From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753589AbbHCOad (ORCPT ); Mon, 3 Aug 2015 10:30:33 -0400 Received: from 8bytes.org ([81.169.241.247]:53816 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752968AbbHCOab (ORCPT ); Mon, 3 Aug 2015 10:30:31 -0400 Date: Mon, 3 Aug 2015 16:30:29 +0200 From: Joerg Roedel To: Alex Williamson Cc: iommu@lists.linux-foundation.org, dwmw2@infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] iommu/vt-d: Report superpage support in sysfs Message-ID: <20150803143029.GD20968@8bytes.org> References: <20150714211624.11515.25204.stgit@gimli.home> <20150714212459.11515.71211.stgit@gimli.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150714212459.11515.71211.stgit@gimli.home> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 14, 2015 at 03:25:04PM -0600, Alex Williamson wrote: > We already have the VT-d capability register printed raw, but it > typically involves a trip to the code or the spec to figure out > whether superpages are supported. Make this easier with "2M_pages" > and "1G_pages" sysfs entries that clearly report Y/N. > > Signed-off-by: Alex Williamson > --- > drivers/iommu/intel-iommu.c | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) Can we make this a generic entry for all iommu types and export a pagesize bitmap instead? Joerg