Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753069Ab3GIUYK (ORCPT ); Tue, 9 Jul 2013 16:24:10 -0400 Received: from mail-pa0-f44.google.com ([209.85.220.44]:65234 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752551Ab3GIUYH (ORCPT ); Tue, 9 Jul 2013 16:24:07 -0400 Date: Tue, 9 Jul 2013 13:24:06 -0700 From: Guenter Roeck To: linux-kernel@vger.kernel.org Subject: WARNING: at drivers/iommu/dmar.c:484 warn_invalid_dmar with Intel Motherboard Message-ID: <20130709202406.GA11867@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 Content-Length: 2187 Lines: 42 I started seeing this problem after updating the BIOS trying fix another issue, though I may have missed it earlier. I understand this is a BIOS bug. Would be great if someone can pass this on to Intel BIOS engineers. CPU is i7-4770K. Guenter --- [ 0.000000] WARNING: at drivers/iommu/dmar.c:484 warn_invalid_dmar+0x86/0xa0() [ 0.000000] Your BIOS is broken; DMAR reported at address 0! [ 0.000000] BIOS vendor: Intel Corp.; Ver: RLH8710H.86A.0320.2013.0606.1802; Product Version: [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.10.0+ #1 [ 0.000000] Hardware name: /DH87RL, BIOS RLH8710H.86A.0320.2013.0606.1802 06/06/2013 [ 0.000000] 000000000000000b ffffffff81c01e20 ffffffff81671cfc ffffffff81c01e68 [ 0.000000] ffffffff81c01e58 ffffffff81043370 ffffffff81f6800c ffffffff81cbb520 [ 0.000000] 0000000000000000 ffff88061fdaad40 00000000c73cc018 ffffffff81c01eb8 [ 0.000000] Call Trace: [ 0.000000] [] dump_stack+0x45/0x56 [ 0.000000] [] warn_slowpath_common+0x70/0xa0 [ 0.000000] [] warn_slowpath_fmt_taint+0x44/0x50 [ 0.000000] [] ? early_ioremap+0x13/0x15 [ 0.000000] [] ? __acpi_map_table+0x13/0x1a [ 0.000000] [] warn_invalid_dmar+0x86/0xa0 [ 0.000000] [] check_zero_address+0x57/0xf7 [ 0.000000] [] detect_intel_iommu+0x15/0xb6 [ 0.000000] [] pci_iommu_alloc+0x49/0x70 [ 0.000000] [] mem_init+0x17/0x9c [ 0.000000] [] start_kernel+0x1c5/0x3e2 [ 0.000000] [] ? repair_env_string+0x5e/0x5e [ 0.000000] [] x86_64_start_reservations+0x2a/0x2c [ 0.000000] [] x86_64_start_kernel+0xf6/0xf9 [ 0.000000] ---[ end trace a7e3512e2fa85eaf ]--- -- 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/