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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9549AC433F5 for ; Sun, 20 Mar 2022 06:43:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244849AbiCTGoU (ORCPT ); Sun, 20 Mar 2022 02:44:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244840AbiCTGoP (ORCPT ); Sun, 20 Mar 2022 02:44:15 -0400 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68C62277 for ; Sat, 19 Mar 2022 23:42:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647758572; x=1679294572; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hqPz7OA71vKX+4SbCI7310Zl8v9/gzrRYRCnasL1ZjU=; b=Bjn9FF/yoAvthFUxPXbfvvotbuh+yEca7RS87LZSgOYiysRZoFhFetJT ZndGOlcJ49QRyZB+wstE4mkPYv0z9ZdpRQYBkO1HXMK5Rw96ZTvU8+Vch cY72haaq8Gk8/HlG/rnTPbXLQVPYp7Cst/t6P3JILqVHWN2A++d9bxGMY Ppuc5t83vfpqoWumJc0OgzfxzSMqN/C1XWH5wP21UYlsVUgZcvhu9mvnz B5yYU3RXdNvsWPKZeZvJ0ORFQYKAVt1kE0l1KscDyq2oUYGkeXz80fWWD m/QV+VxU1QfsI40Nkx80h86TR6keh3ipkOmu4E2JX4Tc7Ypn+dS19tIq7 g==; X-IronPort-AV: E=McAfee;i="6200,9189,10291"; a="254924019" X-IronPort-AV: E=Sophos;i="5.90,195,1643702400"; d="scan'208";a="254924019" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Mar 2022 23:42:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,195,1643702400"; d="scan'208";a="691839896" Received: from allen-box.sh.intel.com ([10.239.159.48]) by fmsmga001.fm.intel.com with ESMTP; 19 Mar 2022 23:42:48 -0700 From: Lu Baolu To: Joerg Roedel , Jason Gunthorpe , Christoph Hellwig , Kevin Tian , Ashok Raj , Will Deacon , Robin Murphy , Jean-Philippe Brucker Cc: Eric Auger , Liu Yi L , Jacob jun Pan , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Lu Baolu Subject: [PATCH RFC 04/11] iommu/vt-d: Add SVA domain support Date: Sun, 20 Mar 2022 14:40:23 +0800 Message-Id: <20220320064030.2936936-5-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220320064030.2936936-1-baolu.lu@linux.intel.com> References: <20220320064030.2936936-1-baolu.lu@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add support for SVA domain allocation and provide an SVA-specific iommu_domain_ops. Signed-off-by: Lu Baolu --- include/linux/intel-iommu.h | 1 + drivers/iommu/intel/iommu.c | 12 ++++++++++++ drivers/iommu/intel/svm.c | 34 ++++++++++++++++++++++++++++++++++ 3 files changed, 47 insertions(+) diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 2f9891cb3d00..c14283137fb5 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -744,6 +744,7 @@ void intel_svm_unbind(struct iommu_sva *handle); u32 intel_svm_get_pasid(struct iommu_sva *handle); int intel_svm_page_response(struct device *dev, struct iommu_fault_event *evt, struct iommu_page_response *msg); +extern const struct iommu_domain_ops intel_svm_domain_ops; struct intel_svm_dev { struct list_head list; diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index c1b91bce1530..d55dca3eacf8 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4318,6 +4318,18 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type) return domain; case IOMMU_DOMAIN_IDENTITY: return &si_domain->domain; +#ifdef CONFIG_INTEL_IOMMU_SVM + case IOMMU_DOMAIN_SVA: + dmar_domain = alloc_domain(type); + if (!dmar_domain) { + pr_err("Can't allocate sva domain\n"); + return NULL; + } + domain = &dmar_domain->domain; + domain->ops = &intel_svm_domain_ops; + + return domain; +#endif /* CONFIG_INTEL_IOMMU_SVM */ default: return NULL; } diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c index ee5ecde5b318..b9f4dd7057d1 100644 --- a/drivers/iommu/intel/svm.c +++ b/drivers/iommu/intel/svm.c @@ -932,3 +932,37 @@ int intel_svm_page_response(struct device *dev, mutex_unlock(&pasid_mutex); return ret; } + +static int intel_svm_attach_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid) +{ + struct device_domain_info *info = dev_iommu_priv_get(dev); + struct mm_struct *mm = domain->sva_cookie; + struct intel_iommu *iommu = info->iommu; + struct iommu_sva *sva; + + mutex_lock(&pasid_mutex); + sva = intel_svm_bind_mm(iommu, dev, mm); + mutex_unlock(&pasid_mutex); + + return IS_ERR_OR_NULL(sva); +} + +static void intel_svm_detach_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid) +{ + mutex_lock(&pasid_mutex); + intel_svm_unbind_mm(dev, pasid); + mutex_unlock(&pasid_mutex); +} + +static void intel_svm_domain_free(struct iommu_domain *domain) +{ + kfree(domain); +} + +const struct iommu_domain_ops intel_svm_domain_ops = { + .attach_dev_pasid = intel_svm_attach_dev_pasid, + .detach_dev_pasid = intel_svm_detach_dev_pasid, + .free = intel_svm_domain_free, +}; -- 2.25.1