From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941851AbcLVXpO (ORCPT ); Thu, 22 Dec 2016 18:45:14 -0500 Received: from mga01.intel.com ([192.55.52.88]:60290 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752905AbcLVXpM (ORCPT ); Thu, 22 Dec 2016 18:45:12 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,391,1477983600"; d="scan'208";a="21871512" Date: Thu, 22 Dec 2016 15:45:08 -0800 From: "Raj, Ashok" To: Bjorn Helgaas Cc: Joerg Roedel , linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org, David Woodhouse , linux-kernel@vger.kernel.org, rwright@hpe.com, ashok.raj@intel.com Subject: Re: possible dmar_init_reserved_ranges() error Message-ID: <20161222234508.GA20924@otc-nc-03> References: <20161219212044.GA21774@bhelgaas-glaptop.roam.corp.google.com> <20161222162713.GF17255@8bytes.org> <20161222202803.GA16855@bhelgaas-glaptop.roam.corp.google.com> <20161222233238.GA20861@otc-nc-03> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20161222233238.GA20861@otc-nc-03> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Bjorn None in the platform group say they know about this. So i'm fairly sure we don't do that on Intel hardware (x86). I'm not sure about the usage, it appears maybe it was a hack pre-virtualization for some direct access? (just wild guessing) On Thu, Dec 22, 2016 at 03:32:38PM -0800, Raj, Ashok wrote: > Let me check and keep you posted if we have such platforms to make sure if > we need this considerations for _TRA. Cheers, Ashok