From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10A98C433E6 for ; Tue, 23 Feb 2021 14:29:14 +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 8A9CF64E2E for ; Tue, 23 Feb 2021 14:29:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8A9CF64E2E 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:60018 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lEYga-00057U-HP for qemu-devel@archiver.kernel.org; Tue, 23 Feb 2021 09:29:12 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:38240) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lEYfo-0003qg-5V for qemu-devel@nongnu.org; Tue, 23 Feb 2021 09:28:24 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:32463) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lEYfm-0001pr-72 for qemu-devel@nongnu.org; Tue, 23 Feb 2021 09:28:23 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614090501; 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=9rhfEJwcbwKGlYfL6nuLnR+dZL+P+qS9iOWHwe+paXs=; b=Ai1fFgPca4o/NtyWMLn8Ni/nb46g5K+wYWEktf8nrm72lN3akjjg0KC/3TQtz97uutFECs gq88csSov2L4fX96AOgqVvFXp4wVIMXKKode4Kd+Wa06ALP0uIdb4ko5JkAFjkhP9++RFQ JmT3MfRWsCfhwdRt/hTYm8fbCjmUkFg= 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-5-XYdSYSW0OQWAknevNFGe9Q-1; Tue, 23 Feb 2021 09:27:46 -0500 X-MC-Unique: XYdSYSW0OQWAknevNFGe9Q-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2BA77186DD37; Tue, 23 Feb 2021 14:26:28 +0000 (UTC) Received: from localhost (unknown [10.40.208.64]) by smtp.corp.redhat.com (Postfix) with ESMTP id DD6DF6F131; Tue, 23 Feb 2021 14:26:21 +0000 (UTC) Date: Tue, 23 Feb 2021 15:26:20 +0100 From: Igor Mammedov To: isaku.yamahata@gmail.com Subject: Re: [PATCH v5 07/10] hw/i386: declare ACPI mother board resource for MMCONFIG region Message-ID: <20210223152620.2189f7f5@redhat.com> In-Reply-To: <6f686b45ce7bc43048c56dbb46e72e1fe51927e6.1613615732.git.isaku.yamahata@intel.com> References: <6f686b45ce7bc43048c56dbb46e72e1fe51927e6.1613615732.git.isaku.yamahata@intel.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=imammedo@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=imammedo@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_LOW=-0.7, RCVD_IN_MSPIKE_H3=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: isaku.yamahata@intel.com, qemu-devel@nongnu.org, mst@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Wed, 17 Feb 2021 21:51:15 -0800 isaku.yamahata@gmail.com wrote: > From: Isaku Yamahata > > Declare PNP0C01 device to reserve MMCONFIG region to conform to the > spec better and play nice with guest BIOSes/OSes. > > According to PCI Firmware Specification[0], MMCONFIG region must be > reserved by declaring a motherboard resource. It's optional to reserve > the region in memory map by Int 15 E820h or EFIGetMemoryMap. > Guest Linux checks if the MMCFG region is reserved by bios memory map > or ACPI resource. If it's not reserved, Linux falls back to legacy PCI > configuration access. > > TDVF [1] [2] doesn't reserve MMCONFIG the region in memory map. > On the other hand OVMF reserves it in memory map without declaring a > motherboard resource. With memory map reservation, linux guest uses > MMCONFIG region. However it doesn't comply to PCI Firmware > specification. > > [0] PCI Firmware specification Revision 3.2 > 4.1.2 MCFG Table Description table 4-2 NOTE 2 > If the operating system does not natively comprehend reserving the > MMCFG region, The MMCFG region must e reserved by firmware. ... > For most systems, the mortheroard resource would appear at the root > of the ACPI namespace (under \_SB)... > The resource can optionally be returned in Int15 E820h or > EFIGetMemoryMap as reserved memory but must always be reported > through ACPI as a motherboard resource > > [1] TDX: Intel Trust Domain Extension > https://software.intel.com/content/www/us/en/develop/articles/intel-trust-domain-extensions.html > [2] TDX Virtual Firmware > https://github.com/tianocore/edk2-staging/tree/TDVF > > The change to DSDT is as follows. > @@ -68,32 +68,47 @@ > > If ((CDW3 != Local0)) > { > CDW1 |= 0x10 > } > > CDW3 = Local0 > } > Else > { > CDW1 |= 0x04 > } > > Return (Arg3) > } > } > + > + Device (DRAC) > + { > + Name (_HID, "PNP0C01" /* System Board */) // _HID: Hardware ID > + Name (_CRS, ResourceTemplate () // _CRS: Current Resource Settings > + { > + DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed, NonCacheable, ReadWrite, > + 0x00000000, // Granularity > + 0xB0000000, // Range Minimum > + 0xBFFFFFFF, // Range Maximum > + 0x00000000, // Translation Offset > + 0x10000000, // Length > + ,, , AddressRangeMemory, TypeStatic) > + }) > + } > } > > Scope (_SB) > { > Device (HPET) > { > Name (_HID, EisaId ("PNP0103") /* HPET System Timer */) // _HID: Hardware ID > Name (_UID, Zero) // _UID: Unique ID > OperationRegion (HPTM, SystemMemory, 0xFED00000, 0x0400) > Field (HPTM, DWordAcc, Lock, Preserve) > { > VEND, 32, > PRD, 32 > } > > Method (_STA, 0, NotSerialized) // _STA: Status > > Signed-off-by: Isaku Yamahata Reviewed-by: Igor Mammedov > --- > hw/i386/acpi-build.c | 46 +++++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 45 insertions(+), 1 deletion(-) > > diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c > index 49aef4ebd1..96497475d1 100644 > --- a/hw/i386/acpi-build.c > +++ b/hw/i386/acpi-build.c > @@ -1072,6 +1072,46 @@ static void build_q35_pci0_int(Aml *table) > aml_append(table, sb_scope); > } > > +static Aml *build_q35_dram_controller(const AcpiMcfgInfo *mcfg) > +{ > + Aml *dev; > + Aml *resource_template; > + > + /* DRAM controller */ > + dev = aml_device("DRAC"); > + aml_append(dev, aml_name_decl("_HID", aml_string("PNP0C01"))); > + > + resource_template = aml_resource_template(); > + if (mcfg->base + mcfg->size - 1 >= (1ULL << 32)) { > + aml_append(resource_template, > + aml_qword_memory(AML_POS_DECODE, > + AML_MIN_FIXED, > + AML_MAX_FIXED, > + AML_NON_CACHEABLE, > + AML_READ_WRITE, > + 0x0000000000000000, > + mcfg->base, > + mcfg->base + mcfg->size - 1, > + 0x0000000000000000, > + mcfg->size)); > + } else { > + aml_append(resource_template, > + aml_dword_memory(AML_POS_DECODE, > + AML_MIN_FIXED, > + AML_MAX_FIXED, > + AML_NON_CACHEABLE, > + AML_READ_WRITE, > + 0x0000000000000000, > + mcfg->base, > + mcfg->base + mcfg->size - 1, > + 0x0000000000000000, > + mcfg->size)); > + } > + aml_append(dev, aml_name_decl("_CRS", resource_template)); > + > + return dev; > +} > + > static void build_q35_isa_bridge(Aml *table) > { > Aml *dev; > @@ -1218,6 +1258,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, > PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(machine); > X86MachineState *x86ms = X86_MACHINE(machine); > AcpiMcfgInfo mcfg; > + bool mcfg_valid = !!acpi_get_mcfg(&mcfg); > uint32_t nr_mem = machine->ram_slots; > int root_bus_limit = 0xFF; > PCIBus *bus = NULL; > @@ -1256,6 +1297,9 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, > aml_append(dev, aml_name_decl("_UID", aml_int(0))); > aml_append(dev, build_q35_osc_method()); > aml_append(sb_scope, dev); > + if (mcfg_valid) { > + aml_append(sb_scope, build_q35_dram_controller(&mcfg)); > + } > > if (pm->smi_on_cpuhp) { > /* reserve SMI block resources, IO ports 0xB2, 0xB3 */ > @@ -1386,7 +1430,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, > * the PCI0._CRS. Add mmconfig to the set so it will be excluded > * too. > */ > - if (acpi_get_mcfg(&mcfg)) { > + if (mcfg_valid) { > crs_range_insert(crs_range_set.mem_ranges, > mcfg.base, mcfg.base + mcfg.size - 1); > }