From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933522AbZIDJnZ (ORCPT ); Fri, 4 Sep 2009 05:43:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933496AbZIDJmR (ORCPT ); Fri, 4 Sep 2009 05:42:17 -0400 Received: from va3ehsobe005.messaging.microsoft.com ([216.32.180.15]:12855 "EHLO VA3EHSOBE005.bigfish.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933461AbZIDJmD (ORCPT ); Fri, 4 Sep 2009 05:42:03 -0400 X-SpamScore: 3 X-BigFish: VPS3(zzzz1202hzzz32i203h43j64h) X-Spam-TCS-SCL: 3:0 X-WSS-ID: 0KPFXLW-03-O1M-01 From: Joerg Roedel To: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org CC: Joerg Roedel Subject: [PATCH 11/14] x86/amd-iommu: Use 2-level page tables for dma_ops domains Date: Fri, 4 Sep 2009 11:40:49 +0200 Message-ID: <1252057252-32074-12-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1252057252-32074-1-git-send-email-joerg.roedel@amd.com> References: <1252057252-32074-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 04 Sep 2009 09:40:55.0595 (UTC) FILETIME=[CCD377B0:01CA2D43] 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 The driver now supports a dynamic number of levels for IO page tables. This allows to reduce the number of levels for dma_ops domains by one because a dma_ops domain has usually an address space size between 128MB and 4G. Signed-off-by: Joerg Roedel --- arch/x86/kernel/amd_iommu.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 6ffb3e6..addf658 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -1010,7 +1010,7 @@ static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu) dma_dom->domain.id = domain_id_alloc(); if (dma_dom->domain.id == 0) goto free_dma_dom; - dma_dom->domain.mode = PAGE_MODE_3_LEVEL; + dma_dom->domain.mode = PAGE_MODE_2_LEVEL; dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL); dma_dom->domain.flags = PD_DMA_OPS_MASK; dma_dom->domain.priv = dma_dom; -- 1.6.3.3