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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 4FE5AC47404 for ; Fri, 11 Oct 2019 08:08:05 +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 1FD372190F for ; Fri, 11 Oct 2019 08:08:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1FD372190F 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]:47014 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIpy0-0007T8-An for qemu-devel@archiver.kernel.org; Fri, 11 Oct 2019 04:08:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40019) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIpxG-0006qF-VV for qemu-devel@nongnu.org; Fri, 11 Oct 2019 04:07:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIpxF-0000Je-SR for qemu-devel@nongnu.org; Fri, 11 Oct 2019 04:07:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38910) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIpxF-0000IE-MU for qemu-devel@nongnu.org; Fri, 11 Oct 2019 04:07:17 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 309BD8E582; Fri, 11 Oct 2019 08:07:14 +0000 (UTC) Received: from lacos-laptop-7.usersys.redhat.com (ovpn-120-177.rdu2.redhat.com [10.10.120.177]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8FABF60BE1; Fri, 11 Oct 2019 08:07:04 +0000 (UTC) Subject: Re: [RFC 3/3] acpi: cpuhp: add CPHP_GET_CPU_ID_CMD command To: Eduardo Habkost , "Michael S. Tsirkin" References: <20191009132252.17860-1-imammedo@redhat.com> <20191009132252.17860-4-imammedo@redhat.com> <802d0d69-d478-76f5-2bd6-5ad2f1ac4474@redhat.com> <20191010110533-mutt-send-email-mst@kernel.org> <20191010192649.GF4084@habkost.net> From: Laszlo Ersek Message-ID: <91fa8359-d3f7-a28e-f8ce-e08637dea429@redhat.com> Date: Fri, 11 Oct 2019 10:07:03 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20191010192649.GF4084@habkost.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 11 Oct 2019 08:07:14 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 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: qemu-devel@nongnu.org, Gerd Hoffmann , Paolo Bonzini , Igor Mammedov , =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 10/10/19 21:26, Eduardo Habkost wrote: > Topology info is already available on CPUID. Independently of everything else, thanks for pointing this out. The edk2 library called "LocalApicLib" has two relevant functions: > /** > Get Package ID/Core ID/Thread ID of a processor. > > The algorithm assumes the target system has symmetry across physical > package boundaries with respect to the number of logical processors > per package, number of cores per package. > > @param[in] InitialApicId Initial APIC ID of the target logical processor. > @param[out] Package Returns the processor package ID. > @param[out] Core Returns the processor core ID. > @param[out] Thread Returns the processor thread ID. > **/ > VOID > EFIAPI > GetProcessorLocationByApicId ( > IN UINT32 InitialApicId, > OUT UINT32 *Package OPTIONAL, > OUT UINT32 *Core OPTIONAL, > OUT UINT32 *Thread OPTIONAL > ); > > /** > Get Package ID/Module ID/Tile ID/Die ID/Core ID/Thread ID of a processor. > > The algorithm assumes the target system has symmetry across physical > package boundaries with respect to the number of threads per core, number of > cores per module, number of modules per tile, number of tiles per die, number > of dies per package. > > @param[in] InitialApicId Initial APIC ID of the target logical processor. > @param[out] Package Returns the processor package ID. > @param[out] Die Returns the processor die ID. > @param[out] Tile Returns the processor tile ID. > @param[out] Module Returns the processor module ID. > @param[out] Core Returns the processor core ID. > @param[out] Thread Returns the processor thread ID. > **/ > VOID > EFIAPI > GetProcessorLocation2ByApicId ( > IN UINT32 InitialApicId, > OUT UINT32 *Package OPTIONAL, > OUT UINT32 *Die OPTIONAL, > OUT UINT32 *Tile OPTIONAL, > OUT UINT32 *Module OPTIONAL, > OUT UINT32 *Core OPTIONAL, > OUT UINT32 *Thread OPTIONAL > ); They are implemented with heavy CPUID usage. So... just give me the APIC-ID. That's the primary key in edk2 for identifying x86 processors. Thanks Laszlo