From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E49E8C432C3 for ; Thu, 28 Nov 2019 02:30:03 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BFD5E2166E for ; Thu, 28 Nov 2019 02:30:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BFD5E2166E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 09C798113D; Thu, 28 Nov 2019 02:30:03 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YzVpQy37Z2RC; Thu, 28 Nov 2019 02:30:02 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 5F50A877DD; Thu, 28 Nov 2019 02:30:02 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 45105C1DD5; Thu, 28 Nov 2019 02:30:02 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id A559FC0881 for ; Thu, 28 Nov 2019 02:30:01 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 90C60877D3 for ; Thu, 28 Nov 2019 02:30:01 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EEC9fiEkQCCq for ; Thu, 28 Nov 2019 02:29:59 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by whitealder.osuosl.org (Postfix) with ESMTPS id 8B482877DD for ; Thu, 28 Nov 2019 02:29:59 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Nov 2019 18:29:59 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,251,1571727600"; d="scan'208";a="221176111" Received: from allen-box.sh.intel.com ([10.239.159.136]) by orsmga002.jf.intel.com with ESMTP; 27 Nov 2019 18:29:57 -0800 From: Lu Baolu To: Joerg Roedel , David Woodhouse , Alex Williamson Subject: [PATCH v2 1/8] iommu/vt-d: Add per domain page table ops Date: Thu, 28 Nov 2019 10:25:43 +0800 Message-Id: <20191128022550.9832-2-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191128022550.9832-1-baolu.lu@linux.intel.com> References: <20191128022550.9832-1-baolu.lu@linux.intel.com> Cc: kevin.tian@intel.com, ashok.raj@intel.com, kvm@vger.kernel.org, sanjay.k.kumar@intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, yi.y.sun@intel.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" The Intel VT-d in scalable mode supports two types of page talbes for DMA translation: the first level page table and the second level page table. The IOMMU driver is able to choose one of them for DMA remapping according to the use case. The first level page table uses the same format as the CPU page table, while the second level page table keeps compatible with previous formats. This abstracts the page tables used in Intel IOMMU driver by defining a per domain page table ops structure which contains callbacks for various page table operations. Signed-off-by: Lu Baolu --- include/linux/intel-iommu.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 326146a36dbf..e8bfe7466ebb 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -499,6 +499,28 @@ struct context_entry { u64 hi; }; +struct dmar_domain; + +/* + * struct pgtable_ops - page table ops + * @map_range: map a physically contiguous memory region to iova + * @unmap_range: unmap a physically contiguous memory region + * @iova_to_phys: return the physical address mapped to @iova + * @flush_tlb_range: flush the tlb caches as the result of map or unmap + */ +struct pgtable_ops { + int (*map_range)(struct dmar_domain *domain, + unsigned long iova, phys_addr_t paddr, + size_t size, int prot); + struct page *(*unmap_range)(struct dmar_domain *domain, + unsigned long iova, size_t size); + phys_addr_t (*iova_to_phys)(struct dmar_domain *domain, + unsigned long iova); + void (*flush_tlb_range)(struct dmar_domain *domain, + struct intel_iommu *iommu, + unsigned long iova, size_t size, bool ih); +}; + struct dmar_domain { int nid; /* node id */ @@ -517,8 +539,10 @@ struct dmar_domain { struct list_head auxd; /* link to device's auxiliary list */ struct iova_domain iovad; /* iova's that belong to this domain */ + /* page table used by this domain */ struct dma_pte *pgd; /* virtual address */ int gaw; /* max guest address width */ + const struct pgtable_ops *ops; /* page table ops */ /* adjusted guest address width, 0 is level 2 30-bit */ int agaw; -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu