Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755867AbYGCRf7 (ORCPT ); Thu, 3 Jul 2008 13:35:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755208AbYGCRff (ORCPT ); Thu, 3 Jul 2008 13:35:35 -0400 Received: from outbound-va3.frontbridge.com ([216.32.180.16]:18195 "EHLO VA3EHSOBE005.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755195AbYGCRfd (ORCPT ); Thu, 3 Jul 2008 13:35:33 -0400 X-BigFish: VPS4(zzzz10d3izzz32i43j65h) X-Spam-TCS-SCL: 4:0 X-WSS-ID: 0K3FY6L-03-NV9-01 From: Joerg Roedel To: mingo@redhat.com, tglx@linutronix.de CC: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, bhavna.sarathy@amd.com, robert.richter@amd.com, Joerg Roedel Subject: [PATCH 1/6] AMD IOMMU: more verbose Kconfig description text Date: Thu, 3 Jul 2008 19:35:06 +0200 Message-ID: <1215106511-12915-2-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.5.3.7 In-Reply-To: <1215106511-12915-1-git-send-email-joerg.roedel@amd.com> References: <1215106511-12915-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 03 Jul 2008 17:35:12.0085 (UTC) FILETIME=[256A4050:01C8DD33] MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1358 Lines: 38 This patch replaces the short description text for AMD IOMMU in Kconfig with a more verbose one. Signed-off-by: Joerg Roedel --- arch/x86/Kconfig | 10 +++++++++- 1 files changed, 9 insertions(+), 1 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index dc6425e..c31047a 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -568,7 +568,15 @@ config AMD_IOMMU select SWIOTLB depends on X86_64 && PCI && ACPI help - Select this to get support for AMD IOMMU hardware in your system. + With this option you can enable support for AMD IOMMU hardware in + your system. An IOMMU is a hardware component which provides + remapping of DMA memory accesses from devices. With an AMD IOMMU you + can isolate the the DMA memory of different devices and protect the + system from misbehaving device drivers or hardware. + + You can find out if your system has an AMD IOMMU if you look into + your BIOS for an option to enable it or if you have an IVRS ACPI + table. # need this always selected by IOMMU for the VIA workaround config SWIOTLB -- 1.5.3.7 -- 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/