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 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 ACD6AC25B78 for ; Tue, 4 Jun 2024 13:59:46 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sEUhA-0005tb-Et; Tue, 04 Jun 2024 09:59:24 -0400 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 1sEUh7-0005qW-Tb for qemu-devel@nongnu.org; Tue, 04 Jun 2024 09:59:22 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sEUh5-0006bu-VR for qemu-devel@nongnu.org; Tue, 04 Jun 2024 09:59:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1717509558; 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: in-reply-to:in-reply-to:references:references; bh=KxZPYF87FmrxCwqmN5MY/xGLhuyludxMEYxLRtPB7bY=; b=DO9rql/yD26bQzcT7C5wOHxNDPvvIzsdz+WCoG9CKP72UjuwYyy4D6QkAX7TUnYltlssyR lDnE/jpTDZ8H40NOI7gM5mVyZG3TGg16W6yr5SvgGuw1Gv5/+P1GoZIBAALzdrEwjVMvmX NpzN6u2295LsvkzBvI0RMCrjZtnk9Ls= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-332-phpX-zSdM1aIZZsrf9LheA-1; Tue, 04 Jun 2024 09:59:12 -0400 X-MC-Unique: phpX-zSdM1aIZZsrf9LheA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 157A78007BA; Tue, 4 Jun 2024 13:59:12 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.39.192.93]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7EE3640D1B69; Tue, 4 Jun 2024 13:59:11 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id A0C8E21E6687; Tue, 4 Jun 2024 15:59:10 +0200 (CEST) From: Markus Armbruster To: Jonathan Cameron Cc: , , , , , Dave Jiang , Huang Ying , Paolo Bonzini , , , , , Michael Roth , Ani Sinha Subject: Re: [PATCH v2 3/6] hw/acpi: Generic Port Affinity Structure support In-Reply-To: <20240524100507.32106-4-Jonathan.Cameron@huawei.com> (Jonathan Cameron's message of "Fri, 24 May 2024 11:05:04 +0100") References: <20240524100507.32106-1-Jonathan.Cameron@huawei.com> <20240524100507.32106-4-Jonathan.Cameron@huawei.com> Date: Tue, 04 Jun 2024 15:59:10 +0200 Message-ID: <87zfs06c7l.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.2 Received-SPF: pass client-ip=170.10.133.124; envelope-from=armbru@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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 Jonathan Cameron writes: > These are very similar to the recently added Generic Initiators > but instead of representing an initiator of memory traffic they > represent an edge point beyond which may lie either targets or > initiators. Here we add these ports such that they may > be targets of hmat_lb records to describe the latency and > bandwidth from host side initiators to the port. A descoverable I figure your mean "discoverable", and ... > mechanism such as UEFI CDAT read from CXL devices and switches > is used to discover the remainder fo the path and the OS can build ... " of the path, and the OS". > up full latency and bandwidth numbers as need for work and data > placement decisions. > > Signed-off-by: Jonathan Cameron > --- > v2: Updates to QMP documentation to provide a lot more information > on the parameters. > --- > qapi/qom.json | 35 ++++++ > include/hw/acpi/acpi_generic_initiator.h | 18 ++- > include/hw/pci/pci_bridge.h | 1 + > hw/acpi/acpi_generic_initiator.c | 141 +++++++++++++++++------ > hw/pci-bridge/pci_expander_bridge.c | 1 - > 5 files changed, 158 insertions(+), 38 deletions(-) > > diff --git a/qapi/qom.json b/qapi/qom.json > index 38dde6d785..9d1d86bdad 100644 > --- a/qapi/qom.json > +++ b/qapi/qom.json > @@ -826,6 +826,39 @@ > 'data': { 'pci-dev': 'str', > 'node': 'uint32' } } > > + Extra blank line. > +## > +# @AcpiGenericPortProperties: > +# > +# Properties for acpi-generic-port objects. > +# > +# @pci-bus: QOM path of the PCI bus of the hostbridge associated with > +# this SRAT Generic Port Affinity Structure. This is the same as > +# the bus parameter for the root ports attached to this host bridge. > +# The resulting SRAT Generic Port Affinity Structure will refer to > +# the ACPI object in DSDT that represents the host bridge (e.g. > +# ACPI0016 for CXL host bridges.) See ACPI 6.5 Section 5.2.16.7 for I'd put the period behind the parenthesis: "bridges). See ACPI" > +# more information. > +# > +# @node: Similar to a NUMA node ID, but instead of providing a reference > +# point used for defining NUMA distances and access characteristics > +# to memory or from an initiator (e.g. CPU), this node defines the > +# boundary point between non-discoverable system buses which must be > +# described by firmware, and a discoverable bus. NUMA distances > +# and access characteristics are defined to and from that point. > +# For system software to establish full initiator to target > +# characteristics this information must be combined with information > +# retrieved from the discoverable part of the path. An example would > +# use CDAT (see UEFI.org) information read from devices and switches > +# in conjunction with link characteristics read from PCIe > +# Configuration space. Lines are slightly wide in places. Together: # @pci-bus: QOM path of the PCI bus of the hostbridge associated with # this SRAT Generic Port Affinity Structure. This is the same as # the bus parameter for the root ports attached to this host # bridge. The resulting SRAT Generic Port Affinity Structure will # refer to the ACPI object in DSDT that represents the host bridge # (e.g. ACPI0016 for CXL host bridges). See ACPI 6.5 Section # 5.2.16.7 for more information. # # @node: Similar to a NUMA node ID, but instead of providing a # reference point used for defining NUMA distances and access # characteristics to memory or from an initiator (e.g. CPU), this # node defines the boundary point between non-discoverable system # buses which must be described by firmware, and a discoverable # bus. NUMA distances and access characteristics are defined to # and from that point. For system software to establish full # initiator to target characteristics this information must be # combined with information retrieved from the discoverable part # of the path. An example would use CDAT (see UEFI.org) # information read from devices and switches in conjunction with # link characteristics read from PCIe Configuration space. > +# > +# Since: 9.1 > +## > +{ 'struct': 'AcpiGenericPortProperties', > + 'data': { 'pci-bus': 'str', > + 'node': 'uint32' } } > + > ## > # @RngProperties: > # > @@ -953,6 +986,7 @@ > { 'enum': 'ObjectType', > 'data': [ > 'acpi-generic-initiator', > + 'acpi-generic-port', > 'authz-list', > 'authz-listfile', > 'authz-pam', > @@ -1025,6 +1059,7 @@ > 'discriminator': 'qom-type', > 'data': { > 'acpi-generic-initiator': 'AcpiGenericInitiatorProperties', > + 'acpi-generic-port': 'AcpiGenericPortProperties', > 'authz-list': 'AuthZListProperties', > 'authz-listfile': 'AuthZListFileProperties', > 'authz-pam': 'AuthZPAMProperties', Preferably with these touch-ups Acked-by: Markus Armbruster [...]