Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756201Ab3JHRCg (ORCPT ); Tue, 8 Oct 2013 13:02:36 -0400 Received: from 8bytes.org ([85.214.48.195]:36584 "EHLO mail.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752390Ab3JHRCd (ORCPT ); Tue, 8 Oct 2013 13:02:33 -0400 Date: Tue, 8 Oct 2013 19:02:28 +0200 From: "joro@8bytes.org" To: Bjorn Helgaas Cc: Bhushan Bharat-R65777 , "alex.williamson@redhat.com" , "benh@kernel.crashing.org" , "galak@kernel.crashing.org" , "linux-kernel@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-pci@vger.kernel.org" , "agraf@suse.de" , Wood Scott-B07421 , "iommu@lists.linux-foundation.org" Subject: Re: [PATCH 1/7] powerpc: Add interface to get msi region information Message-ID: <20131008170228.GD17455@8bytes.org> References: <1379575763-2091-1-git-send-email-Bharat.Bhushan@freescale.com> <1379575763-2091-2-git-send-email-Bharat.Bhushan@freescale.com> <20130924235812.GD9302@google.com> <6A3DF150A5B70D4F9B66A25E3F7C888D0718FA58@039-SN2MPN1-011.039d.mgd.msft.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-DSPAM-Result: Whitelisted X-DSPAM-Processed: Tue Oct 8 19:02:31 2013 X-DSPAM-Confidence: 0.9995 X-DSPAM-Probability: 0.0000 X-DSPAM-Signature: 52543aa720867814516481 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 635 Lines: 18 On Tue, Oct 08, 2013 at 10:47:49AM -0600, Bjorn Helgaas wrote: > I still have no idea what an "aperture type IOMMU" is, > other than that it is "different." An aperture based IOMMU is basically any GART-like IOMMU which can only remap a small window (the aperture) of the DMA address space. DMA outside of that window is either blocked completly or passed through untranslated. Joerg -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/