Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755919Ab0F3UCR (ORCPT ); Wed, 30 Jun 2010 16:02:17 -0400 Received: from mga02.intel.com ([134.134.136.20]:39889 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755033Ab0F3UCQ (ORCPT ); Wed, 30 Jun 2010 16:02:16 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.53,514,1272870000"; d="scan'208";a="531906767" Subject: Re: BUG in drivers/dma/ioat/dma_v2.c:314 From: David Woodhouse To: "Williams, Dan J" Cc: Chris Li , linux-kernel In-Reply-To: <4C2B9DAC.1030806@intel.com> References: <4C29420D.2010406@intel.com> <4C2A8879.8010000@intel.com> <4C2AC55E.3040303@intel.com> <1277923422.16256.8.camel@localhost> <4C2B9DAC.1030806@intel.com> Content-Type: text/plain; charset="UTF-8" Organization: Intel Corporation Date: Wed, 30 Jun 2010 21:02:05 +0100 Message-ID: <1277928125.18854.0.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.31.4 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1081 Lines: 25 On Wed, 2010-06-30 at 20:40 +0100, Williams, Dan J wrote: > From the dmesg: > > IOMMU 0: reg_base_addr fe710000 ver 1:0 cap 900000c2f0462 ecap e01 > > DMAR: DRHD base: 0x000000fe714000 flags: 0x0 > > IOMMU 1: reg_base_addr fe714000 ver 1:0 cap 900000c2f0462 ecap e01 > > DMAR: DRHD base: 0x000000fe719000 flags: 0x0 > > IOMMU 2: reg_base_addr fe719000 ver 1:0 cap 900000c2f0462 ecap e01 > > DMAR: DRHD base: 0x000000fe718000 flags: 0x1 > > IOMMU 3: reg_base_addr fe718000 ver 1:0 cap 900000c2f0462 ecap e01 > > Where we expect bit 54 to be set for the DMA iommu, and it does not > appear to show up. So the BIOS is lying to us about which PCI devices are attached to which IOMMU? -- David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation -- 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/