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=-13.0 required=3.0 tests=BAYES_00, 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 36E37C43446 for ; Tue, 28 Jul 2020 06:21:12 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 1349F20759 for ; Tue, 28 Jul 2020 06:21:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1349F20759 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=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 fraxinus.osuosl.org (Postfix) with ESMTP id E87D38698D; Tue, 28 Jul 2020 06:21:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Qz9b0uCjbRvi; Tue, 28 Jul 2020 06:21:08 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id C352B869C0; Tue, 28 Jul 2020 06:21:07 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id AFB7EC0733; Tue, 28 Jul 2020 06:21:07 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1EB46C004D for ; Tue, 28 Jul 2020 06:21:02 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 0C04E22812 for ; Tue, 28 Jul 2020 06:21:02 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SQ4NPJxbNIEp for ; Tue, 28 Jul 2020 06:20:59 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by silver.osuosl.org (Postfix) with ESMTPS id BA4D12288A for ; Tue, 28 Jul 2020 06:20:57 +0000 (UTC) IronPort-SDR: NsTXjDRomNz1jCDmM8WeK8TPzG5V3kVweTpxSIeQ0dLmOOxxegVTsuqGyrnSLFNkPzZ0xx0IiC sDflFtu+rmLA== X-IronPort-AV: E=McAfee;i="6000,8403,9695"; a="152411230" X-IronPort-AV: E=Sophos;i="5.75,405,1589266800"; d="scan'208,223";a="152411230" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jul 2020 23:20:56 -0700 IronPort-SDR: 4cVCN5VBZ8Ywyg/8l6Gb6KzD2R8Fz5M6RE6j04hF6QJvNMcEqMgdijHD1Lm4IDzMYQBWj/70rs 6dsHf2LRX3kA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,405,1589266800"; d="scan'208,223";a="320274397" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga008.jf.intel.com with ESMTP; 27 Jul 2020 23:20:55 -0700 From: Liu Yi L To: alex.williamson@redhat.com, eric.auger@redhat.com, baolu.lu@linux.intel.com, joro@8bytes.org Subject: [PATCH v6 06/15] iommu/vt-d: Support setting ioasid set to domain Date: Mon, 27 Jul 2020 23:27:35 -0700 Message-Id: <1595917664-33276-7-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1595917664-33276-1-git-send-email-yi.l.liu@intel.com> References: <1595917664-33276-1-git-send-email-yi.l.liu@intel.com> Cc: jean-philippe@linaro.org, kevin.tian@intel.com, ashok.raj@intel.com, kvm@vger.kernel.org, stefanha@gmail.com, jun.j.tian@intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, yi.y.sun@intel.com, hao.wu@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" >From IOMMU p.o.v., PASIDs allocated and managed by external components (e.g. VFIO) will be passed in for gpasid_bind/unbind operation. IOMMU needs some knowledge to check the PASID ownership, hence add an interface for those components to tell the PASID owner. In latest kernel design, PASID ownership is managed by IOASID set where the PASID is allocated from. This patch adds support for setting ioasid set ID to the domains used for nesting/vSVA. Subsequent SVA operations will check the PASID against its IOASID set for proper ownership. Cc: Kevin Tian CC: Jacob Pan Cc: Alex Williamson Cc: Eric Auger Cc: Jean-Philippe Brucker Cc: Joerg Roedel Cc: Lu Baolu Signed-off-by: Liu Yi L Signed-off-by: Jacob Pan --- v5 -> v6: *) address comments against v5 from Eric Auger. v4 -> v5: *) address comments from Eric Auger. --- drivers/iommu/intel/iommu.c | 23 +++++++++++++++++++++++ include/linux/intel-iommu.h | 4 ++++ include/linux/iommu.h | 1 + 3 files changed, 28 insertions(+) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index ed4b71c..b2fe54e 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -1793,6 +1793,7 @@ static struct dmar_domain *alloc_domain(int flags) if (first_level_by_default()) domain->flags |= DOMAIN_FLAG_USE_FIRST_LEVEL; domain->has_iotlb_device = false; + domain->ioasid_sid = INVALID_IOASID_SET; INIT_LIST_HEAD(&domain->devices); return domain; @@ -6040,6 +6041,28 @@ intel_iommu_domain_set_attr(struct iommu_domain *domain, } spin_unlock_irqrestore(&device_domain_lock, flags); break; + case DOMAIN_ATTR_IOASID_SID: + { + int sid = *(int *)data; + + spin_lock_irqsave(&device_domain_lock, flags); + if (!(dmar_domain->flags & DOMAIN_FLAG_NESTING_MODE)) { + ret = -ENODEV; + spin_unlock_irqrestore(&device_domain_lock, flags); + break; + } + if (dmar_domain->ioasid_sid != INVALID_IOASID_SET && + dmar_domain->ioasid_sid != sid) { + pr_warn_ratelimited("multi ioasid_set (%d:%d) setting", + dmar_domain->ioasid_sid, sid); + ret = -EBUSY; + spin_unlock_irqrestore(&device_domain_lock, flags); + break; + } + dmar_domain->ioasid_sid = sid; + spin_unlock_irqrestore(&device_domain_lock, flags); + break; + } default: ret = -EINVAL; break; diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 3f23c26..0d0ab32 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -549,6 +549,10 @@ struct dmar_domain { 2 == 1GiB, 3 == 512GiB, 4 == 1TiB */ u64 max_addr; /* maximum mapped address */ + int ioasid_sid; /* + * the ioasid set which tracks all + * PASIDs used by the domain. + */ int default_pasid; /* * The default pasid used for non-SVM * traffic on mediated devices. diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 4a02c9e..b1ff702 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -124,6 +124,7 @@ enum iommu_attr { DOMAIN_ATTR_FSL_PAMUV1, DOMAIN_ATTR_NESTING, /* two stages of translation */ DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, + DOMAIN_ATTR_IOASID_SID, DOMAIN_ATTR_MAX, }; -- 2.7.4 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu