From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760346AbYLDRn3 (ORCPT ); Thu, 4 Dec 2008 12:43:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757513AbYLDRc6 (ORCPT ); Thu, 4 Dec 2008 12:32:58 -0500 Received: from outbound-sin.frontbridge.com ([207.46.51.80]:16833 "EHLO SG2EHSOBE006.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757756AbYLDRcp (ORCPT ); Thu, 4 Dec 2008 12:32:45 -0500 X-BigFish: VPS3(zzzzzzz32i43j66h) X-Spam-TCS-SCL: 5:0 X-WSS-ID: 0KBD4PD-03-CXG-01 From: Joerg Roedel To: avi@redhat.com, mingo@redhat.com, dwmw2@infradead.org, gregkh@suse.de, weidong.han@intel.com CC: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Joerg Roedel Subject: [PATCH 18/19] AMD IOMMU: add domain address lookup function for IOMMU API Date: Thu, 4 Dec 2008 18:31:55 +0100 Message-ID: <1228411916-22668-19-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.5.6.4 In-Reply-To: <20081204172142.GH12816@amd.com> References: <20081204172142.GH12816@amd.com> X-OriginalArrivalTime: 04 Dec 2008 17:31:57.0480 (UTC) FILETIME=[35096280:01C95636] 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 Impact: add a generic function to lockup addresses in protection domains Signed-off-by: Joerg Roedel --- arch/x86/kernel/amd_iommu.c | 31 +++++++++++++++++++++++++++++++ 1 files changed, 31 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 6898d10..57e636e 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -1682,3 +1682,34 @@ static void amd_iommu_unmap_range(struct iommu_domain *dom, iommu_flush_domain(domain->id); } + +static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, + unsigned long iova) +{ + struct protection_domain *domain = dom->priv; + unsigned long offset = iova & ~PAGE_MASK; + phys_addr_t paddr; + u64 *pte; + + pte = &domain->pt_root[IOMMU_PTE_L2_INDEX(iova)]; + + if (!IOMMU_PTE_PRESENT(*pte)) + return 0; + + pte = IOMMU_PTE_PAGE(*pte); + pte = &pte[IOMMU_PTE_L1_INDEX(iova)]; + + if (!IOMMU_PTE_PRESENT(*pte)) + return 0; + + pte = IOMMU_PTE_PAGE(*pte); + pte = &pte[IOMMU_PTE_L0_INDEX(iova)]; + + if (!IOMMU_PTE_PRESENT(*pte)) + return 0; + + paddr = *pte & IOMMU_PAGE_MASK; + paddr |= offset; + + return paddr; +} -- 1.5.6.4