_ptr(obj, ACPI_PM_PROP_PM_IO_BASE, &pm->pm_io_base, OBJ_PROP_FLAG_READ); diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 8e1220db72..7e03848792 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -98,6 +98,7 @@ GlobalProperty pc_compat_6_0[] =3D { { "qemu64" "-" TYPE_X86_CPU, "family", "6" }, { "qemu64" "-" TYPE_X86_CPU, "model", "6" }, { "qemu64" "-" TYPE_X86_CPU, "stepping", "3" }, + { "ICH9-LPC", "acpi-pci-hotplug-with-bridge-support", "off" }, }; const size_t pc_compat_6_0_len =3D G_N_ELEMENTS(pc_compat_6_0); =20 --=20 2.30.2