From patchwork Tue Sep 26 09:26:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 726863 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64349E7D270 for ; Tue, 26 Sep 2023 09:27:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234246AbjIZJ12 (ORCPT ); Tue, 26 Sep 2023 05:27:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234211AbjIZJ1K (ORCPT ); Tue, 26 Sep 2023 05:27:10 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B4981A5; Tue, 26 Sep 2023 02:27:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695720423; x=1727256423; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=W+uOy9Ige3oZ7x7YvATxosVpM3ybZgqwu1X08uq0/aA=; b=NDA/NdD3Vq3FbsCuEyazLzy++mJXCJlaSYy21x9nuWXSLBxzl8h5sDPM HPsvliRH3FVdLUglPlLnQQpt3ZT41pQbN7yEusC/CkdQndgr5cPlVVdUo TQC1bIsocJf+LkY0Xdaknjfsf0Em1BNPFCdG2/Z9Dz+bmjCpRnUq9iBnS ypidLi5MxqrbzwerniN2dgtaU/lK6JgfzgwKpVva3C8gRgCPKsW1oHeoA 2JS+R9x/A6bQzWFN6RUzrEYbD7zZQlapFhnUUkeFCA/MCtXI3S8ODX/wS bybFOYWBHMSMEIJgxP3EdSE1+CZt80iaSID1o3zGs9xLYPgrzTVVOcoe7 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="360905440" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="360905440" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 02:27:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="1079642580" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="1079642580" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga005.fm.intel.com with ESMTP; 26 Sep 2023 02:27:02 -0700 From: Yi Liu To: joro@8bytes.org, alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com, robin.murphy@arm.com, baolu.lu@linux.intel.com Cc: cohuck@redhat.com, eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org, mjrosato@linux.ibm.com, chao.p.peng@linux.intel.com, yi.l.liu@intel.com, yi.y.sun@linux.intel.com, peterx@redhat.com, jasowang@redhat.com, shameerali.kolothum.thodi@huawei.com, lulu@redhat.com, suravee.suthikulpanit@amd.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, zhenzhong.duan@intel.com, joao.m.martins@oracle.com Subject: [RFC 8/8] iommu/vt-d: Add set_dev_pasid callback for nested domain Date: Tue, 26 Sep 2023 02:26:51 -0700 Message-Id: <20230926092651.17041-9-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230926092651.17041-1-yi.l.liu@intel.com> References: <20230926092651.17041-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Lu Baolu This allows the upper layers to set a nested type domain to a PASID of a device if the PASID feature is supported by the IOMMU hardware. Signed-off-by: Lu Baolu Signed-off-by: Yi Liu --- drivers/iommu/intel/nested.c | 47 ++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c index 4853fee216d9..dc99ea1abf68 100644 --- a/drivers/iommu/intel/nested.c +++ b/drivers/iommu/intel/nested.c @@ -63,6 +63,52 @@ static int intel_nested_attach_dev(struct iommu_domain *domain, return 0; } +static int intel_nested_set_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid) +{ + struct device_domain_info *info = dev_iommu_priv_get(dev); + struct dmar_domain *dmar_domain = to_dmar_domain(domain); + struct intel_iommu *iommu = info->iommu; + struct dev_pasid_info *dev_pasid; + unsigned long flags; + int ret = 0; + + if (!pasid_supported(iommu)) + return -EOPNOTSUPP; + + if (iommu->agaw < dmar_domain->s2_domain->agaw) + return -EINVAL; + + ret = prepare_domain_attach_device(&dmar_domain->s2_domain->domain, dev); + if (ret) + return ret; + + dev_pasid = kzalloc(sizeof(*dev_pasid), GFP_KERNEL); + if (!dev_pasid) + return -ENOMEM; + + ret = domain_attach_iommu(dmar_domain, iommu); + if (ret) + goto err_free; + + ret = intel_pasid_setup_nested(iommu, dev, pasid, dmar_domain); + if (ret) + goto err_detach_iommu; + + dev_pasid->dev = dev; + dev_pasid->pasid = pasid; + spin_lock_irqsave(&dmar_domain->lock, flags); + list_add(&dev_pasid->link_domain, &dmar_domain->dev_pasids); + spin_unlock_irqrestore(&dmar_domain->lock, flags); + + return 0; +err_detach_iommu: + domain_detach_iommu(dmar_domain, iommu); +err_free: + kfree(dev_pasid); + return ret; +} + static void intel_nested_domain_free(struct iommu_domain *domain) { kfree(to_dmar_domain(domain)); @@ -127,6 +173,7 @@ static int intel_nested_cache_invalidate_user(struct iommu_domain *domain, static const struct iommu_domain_ops intel_nested_domain_ops = { .attach_dev = intel_nested_attach_dev, + .set_dev_pasid = intel_nested_set_dev_pasid, .free = intel_nested_domain_free, .cache_invalidate_user = intel_nested_cache_invalidate_user, };