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 smtp4.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 smtp.lore.kernel.org (Postfix) with ESMTPS id D5753C433EF for ; Sun, 20 Mar 2022 06:42:59 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 89D4E40905; Sun, 20 Mar 2022 06:42:59 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ms2MrQYwNQhR; Sun, 20 Mar 2022 06:42:58 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp4.osuosl.org (Postfix) with ESMTPS id 47E1340900; Sun, 20 Mar 2022 06:42:58 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 283EAC001A; Sun, 20 Mar 2022 06:42:58 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [IPv6:2605:bc80:3010::137]) by lists.linuxfoundation.org (Postfix) with ESMTP id C0A02C000B for ; Sun, 20 Mar 2022 06:42:56 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id B055240906 for ; Sun, 20 Mar 2022 06:42:56 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TmtXiJsh9b9x for ; Sun, 20 Mar 2022 06:42:56 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by smtp4.osuosl.org (Postfix) with ESMTPS id 18B1440905 for ; Sun, 20 Mar 2022 06:42:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647758576; x=1679294576; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DzrJvAObEWfBR46EFwvE37+RQ975CC6Vsc2tbNZ86Qs=; b=jjciCk36sXt5KMiP3DO+iA1udbHUwsDqJhLqwTytykuH4Xt5gqg4J4uZ qfxYh2r7l5wPKG2me6CXjG+q5jdYjQj1nGdIL1/Z8IreQRDFLhvk4l3ce hBSWyHz0cB64R8BqdNMkNHlzZir1fUQ2f52Bb12XyR+cKQMjybxc8mx2E Mko8DnUqAUwbiq7J1Kyr+fsyQox+U3zUqF+xqLBTbzifwzWONSXCUse66 HxSHtaDEMbpPTqlaL+TgYzivj7gnsWOt83YNo0gN+LtEQ9BCNtT56q3Lu fvQfExXK5m2JOhGQWt3vEeU8fbq0UyKy/pCnIMUp/3NWZBeSHmWJ7Rkj9 Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10291"; a="237961406" X-IronPort-AV: E=Sophos;i="5.90,195,1643702400"; d="scan'208";a="237961406" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Mar 2022 23:42:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,195,1643702400"; d="scan'208";a="691839914" Received: from allen-box.sh.intel.com ([10.239.159.48]) by fmsmga001.fm.intel.com with ESMTP; 19 Mar 2022 23:42:52 -0700 From: Lu Baolu To: Joerg Roedel , Jason Gunthorpe , Christoph Hellwig , Kevin Tian , Ashok Raj , Will Deacon , Robin Murphy , Jean-Philippe Brucker Subject: [PATCH RFC 05/11] arm-smmu-v3/sva: Add SVA domain support Date: Sun, 20 Mar 2022 14:40:24 +0800 Message-Id: <20220320064030.2936936-6-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 Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Jacob jun Pan 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Add support for SVA domain allocation and provide an SVA-specific iommu_domain_ops. Signed-off-by: Lu Baolu --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 14 ++++++ .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 45 +++++++++++++++++++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 13 +++++- 3 files changed, 71 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h index cd48590ada30..7631c00fdcbd 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -759,6 +759,10 @@ struct iommu_sva *arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm, void arm_smmu_sva_unbind(struct iommu_sva *handle); u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle); void arm_smmu_sva_notifier_synchronize(void); +int arm_smmu_sva_attach_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t id); +void arm_smmu_sva_detach_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t id); #else /* CONFIG_ARM_SMMU_V3_SVA */ static inline bool arm_smmu_sva_supported(struct arm_smmu_device *smmu) { @@ -804,5 +808,15 @@ static inline u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle) } static inline void arm_smmu_sva_notifier_synchronize(void) {} + +static inline int arm_smmu_sva_attach_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t id) +{ + return -ENODEV; +} + +static inline void arm_smmu_sva_detach_dev_pasid(struct iommu_domain *domain, + struct device *dev, + ioasid_t id) {} #endif /* CONFIG_ARM_SMMU_V3_SVA */ #endif /* _ARM_SMMU_V3_H */ diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c index 22ddd05bbdcd..1e114b9dc17f 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c @@ -534,3 +534,48 @@ void arm_smmu_sva_notifier_synchronize(void) */ mmu_notifier_synchronize(); } + +int arm_smmu_sva_attach_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t id) +{ + int ret = 0; + struct iommu_sva *handle; + struct mm_struct *mm = domain->sva_cookie; + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + + if (smmu_domain->stage != ARM_SMMU_DOMAIN_S1 || + domain->type != IOMMU_DOMAIN_SVA || !mm) + return -EINVAL; + + mutex_lock(&sva_lock); + handle = __arm_smmu_sva_bind(dev, mm); + if (IS_ERR_OR_NULL(handle)) + ret = PTR_ERR(handle); + mutex_unlock(&sva_lock); + + return ret; +} + +void arm_smmu_sva_detach_dev_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t id) +{ + struct arm_smmu_bond *bond = NULL, *t; + struct mm_struct *mm = domain->sva_cookie; + struct arm_smmu_master *master = dev_iommu_priv_get(dev); + + mutex_lock(&sva_lock); + list_for_each_entry(t, &master->bonds, list) { + if (t->mm == mm) { + bond = t; + break; + } + } + + if (!WARN_ON(!bond) && refcount_dec_and_test(&bond->refs)) { + list_del(&bond->list); + arm_smmu_mmu_notifier_put(bond->smmu_mn); + iommu_sva_free_pasid(bond->mm); + kfree(bond); + } + mutex_unlock(&sva_lock); +} diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 8e262210b5ad..2e9d3cd30510 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -88,6 +88,8 @@ static struct arm_smmu_option_prop arm_smmu_options[] = { { 0, NULL}, }; +static void arm_smmu_domain_free(struct iommu_domain *domain); + static void parse_driver_options(struct arm_smmu_device *smmu) { int i = 0; @@ -1995,6 +1997,12 @@ static bool arm_smmu_capable(enum iommu_cap cap) } } +static const struct iommu_domain_ops arm_smmu_sva_domain_ops = { + .attach_dev_pasid = arm_smmu_sva_attach_dev_pasid, + .detach_dev_pasid = arm_smmu_sva_detach_dev_pasid, + .free = arm_smmu_domain_free, +}; + static struct iommu_domain *arm_smmu_domain_alloc(unsigned type) { struct arm_smmu_domain *smmu_domain; @@ -2002,7 +2010,8 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type) if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA && type != IOMMU_DOMAIN_DMA_FQ && - type != IOMMU_DOMAIN_IDENTITY) + type != IOMMU_DOMAIN_IDENTITY && + type != IOMMU_DOMAIN_SVA) return NULL; /* @@ -2018,6 +2027,8 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type) INIT_LIST_HEAD(&smmu_domain->devices); spin_lock_init(&smmu_domain->devices_lock); INIT_LIST_HEAD(&smmu_domain->mmu_notifiers); + if (type == IOMMU_DOMAIN_SVA) + smmu_domain->domain.ops = &arm_smmu_sva_domain_ops; return &smmu_domain->domain; } -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu