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=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 E4B70CA9EB7 for ; Mon, 21 Oct 2019 13:38:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB91720679 for ; Mon, 21 Oct 2019 13:38:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729024AbfJUNiU (ORCPT ); Mon, 21 Oct 2019 09:38:20 -0400 Received: from mga01.intel.com ([192.55.52.88]:42893 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728812AbfJUNiU (ORCPT ); Mon, 21 Oct 2019 09:38:20 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Oct 2019 06:38:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,323,1566889200"; d="scan'208";a="209445645" Received: from lahna.fi.intel.com (HELO lahna) ([10.237.72.157]) by fmsmga001.fm.intel.com with SMTP; 21 Oct 2019 06:38:15 -0700 Received: by lahna (sSMTP sendmail emulation); Mon, 21 Oct 2019 16:38:14 +0300 Date: Mon, 21 Oct 2019 16:38:14 +0300 From: Mika Westerberg To: Stuart Hayes Cc: Bjorn Helgaas , Austin Bolen , keith.busch@intel.com, Alexandru Gagniuc , "Rafael J . Wysocki" , Andy Shevchenko , "Gustavo A . R . Silva" , Sinan Kaya , Oza Pawandeep , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, lukas@wunner.de Subject: Re: [PATCH v3 1/3] PCI: pciehp: Add support for disabling in-band presence Message-ID: <20191021133814.GJ2819@lahna.fi.intel.com> References: <20191017193256.3636-1-stuart.w.hayes@gmail.com> <20191017193256.3636-2-stuart.w.hayes@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191017193256.3636-2-stuart.w.hayes@gmail.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 17, 2019 at 03:32:54PM -0400, Stuart Hayes wrote: > From: Alexandru Gagniuc > > The presence detect state (PDS) is normally a logical or of in-band and > out-of-band presence. As of PCIe 4.0, there is the option to disable > in-band presence so that the PDS bit always reflects the state of the > out-of-band presence. > > The recommendation of the PCIe spec is to disable in-band presence > whenever supported. > > Signed-off-by: Alexandru Gagniuc Reviewed-by: Mika Westerberg