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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 63DD2CA9EA0 for ; Mon, 28 Oct 2019 06:26:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 319C920659 for ; Mon, 28 Oct 2019 06:26:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="lGyIjhdc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731827AbfJ1G02 (ORCPT ); Mon, 28 Oct 2019 02:26:28 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:38050 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728348AbfJ1G02 (ORCPT ); Mon, 28 Oct 2019 02:26:28 -0400 Received: by mail-wm1-f68.google.com with SMTP id 22so7660706wms.3 for ; Sun, 27 Oct 2019 23:26:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=5l+qsX7WECe81v1d1Mcoy8+QeEHbXdZNkAOza7rbPmc=; b=lGyIjhdcFCLnL2EhVsQ3dISpevn1p9ZHN7r8c32E2zpBfOYaBuPO05xekplekmxwDO t4aL75beOiLLbprHtYFmOy8XGAVsdnVghhCykf2z8MhE7cTrPAOV73D9teVxAGdGM4ea 5muFcE0cfv/mf1AUvhYu6ju9IBXGLNggHLSBvTcnZpgovCPk0mdBM3Cdb28euevSc/ZB pHfSu1+8lO1qBwEXYSH90/4d1Pew3U+/OF2/x7L1b2bKYHsvvnTGnNChQISBnZrp6EyK qAHA2umrl8+XVuutb6xX+9Tq+q8E2Dn0YX8ktZCgFwCLHQGp4AS9wAWw8Ucha49enw7Z jkpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=5l+qsX7WECe81v1d1Mcoy8+QeEHbXdZNkAOza7rbPmc=; b=Q4Abaj88SvT91G4+CJ+dALgH6OWqdZsto0ffP6dTMnuH8zH4L50iL7lTb1fbiHg1wF FdXabGx1Ozc0RDPYXFAFIDxQ3KrLvp5sgf/xvNObqVh+5CD13WKOsYzjAA6kKhwJ+6rE heA9HOG02e5my4Xgp2pH5Cv8NxlYxb2rbFF5dUsp1QxzWHxiOAHduW2o6ZfA2fMZjRPw hjKbfSH+u/9JIv2t/NW94rbaI27MeMd8D+6sTkuYmBK8SZKyMDzPhP56Cw2FdgqyvlB8 ChnRW+xrMQIguKol377opwFdMP0JqGw7szl9K7fK8rOW6eSHQIz0xLzADU6tWlxigIbr ZC0Q== X-Gm-Message-State: APjAAAVgPuryEB6AWrVjxTWkAQsfclJRVsXuOzAEaFmAnRwIUSoDgzIt LRkER2IZV+XYlzWJ567Fht27gwEU X-Google-Smtp-Source: APXvYqxHW3gKY8kDXgEpF1N1IlM0cU3mUtYBfmbZkro1clP4bq2jMk0nAZK5sfYzJHoaJXP5gE+SKg== X-Received: by 2002:a1c:e40b:: with SMTP id b11mr14042278wmh.152.1572243986313; Sun, 27 Oct 2019 23:26:26 -0700 (PDT) Received: from ?IPv6:2003:ea:8f17:6e00:295c:195c:28c1:8e78? (p200300EA8F176E00295C195C28C18E78.dip0.t-ipconnect.de. [2003:ea:8f17:6e00:295c:195c:28c1:8e78]) by smtp.googlemail.com with ESMTPSA id a5sm10033172wrm.78.2019.10.27.23.26.25 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 27 Oct 2019 23:26:25 -0700 (PDT) Subject: Re: Drop Kconfig option PCIEASPM? To: Vidya Sagar , Bjorn Helgaas Cc: "linux-pci@vger.kernel.org" References: <1f784101-fe7a-becf-d855-ddc6d03a3f92@gmail.com> From: Heiner Kallweit Message-ID: <4f1ed14f-ccfa-6f0b-ea52-c826797e24dd@gmail.com> Date: Mon, 28 Oct 2019 07:26:16 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On 28.10.2019 06:41, Vidya Sagar wrote: > On 10/26/2019 3:12 AM, Heiner Kallweit wrote: >> I wonder whether anybody actually wants to disable ASPM support. >> In an old Kconfig commit message is mentioned that it may help >> to reduce kernel size of embedded systems. However I would >> think that on embedded systems ASPM is quite useful as it >> saves significant power and may result in a lower system >> temperature therefore. >> W/o ASPM support we have to live with devices coming up >> in whatever mode boot loader or firmware configure. >> >> Heiner >> > It means that we can still have an option to specify one of > PCIEASPM_DEFAULT/PERFORMANCE/POWERSAVE/POWER_SUPERSAVE configs right? > Yes, these config options would remain. PCIEASPM has a dependency on PCIEPORTBUS, so the idea would be to build ASPM support whenever PCIEPORTBUS is defined. > Vidya Sagar > Heiner