From patchwork Tue Aug 18 21:52:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julia Suvorova X-Patchwork-Id: 11722233 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 55EC41575 for ; Tue, 18 Aug 2020 21:57:50 +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 2CF2A20709 for ; Tue, 18 Aug 2020 21:57:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="bc2kdDXV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2CF2A20709 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:56828 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k89c5-0005LU-GP for patchwork-qemu-devel@patchwork.kernel.org; Tue, 18 Aug 2020 17:57:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48660) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k89ZY-0001D4-NB for qemu-devel@nongnu.org; Tue, 18 Aug 2020 17:55:12 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:34770 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1k89ZW-0007ft-V0 for qemu-devel@nongnu.org; Tue, 18 Aug 2020 17:55:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1597787710; 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=zz2tH4BT/ZCHpEwxA/sq/JDVNa6IRW375UQRDz8+Dvo=; b=bc2kdDXVBCpZB/VLr9CAlpnoF8Hj5P20EKWBaa+xa08SpcxrCZTa7DyGAPW+8Yb8OLkpa9 ILPDDyJbm5HIxN0IfBRu/Vk5Jg+v2YUe89Gk5m3hZjOHRjQxd2BW3DcxdoAyp589rQzEWA 4l7G5jwH9HSdVIEPa2ymW2+0fkniiYc= 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-516-wxT4Rjt0M-2F0NtlekFJlw-1; Tue, 18 Aug 2020 17:55:08 -0400 X-MC-Unique: wxT4Rjt0M-2F0NtlekFJlw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 99815100746F; Tue, 18 Aug 2020 21:55:07 +0000 (UTC) Received: from localhost.localdomain.com (unknown [10.43.2.201]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 417751014171; Tue, 18 Aug 2020 21:55:06 +0000 (UTC) From: Julia Suvorova To: qemu-devel@nongnu.org Subject: [RFC PATCH v2 3/4] hw/i386/acpi-build: Turn off support of PCIe native hot-plug and SHPC in _OSC Date: Tue, 18 Aug 2020 23:52:26 +0200 Message-Id: <20200818215227.181654-4-jusual@redhat.com> In-Reply-To: <20200818215227.181654-1-jusual@redhat.com> References: <20200818215227.181654-1-jusual@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jusual@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.120; envelope-from=jusual@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/18 16:56:52 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, 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_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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 , Julia Suvorova , Gerd Hoffmann , "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Other methods may be used if the system is capable of this and the _OSC bit is set. Disable them explicitly to force ACPI PCI hot-plug use. The older versions will still use PCIe native. Signed-off-by: Julia Suvorova --- hw/i386/acpi-build.h | 11 +++++++++++ hw/i386/acpi-build.c | 21 +++++++++++++++------ 2 files changed, 26 insertions(+), 6 deletions(-) diff --git a/hw/i386/acpi-build.h b/hw/i386/acpi-build.h index 74df5fc612..6f94312c39 100644 --- a/hw/i386/acpi-build.h +++ b/hw/i386/acpi-build.h @@ -5,6 +5,17 @@ extern const struct AcpiGenericAddress x86_nvdimm_acpi_dsmio; +/* PCI Firmware Specification 3.2, Table 4-5 */ +typedef enum { + ACPI_OSC_NATIVE_HP_EN = 0, + ACPI_OSC_SHPC_EN = 1, + ACPI_OSC_PME_EN = 2, + ACPI_OSC_AER_EN = 3, + ACPI_OSC_PCIE_CAP_EN = 4, + ACPI_OSC_LTR_EN = 5, + ACPI_OSC_ALLONES_INVALID = 6, +} AcpiOSCField; + void acpi_setup(void); #endif diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index f3cd52bd06..c5f4802b8c 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -1411,7 +1411,7 @@ static void build_i386_pci_hotplug(Aml *table, uint64_t pcihp_addr) aml_append(table, scope); } -static Aml *build_q35_osc_method(void) +static Aml *build_q35_osc_method(AcpiPmInfo *pm) { Aml *if_ctx; Aml *if_ctx2; @@ -1419,6 +1419,7 @@ static Aml *build_q35_osc_method(void) Aml *method; Aml *a_cwd1 = aml_name("CDW1"); Aml *a_ctrl = aml_local(0); + unsigned osc_ctrl; method = aml_method("_OSC", 4, AML_NOTSERIALIZED); aml_append(method, aml_create_dword_field(aml_arg(3), aml_int(0), "CDW1")); @@ -1430,11 +1431,19 @@ static Aml *build_q35_osc_method(void) aml_append(if_ctx, aml_store(aml_name("CDW3"), a_ctrl)); + /* Always allow native PME, AER (depend on PCIE Capability Control) */ + osc_ctrl = BIT(ACPI_OSC_PME_EN) | BIT(ACPI_OSC_AER_EN) | + BIT(ACPI_OSC_PCIE_CAP_EN); + /* - * Always allow native PME, AER (no dependencies) - * Allow SHPC (PCI bridges can have SHPC controller) + * Guests seem to generally prefer native hot-plug control. + * Enable it only when we do not use ACPI hot-plug. */ - aml_append(if_ctx, aml_and(a_ctrl, aml_int(0x1F), a_ctrl)); + if (!pm->pcihp_bridge_en) { + osc_ctrl |= BIT(ACPI_OSC_NATIVE_HP_EN) | BIT(ACPI_OSC_SHPC_EN); + } + + aml_append(if_ctx, aml_and(a_ctrl, aml_int(osc_ctrl), a_ctrl)); if_ctx2 = aml_if(aml_lnot(aml_equal(aml_arg(1), aml_int(1)))); /* Unknown revision */ @@ -1514,7 +1523,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, aml_append(dev, aml_name_decl("_CID", aml_eisaid("PNP0A03"))); aml_append(dev, aml_name_decl("_ADR", aml_int(0))); aml_append(dev, aml_name_decl("_UID", aml_int(1))); - aml_append(dev, build_q35_osc_method()); + aml_append(dev, build_q35_osc_method(pm)); aml_append(sb_scope, dev); aml_append(dsdt, sb_scope); @@ -1590,7 +1599,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, if (pci_bus_is_express(bus)) { aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A08"))); aml_append(dev, aml_name_decl("_CID", aml_eisaid("PNP0A03"))); - aml_append(dev, build_q35_osc_method()); + aml_append(dev, build_q35_osc_method(pm)); } else { aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0A03"))); }