From patchwork Mon Nov 27 06:34:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13469171 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="IRZOYP70" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5C34B9E; Sun, 26 Nov 2023 22:34:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701066872; x=1732602872; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=THSTj804tptnmR/MFvHQIO8aGmu5XCp9mxbj13d6iE8=; b=IRZOYP70pBBTrijivqsNTyBsR7LQJyJdwcxFJ95nPJIyeh+rfK3XUua2 hm5VKfER+vvm5wzFh3hUf9nQl2ozFFfMUegX/I3iDEy8L5qV2YV1T+Pnh zlcAMSrYMQD9KuizRwac0Ko5ZMzRQKznAW/AWsyt7KAHs5XF8NOgx8ltL oNfutFb2op9LfYjCZAzQ/sdC+HJPO5Lx3TViNsbREzhnIJOsDGTORNgbE FtOzD3MCI118uR5RiM1BVKI+xiBAa6cCp2ngaUNAamxo4YInFFNq5nm0z ioXXksxYPtfh9OTMyaUzZicjUuuaSHTCPDdsYAJCQgqbHZuvxLFUa+58o w==; X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="391518132" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="391518132" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2023 22:34:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="838608926" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="838608926" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga004.fm.intel.com with ESMTP; 26 Nov 2023 22:34:31 -0800 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, xin.zeng@intel.com, yan.y.zhao@intel.com Subject: [PATCH 1/8] iommu: Introduce a replace API for device pasid Date: Sun, 26 Nov 2023 22:34:21 -0800 Message-Id: <20231127063428.127436-2-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231127063428.127436-1-yi.l.liu@intel.com> References: <20231127063428.127436-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Lu Baolu Provide a high-level API to allow replacements of one domain with another for specific pasid of a device. This is similar to iommu_group_replace_domain() and it is also expected to be used only by IOMMUFD. Signed-off-by: Lu Baolu Signed-off-by: Yi Liu --- drivers/iommu/iommu-priv.h | 2 + drivers/iommu/iommu.c | 82 +++++++++++++++++++++++++++++++------- 2 files changed, 70 insertions(+), 14 deletions(-) diff --git a/drivers/iommu/iommu-priv.h b/drivers/iommu/iommu-priv.h index 2024a2313348..5c32637f6325 100644 --- a/drivers/iommu/iommu-priv.h +++ b/drivers/iommu/iommu-priv.h @@ -19,6 +19,8 @@ static inline const struct iommu_ops *dev_iommu_ops(struct device *dev) int iommu_group_replace_domain(struct iommu_group *group, struct iommu_domain *new_domain); +int iommu_replace_device_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid); int iommu_device_register_bus(struct iommu_device *iommu, const struct iommu_ops *ops, struct bus_type *bus, diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 9d573e971aff..ec213ebd5ecc 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -3430,6 +3430,27 @@ static void __iommu_remove_group_pasid(struct iommu_group *group, } } +static int __iommu_group_attach_pasid(struct iommu_domain *domain, + struct iommu_group *group, ioasid_t pasid) +{ + void *curr; + int ret; + + lockdep_assert_held(&group->mutex); + + curr = xa_cmpxchg(&group->pasid_array, pasid, NULL, domain, GFP_KERNEL); + if (curr) + return xa_err(curr) ? : -EBUSY; + + ret = __iommu_set_group_pasid(domain, group, pasid); + if (ret) { + __iommu_remove_group_pasid(group, pasid); + xa_erase(&group->pasid_array, pasid); + } + + return ret; +} + /* * iommu_attach_device_pasid() - Attach a domain to pasid of device * @domain: the iommu domain. @@ -3453,19 +3474,9 @@ int iommu_attach_device_pasid(struct iommu_domain *domain, return -ENODEV; mutex_lock(&group->mutex); - curr = xa_cmpxchg(&group->pasid_array, pasid, NULL, domain, GFP_KERNEL); - if (curr) { - ret = xa_err(curr) ? : -EBUSY; - goto out_unlock; - } - - ret = __iommu_set_group_pasid(domain, group, pasid); - if (ret) { - __iommu_remove_group_pasid(group, pasid); - xa_erase(&group->pasid_array, pasid); - } -out_unlock: + ret = __iommu_group_attach_pasid(domain, group, pasid); mutex_unlock(&group->mutex); + return ret; } EXPORT_SYMBOL_GPL(iommu_attach_device_pasid); @@ -3479,8 +3490,8 @@ EXPORT_SYMBOL_GPL(iommu_attach_device_pasid); * The @domain must have been attached to @pasid of the @dev with * iommu_attach_device_pasid(). */ -void iommu_detach_device_pasid(struct iommu_domain *domain, struct device *dev, - ioasid_t pasid) +void iommu_detach_device_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid) { /* Caller must be a probed driver on dev */ struct iommu_group *group = dev->iommu_group; @@ -3492,6 +3503,49 @@ void iommu_detach_device_pasid(struct iommu_domain *domain, struct device *dev, } EXPORT_SYMBOL_GPL(iommu_detach_device_pasid); +/** + * iommu_replace_device_pasid - replace the domain that a pasid is attached to + * @domain: new IOMMU domain to replace with + * @dev: the physical device + * @pasid: pasid that will be attached to the new domain + * + * This API allows the pasid to switch domains. Return 0 on success, or an + * error. The pasid will roll back to use the old domain if failure. The + * caller could call iommu_detach_device_pasid() before free the old domain + * in order to avoid use-after-free case. + */ +int iommu_replace_device_pasid(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid) +{ + struct iommu_group *group = dev->iommu_group; + struct iommu_domain *old_domain; + int ret; + + if (!domain) + return -EINVAL; + + if (!group) + return -ENODEV; + + mutex_lock(&group->mutex); + __iommu_remove_group_pasid(group, pasid); + old_domain = xa_erase(&group->pasid_array, pasid); + ret = __iommu_group_attach_pasid(domain, group, pasid); + if (ret) + goto err_rollback; + mutex_unlock(&group->mutex); + + return 0; + +err_rollback: + if (old_domain) + __iommu_group_attach_pasid(old_domain, group, pasid); + mutex_unlock(&group->mutex); + + return ret; +} +EXPORT_SYMBOL_NS_GPL(iommu_replace_device_pasid, IOMMUFD_INTERNAL); + /* * iommu_get_domain_for_dev_pasid() - Retrieve domain for @pasid of @dev * @dev: the queried device From patchwork Mon Nov 27 06:34:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13469172 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="ObDitU70" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA83B93; Sun, 26 Nov 2023 22:34:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701066873; x=1732602873; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gfJ5Tr0rMCO47IrzKCPsGdamJiWS8H3RpIXUStFV1G8=; b=ObDitU70vmjvyDnBIiEPBb9TFqEsDXHXh/zXrnVhDs3pf9qP5dOVAV7P DVqnpxkgComSftdmACtwAwJ1eTZR56dYkldrNNFu09AWt5lTOqZsLcB86 lF7eR6yOq6PY0JRcu1pPL178sUuYah7ILiY4XM3oN0GrUm7MEPaHSXjp3 9YndoTIPvB/YBFRqnwywQeinFAIendA3M4MRobCzfLZEO3GKYHFlDer0F cYlEGLmpvnsFL3l19u5i8ZvRhRvrhVM6ax5fiqC3AukxvHYy8h8Z/VaWZ 7m7/foDqYJ24up7xG+TH2vritjJmYsTxzu78dbBrrcZAHmJVD9Aa5jzgn A==; X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="391518145" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="391518145" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2023 22:34:33 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="838608931" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="838608931" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga004.fm.intel.com with ESMTP; 26 Nov 2023 22:34:32 -0800 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, xin.zeng@intel.com, yan.y.zhao@intel.com Subject: [PATCH 2/8] iommufd: replace attach_fn with a structure Date: Sun, 26 Nov 2023 22:34:22 -0800 Message-Id: <20231127063428.127436-3-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231127063428.127436-1-yi.l.liu@intel.com> References: <20231127063428.127436-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Most of the core logic before conducting the actual device attach/ replace operation can be shared with pasid attach/replace. Create a new structure so more information (e.g. pasid) can be later added along with the attach_fn. Signed-off-by: Kevin Tian Signed-off-by: Yi Liu --- drivers/iommu/iommufd/device.c | 35 ++++++++++++++++--------- drivers/iommu/iommufd/iommufd_private.h | 8 ++++++ 2 files changed, 30 insertions(+), 13 deletions(-) diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index 59d3a07300d9..0992d9d46af9 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -531,8 +531,11 @@ iommufd_device_do_replace(struct iommufd_device *idev, return ERR_PTR(rc); } -typedef struct iommufd_hw_pagetable *(*attach_fn)( - struct iommufd_device *idev, struct iommufd_hw_pagetable *hwpt); +static struct iommufd_hw_pagetable *do_attach(struct iommufd_device *idev, + struct iommufd_hw_pagetable *hwpt, struct attach_data *data) +{ + return data->attach_fn(idev, hwpt); +} /* * When automatically managing the domains we search for a compatible domain in @@ -542,7 +545,7 @@ typedef struct iommufd_hw_pagetable *(*attach_fn)( static struct iommufd_hw_pagetable * iommufd_device_auto_get_domain(struct iommufd_device *idev, struct iommufd_ioas *ioas, u32 *pt_id, - attach_fn do_attach) + struct attach_data *data) { /* * iommufd_hw_pagetable_attach() is called by @@ -551,7 +554,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev, * to use the immediate_attach path as it supports drivers that can't * directly allocate a domain. */ - bool immediate_attach = do_attach == iommufd_device_do_attach; + bool immediate_attach = data->attach_fn == iommufd_device_do_attach; struct iommufd_hw_pagetable *destroy_hwpt; struct iommufd_hwpt_paging *hwpt_paging; struct iommufd_hw_pagetable *hwpt; @@ -569,7 +572,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev, hwpt = &hwpt_paging->common; if (!iommufd_lock_obj(&hwpt->obj)) continue; - destroy_hwpt = (*do_attach)(idev, hwpt); + destroy_hwpt = do_attach(idev, hwpt, data); if (IS_ERR(destroy_hwpt)) { iommufd_put_object(&hwpt->obj); /* @@ -596,7 +599,7 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev, hwpt = &hwpt_paging->common; if (!immediate_attach) { - destroy_hwpt = (*do_attach)(idev, hwpt); + destroy_hwpt = do_attach(idev, hwpt, data); if (IS_ERR(destroy_hwpt)) goto out_abort; } else { @@ -617,8 +620,8 @@ iommufd_device_auto_get_domain(struct iommufd_device *idev, return destroy_hwpt; } -static int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id, - attach_fn do_attach) +int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id, + struct attach_data *data) { struct iommufd_hw_pagetable *destroy_hwpt; struct iommufd_object *pt_obj; @@ -633,7 +636,7 @@ static int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id, struct iommufd_hw_pagetable *hwpt = container_of(pt_obj, struct iommufd_hw_pagetable, obj); - destroy_hwpt = (*do_attach)(idev, hwpt); + destroy_hwpt = do_attach(idev, hwpt, data); if (IS_ERR(destroy_hwpt)) goto out_put_pt_obj; break; @@ -643,7 +646,7 @@ static int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id, container_of(pt_obj, struct iommufd_ioas, obj); destroy_hwpt = iommufd_device_auto_get_domain(idev, ioas, pt_id, - do_attach); + data); if (IS_ERR(destroy_hwpt)) goto out_put_pt_obj; break; @@ -679,8 +682,11 @@ static int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id, int iommufd_device_attach(struct iommufd_device *idev, u32 *pt_id) { int rc; + struct attach_data data = { + .attach_fn = &iommufd_device_do_attach, + }; - rc = iommufd_device_change_pt(idev, pt_id, &iommufd_device_do_attach); + rc = iommufd_device_change_pt(idev, pt_id, &data); if (rc) return rc; @@ -710,8 +716,11 @@ EXPORT_SYMBOL_NS_GPL(iommufd_device_attach, IOMMUFD); */ int iommufd_device_replace(struct iommufd_device *idev, u32 *pt_id) { - return iommufd_device_change_pt(idev, pt_id, - &iommufd_device_do_replace); + struct attach_data data = { + .attach_fn = &iommufd_device_do_replace, + }; + + return iommufd_device_change_pt(idev, pt_id, &data); } EXPORT_SYMBOL_NS_GPL(iommufd_device_replace, IOMMUFD); diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index 160521800d9b..24fee2c37ce8 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -363,6 +363,14 @@ iommufd_get_device(struct iommufd_ucmd *ucmd, u32 id) void iommufd_device_destroy(struct iommufd_object *obj); int iommufd_get_hw_info(struct iommufd_ucmd *ucmd); +struct attach_data { + union { + struct iommufd_hw_pagetable *(*attach_fn)( + struct iommufd_device *idev, + struct iommufd_hw_pagetable *hwpt); + }; +}; + struct iommufd_access { struct iommufd_object obj; struct iommufd_ctx *ictx; From patchwork Mon Nov 27 06:34:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13469174 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="SS+jznkO" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56C57113; Sun, 26 Nov 2023 22:34:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701066875; x=1732602875; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=iT9eIn278vkOWi9dRXT18eAeEBSlb7+r8lhrdpdya2o=; b=SS+jznkOGL/k2AaJrVg3g1ZsLFeZNjA79e2+jJGT6d4+C3ycsWnoL3ok OO47oFF0fCb3j6b/WUeNVXOj9fy/DfvNO9S7zinpG43iIHrlknBQSWtZl PKvN76NElPEUEnUdwIgIPtvfMLzGr59/Uy/INvZ2M6/O5S0ak+Fh6hdao wd6tsSkSyFc92L0Yz/Jq1ex223j32N/N/WYp5GvaVxcMiEhIOHM94N8jF RCrLqaiooux7Gphu0RE8hVs89TP4QDn4K5QdRMNbkfkVeacJXOTBs4OCN 2CUWtPXg5HfY49oFjAbpl+zM7AHH80Q1edTVuOO2vP3rhI+HInFIIwde1 Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="391518158" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="391518158" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2023 22:34:34 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="838608935" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="838608935" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga004.fm.intel.com with ESMTP; 26 Nov 2023 22:34:34 -0800 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, xin.zeng@intel.com, yan.y.zhao@intel.com Subject: [PATCH 3/8] iommufd: Support attach/replace hwpt per pasid Date: Sun, 26 Nov 2023 22:34:23 -0800 Message-Id: <20231127063428.127436-4-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231127063428.127436-1-yi.l.liu@intel.com> References: <20231127063428.127436-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Kevin Tian This introduces three APIs for device drivers to manage pasid attach/ replace/detach. int iommufd_device_pasid_attach(struct iommufd_device *idev, u32 pasid, u32 *pt_id); int iommufd_device_pasid_replace(struct iommufd_device *idev, u32 pasid, u32 *pt_id); void iommufd_device_pasid_detach(struct iommufd_device *idev, u32 pasid); pasid operations have different implications when comparing to device operations: - No connection to iommufd_group since pasid is a device capability and can be enabled only in singleton group; - no reserved region per pasid otherwise SVA architecture is already broken (CPU address space doesn't count device reserved regions); - accordingly no sw_msi trick; - immediated_attach is not supported, expecting that arm-smmu driver will already remove that requirement before supporting this pasid operation. This avoids unnecessary change in iommufd_hw_pagetable_alloc() to carry the pasid from device.c. With above differences, this puts all pasid related logics into a new pasid.c file. Cache coherency enforcement is still applied to pasid operations since it is about memory accesses post page table walking (no matter the walk is per RID or per PASID). Since the attach is per PASID, this introduces a pasid_hwpts xarray to track the per-pasid attach data. Signed-off-by: Kevin Tian Signed-off-by: Yi Liu --- drivers/iommu/iommufd/Makefile | 1 + drivers/iommu/iommufd/device.c | 17 ++- drivers/iommu/iommufd/iommufd_private.h | 15 +++ drivers/iommu/iommufd/pasid.c | 138 ++++++++++++++++++++++++ include/linux/iommufd.h | 6 ++ 5 files changed, 176 insertions(+), 1 deletion(-) create mode 100644 drivers/iommu/iommufd/pasid.c diff --git a/drivers/iommu/iommufd/Makefile b/drivers/iommu/iommufd/Makefile index 34b446146961..4b4d516b025c 100644 --- a/drivers/iommu/iommufd/Makefile +++ b/drivers/iommu/iommufd/Makefile @@ -6,6 +6,7 @@ iommufd-y := \ ioas.o \ main.o \ pages.o \ + pasid.o \ vfio_compat.o iommufd-$(CONFIG_IOMMUFD_TEST) += selftest.o diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index 0992d9d46af9..a7574d4d5ffa 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -136,6 +136,7 @@ void iommufd_device_destroy(struct iommufd_object *obj) struct iommufd_device *idev = container_of(obj, struct iommufd_device, obj); + WARN_ON(!xa_empty(&idev->pasid_hwpts)); iommu_device_release_dma_owner(idev->dev); iommufd_put_group(idev->igroup); if (!iommufd_selftest_is_mock_dev(idev->dev)) @@ -216,6 +217,8 @@ struct iommufd_device *iommufd_device_bind(struct iommufd_ctx *ictx, /* igroup refcount moves into iommufd_device */ idev->igroup = igroup; + xa_init(&idev->pasid_hwpts); + /* * If the caller fails after this success it must call * iommufd_unbind_device() which is safe since we hold this refcount. @@ -534,7 +537,17 @@ iommufd_device_do_replace(struct iommufd_device *idev, static struct iommufd_hw_pagetable *do_attach(struct iommufd_device *idev, struct iommufd_hw_pagetable *hwpt, struct attach_data *data) { - return data->attach_fn(idev, hwpt); + if (data->pasid == IOMMU_PASID_INVALID) { + BUG_ON((data->attach_fn != iommufd_device_do_attach) && + (data->attach_fn != iommufd_device_do_replace)); + return data->attach_fn(idev, hwpt); + } else { + BUG_ON((data->pasid_attach_fn != + iommufd_device_pasid_do_attach) && + (data->pasid_attach_fn != + iommufd_device_pasid_do_replace)); + return data->pasid_attach_fn(idev, data->pasid, hwpt); + } } /* @@ -684,6 +697,7 @@ int iommufd_device_attach(struct iommufd_device *idev, u32 *pt_id) int rc; struct attach_data data = { .attach_fn = &iommufd_device_do_attach, + .pasid = IOMMU_PASID_INVALID, }; rc = iommufd_device_change_pt(idev, pt_id, &data); @@ -718,6 +732,7 @@ int iommufd_device_replace(struct iommufd_device *idev, u32 *pt_id) { struct attach_data data = { .attach_fn = &iommufd_device_do_replace, + .pasid = IOMMU_PASID_INVALID, }; return iommufd_device_change_pt(idev, pt_id, &data); diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index 24fee2c37ce8..d37b7d0bfffe 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -349,6 +349,7 @@ struct iommufd_device { struct list_head group_item; /* always the physical device */ struct device *dev; + struct xarray pasid_hwpts; bool enforce_cache_coherency; }; @@ -368,9 +369,23 @@ struct attach_data { struct iommufd_hw_pagetable *(*attach_fn)( struct iommufd_device *idev, struct iommufd_hw_pagetable *hwpt); + struct iommufd_hw_pagetable *(*pasid_attach_fn)( + struct iommufd_device *idev, u32 pasid, + struct iommufd_hw_pagetable *hwpt); }; + u32 pasid; }; +int iommufd_device_change_pt(struct iommufd_device *idev, u32 *pt_id, + struct attach_data *data); + +struct iommufd_hw_pagetable * +iommufd_device_pasid_do_attach(struct iommufd_device *idev, u32 pasid, + struct iommufd_hw_pagetable *hwpt); +struct iommufd_hw_pagetable * +iommufd_device_pasid_do_replace(struct iommufd_device *idev, u32 pasid, + struct iommufd_hw_pagetable *hwpt); + struct iommufd_access { struct iommufd_object obj; struct iommufd_ctx *ictx; diff --git a/drivers/iommu/iommufd/pasid.c b/drivers/iommu/iommufd/pasid.c new file mode 100644 index 000000000000..75499a1d92a1 --- /dev/null +++ b/drivers/iommu/iommufd/pasid.c @@ -0,0 +1,138 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (c) 2023, Intel Corporation + */ +#include +#include +#include "../iommu-priv.h" + +#include "iommufd_private.h" + +static int __iommufd_device_pasid_do_attach(struct iommufd_device *idev, + u32 pasid, + struct iommufd_hw_pagetable *hwpt, + bool replace) +{ + int rc; + + if (!replace) + rc = iommu_attach_device_pasid(hwpt->domain, idev->dev, pasid); + else + rc = iommu_replace_device_pasid(hwpt->domain, idev->dev, pasid); + if (rc) + return rc; + + refcount_inc(&hwpt->obj.users); + xa_store(&idev->pasid_hwpts, pasid, hwpt, GFP_KERNEL); + return 0; +} + +struct iommufd_hw_pagetable * +iommufd_device_pasid_do_attach(struct iommufd_device *idev, u32 pasid, + struct iommufd_hw_pagetable *hwpt) +{ + struct iommufd_hw_pagetable *old_hwpt; + int rc; + + old_hwpt = xa_load(&idev->pasid_hwpts, pasid); + if (old_hwpt) { + /* Attach does not allow overwrite */ + if (old_hwpt == hwpt) + return NULL; + else + return ERR_PTR(-EINVAL); + } + + rc = __iommufd_device_pasid_do_attach(idev, pasid, hwpt, false); + return rc ? ERR_PTR(rc) : NULL; +} + +struct iommufd_hw_pagetable * +iommufd_device_pasid_do_replace(struct iommufd_device *idev, u32 pasid, + struct iommufd_hw_pagetable *hwpt) +{ + struct iommufd_hw_pagetable *old_hwpt; + int rc; + + old_hwpt = xa_load(&idev->pasid_hwpts, pasid); + if (!old_hwpt) + return ERR_PTR(-EINVAL); + + if (hwpt == old_hwpt) + return NULL; + + rc = __iommufd_device_pasid_do_attach(idev, pasid, hwpt, true); + /* Caller must destroy old_hwpt */ + return rc ? ERR_PTR(rc) : old_hwpt; +} + +/** + * iommufd_device_pasid_attach - Connect a {device, pasid} to an iommu_domain + * @idev: device to attach + * @pasid: pasid to attach + * @pt_id: Input a IOMMUFD_OBJ_IOAS, or IOMMUFD_OBJ_HW_PAGETABLE + * Output the IOMMUFD_OBJ_HW_PAGETABLE ID + * + * This connects a pasid of the device to an iommu_domain. Once this + * completes the device could do DMA with the pasid. + * + * This function is undone by calling iommufd_device_detach_pasid(). + */ +int iommufd_device_pasid_attach(struct iommufd_device *idev, + u32 pasid, u32 *pt_id) +{ + struct attach_data data = { + .pasid_attach_fn = &iommufd_device_pasid_do_attach, + .pasid = pasid, + }; + + return iommufd_device_change_pt(idev, pt_id, &data); +} +EXPORT_SYMBOL_NS_GPL(iommufd_device_pasid_attach, IOMMUFD); + +/** + * iommufd_device_pasid_replace- Change the {device, pasid}'s iommu_domain + * @idev: device to change + * @pasid: pasid to change + * @pt_id: Input a IOMMUFD_OBJ_IOAS, or IOMMUFD_OBJ_HW_PAGETABLE + * Output the IOMMUFD_OBJ_HW_PAGETABLE ID + * + * This is the same as + * iommufd_device_pasid_detach(); + * iommufd_device_pasid_attach(); + * + * If it fails then no change is made to the attachment. The iommu driver may + * implement this so there is no disruption in translation. This can only be + * called if iommufd_device_pasid_attach() has already succeeded. + */ +int iommufd_device_pasid_replace(struct iommufd_device *idev, + u32 pasid, u32 *pt_id) +{ + struct attach_data data = { + .pasid_attach_fn = &iommufd_device_pasid_do_replace, + .pasid = pasid, + }; + + return iommufd_device_change_pt(idev, pt_id, &data); +} +EXPORT_SYMBOL_NS_GPL(iommufd_device_pasid_replace, IOMMUFD); + +/** + * iommufd_device_pasid_detach - Disconnect a {device, pasid} to an iommu_domain + * @idev: device to detach + * @pasid: pasid to detach + * + * Undo iommufd_device_pasid_attach(). This disconnects the idev/pasid from + * the previously attached pt_id. + */ +void iommufd_device_pasid_detach(struct iommufd_device *idev, u32 pasid) +{ + struct iommufd_hw_pagetable *hwpt; + + hwpt = xa_load(&idev->pasid_hwpts, pasid); + if (!hwpt) + return; + xa_erase(&idev->pasid_hwpts, pasid); + iommu_detach_device_pasid(hwpt->domain, idev->dev, pasid); + iommufd_hw_pagetable_put(idev->ictx, hwpt); +} +EXPORT_SYMBOL_NS_GPL(iommufd_device_pasid_detach, IOMMUFD); diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index ffc3a949f837..0b007c376306 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -26,6 +26,12 @@ int iommufd_device_attach(struct iommufd_device *idev, u32 *pt_id); int iommufd_device_replace(struct iommufd_device *idev, u32 *pt_id); void iommufd_device_detach(struct iommufd_device *idev); +int iommufd_device_pasid_attach(struct iommufd_device *idev, + u32 pasid, u32 *pt_id); +int iommufd_device_pasid_replace(struct iommufd_device *idev, + u32 pasid, u32 *pt_id); +void iommufd_device_pasid_detach(struct iommufd_device *idev, u32 pasid); + struct iommufd_ctx *iommufd_device_to_ictx(struct iommufd_device *idev); u32 iommufd_device_to_id(struct iommufd_device *idev); From patchwork Mon Nov 27 06:34:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13469173 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="iKWhKpOy" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D3CFC12F; Sun, 26 Nov 2023 22:34:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701066876; x=1732602876; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yZ2ZM14suqOR6uWNGYJVIr5wJqTHJJ9fSMownQVohd4=; b=iKWhKpOyvcGW0g8bPt36MIBtXJVO2xGPoxx2gGzI1KIBJdYUSuVuB9rm pGCAjbSFDreSGjjAfdDoCPX+oWRrRn07SkfHmoZ1Nl6qO8oMzFH19HBbd OHTLoxZ9kXGs9aJm4xrGLITRGT1gYm3lOvG7bQcvm47DMOzOcNGSbPOHe KkrTAZWh5hVLMtCDG3NFNOFPkw/s+FyalU8JmrDOGzsL/f+fblUnDdsZY B7Tds8I6ekV+8tsF6l7h/XozE4UHVMUMOgNXg2OrRhP1hOAHIpT9/IgYB hXaWemA/o2wSQX2tMN3LyO5Mhf2pb605Vrj78WOgNJPhSO/0smxDdunPA Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="391518172" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="391518172" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2023 22:34:36 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="838608940" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="838608940" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga004.fm.intel.com with ESMTP; 26 Nov 2023 22:34:35 -0800 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, xin.zeng@intel.com, yan.y.zhao@intel.com Subject: [PATCH 4/8] iommufd/selftest: Add set_dev_pasid and remove_dev_pasid in mock iommu Date: Sun, 26 Nov 2023 22:34:24 -0800 Message-Id: <20231127063428.127436-5-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231127063428.127436-1-yi.l.liu@intel.com> References: <20231127063428.127436-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The two callbacks are needed to make pasid_attach/detach path complete for mock device. A nop is enough for set_dev_pasid, a domain type check in the remove_dev_pasid is also helpful. Signed-off-by: Yi Liu --- drivers/iommu/iommufd/selftest.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index f2d4599f701b..221a206bf38f 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -440,6 +440,31 @@ static struct iommu_device *mock_probe_device(struct device *dev) return &mock_iommu_device; } +static void mock_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid) +{ + struct iommu_domain *domain; + + /* Domain type specific cleanup: */ + domain = iommu_get_domain_for_dev_pasid(dev, pasid, 0); + if (domain) { + switch (domain->type) { + case IOMMU_DOMAIN_NESTED: + case IOMMU_DOMAIN_UNMANAGED: + break; + default: + /* should never reach here */ + WARN_ON(1); + break; + } + } +} + +static int mock_domain_set_dev_pasid_nop(struct iommu_domain *domain, + struct device *dev, ioasid_t pasid) +{ + return 0; +} + static const struct iommu_ops mock_ops = { /* * IOMMU_DOMAIN_BLOCKED cannot be returned from def_domain_type() @@ -455,6 +480,7 @@ static const struct iommu_ops mock_ops = { .capable = mock_domain_capable, .device_group = generic_device_group, .probe_device = mock_probe_device, + .remove_dev_pasid = mock_iommu_remove_dev_pasid, .default_domain_ops = &(struct iommu_domain_ops){ .free = mock_domain_free, @@ -462,6 +488,7 @@ static const struct iommu_ops mock_ops = { .map_pages = mock_domain_map_pages, .unmap_pages = mock_domain_unmap_pages, .iova_to_phys = mock_domain_iova_to_phys, + .set_dev_pasid = mock_domain_set_dev_pasid_nop, }, }; @@ -519,6 +546,7 @@ static struct iommu_domain_ops domain_nested_ops = { .free = mock_domain_free_nested, .attach_dev = mock_domain_nop_attach, .cache_invalidate_user = mock_domain_cache_invalidate_user, + .set_dev_pasid = mock_domain_set_dev_pasid_nop, }; static inline struct iommufd_hw_pagetable * From patchwork Mon Nov 27 06:34:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13469175 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="LtvPq8MB" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7692F9E; Sun, 26 Nov 2023 22:34:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701066879; x=1732602879; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=PYK6CzX/KC3fA+NEP1moXvit0m+FqGYstm2SuVEzKLg=; b=LtvPq8MBe4rpIufswOYZOkrJN9Ugq7QdLbiJlMNdsKTYcDZmdlJAcptg J+IdD9r2Q+GrYjZVni0Ju5KAxMACC2SpG7Sp67KDV5TGCmdS9sKpBVr6z 2MNPH0uCWsA6TkZfFRexkima83rX6BdRP7X/ah0T+3QoQyVXOcRkvxriU aOzO4YUBAGTPzJhgS2+oRWyzZEISJRM09LkfS87ynJjV4jeyoH5xW8faT LCkwZaOWfdf5QyVOMKnsvwLheV+dP+PmBt1THmQCbWH9IT5D6KvcsTdFF RSIMsKIevsatTmb3BosYjVztVMwMlPk4OaOTbNT9BTkeeriXHx3quCX2+ w==; X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="391518187" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="391518187" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2023 22:34:39 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="838608944" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="838608944" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga004.fm.intel.com with ESMTP; 26 Nov 2023 22:34:38 -0800 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, xin.zeng@intel.com, yan.y.zhao@intel.com Subject: [PATCH 5/8] iommufd/selftest: Add a helper to get test device Date: Sun, 26 Nov 2023 22:34:25 -0800 Message-Id: <20231127063428.127436-6-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231127063428.127436-1-yi.l.liu@intel.com> References: <20231127063428.127436-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 There is need to get the selftest device (sobj->type == TYPE_IDEV) in multiple places, so have a helper to for it. Signed-off-by: Yi Liu --- drivers/iommu/iommufd/selftest.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-) diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index 221a206bf38f..9b9fd3f50264 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -720,29 +720,39 @@ static int iommufd_test_mock_domain(struct iommufd_ucmd *ucmd, return rc; } -/* Replace the mock domain with a manually allocated hw_pagetable */ -static int iommufd_test_mock_domain_replace(struct iommufd_ucmd *ucmd, - unsigned int device_id, u32 pt_id, - struct iommu_test_cmd *cmd) +static struct selftest_obj * +iommufd_test_get_self_test_device(struct iommufd_ctx *ictx, u32 id) { struct iommufd_object *dev_obj; struct selftest_obj *sobj; - int rc; /* * Prefer to use the OBJ_SELFTEST because the destroy_rwsem will ensure * it doesn't race with detach, which is not allowed. */ - dev_obj = - iommufd_get_object(ucmd->ictx, device_id, IOMMUFD_OBJ_SELFTEST); + dev_obj = iommufd_get_object(ictx, id, IOMMUFD_OBJ_SELFTEST); if (IS_ERR(dev_obj)) - return PTR_ERR(dev_obj); + return (struct selftest_obj *)dev_obj; sobj = container_of(dev_obj, struct selftest_obj, obj); if (sobj->type != TYPE_IDEV) { - rc = -EINVAL; - goto out_dev_obj; + iommufd_put_object(dev_obj); + return ERR_PTR(-EINVAL); } + return sobj; +} + +/* Replace the mock domain with a manually allocated hw_pagetable */ +static int iommufd_test_mock_domain_replace(struct iommufd_ucmd *ucmd, + unsigned int device_id, u32 pt_id, + struct iommu_test_cmd *cmd) +{ + struct selftest_obj *sobj; + int rc; + + sobj = iommufd_test_get_self_test_device(ucmd->ictx, device_id); + if (IS_ERR(sobj)) + return PTR_ERR(sobj); rc = iommufd_device_replace(sobj->idev.idev, &pt_id); if (rc) @@ -752,7 +762,7 @@ static int iommufd_test_mock_domain_replace(struct iommufd_ucmd *ucmd, rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); out_dev_obj: - iommufd_put_object(dev_obj); + iommufd_put_object(&sobj->obj); return rc; } From patchwork Mon Nov 27 06:34:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13469176 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="nB1l5mXz" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94A7E13A; Sun, 26 Nov 2023 22:34:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701066881; x=1732602881; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=l8hnQUYJqbfyassV0T4QjqB6JY+yyUnxn2V+C7eDSi8=; b=nB1l5mXz+0Pz94qDsBaj4VZbE+QY9AIE1ErbaeiaHMuXoSRmyVsCtYPb mZ15L4ocAFc6eK7P7q1g2/QzW4fcVc6D4i4M1IrETVR7JoRAAvFHR1R8M u8VNzP2IDxvRl6sCkM2f6XAgGNrWfOKh9QaNWaL4P8E/3hU91YrzC1v6o Ww+IdNk/gNUiAwCBPKNT8lUgXpQvxHudMikX8pRZvN9dU3K72ltxXnvSp Mfq5T5T6gxcDHi9FsCQxZ99+pAA1uciil1fabFNoji44OdfFnvXmhpUFn SLv1PhPsvOc+7B6HU7s7jNHv0u4bQH+pJmZlhxk62XVU/IhNIfCoaOWT0 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="391518198" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="391518198" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2023 22:34:41 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="838608947" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="838608947" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga004.fm.intel.com with ESMTP; 26 Nov 2023 22:34:40 -0800 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, xin.zeng@intel.com, yan.y.zhao@intel.com Subject: [PATCH 6/8] iommufd/selftest: Add test ops to test pasid attach/detach Date: Sun, 26 Nov 2023 22:34:26 -0800 Message-Id: <20231127063428.127436-7-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231127063428.127436-1-yi.l.liu@intel.com> References: <20231127063428.127436-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This adds 4 test ops for pasid attach/replace/detach testing. There are ops to attach/detach pasid, and also op to check the attached domain of a pasid. Signed-off-by: Yi Liu --- drivers/iommu/iommufd/iommufd_test.h | 24 ++++++ drivers/iommu/iommufd/selftest.c | 116 +++++++++++++++++++++++++++ 2 files changed, 140 insertions(+) diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index 35d6207a96dd..67c2a8508b92 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -22,6 +22,10 @@ enum { IOMMU_TEST_OP_MOCK_DOMAIN_FLAGS, IOMMU_TEST_OP_DIRTY, IOMMU_TEST_OP_MD_CHECK_IOTLB, + IOMMU_TEST_OP_PASID_ATTACH, + IOMMU_TEST_OP_PASID_REPLACE, + IOMMU_TEST_OP_PASID_DETACH, + IOMMU_TEST_OP_PASID_CHECK_DOMAIN, }; enum { @@ -126,6 +130,26 @@ struct iommu_test_cmd { __u32 id; __u32 iotlb; } check_iotlb; + struct { + __u32 pasid; + __u32 pt_id; + /* @id is stdev_id for IOMMU_TEST_OP_PASID_ATTACH */ + } pasid_attach; + struct { + __u32 pasid; + __u32 pt_id; + /* @id is stdev_id for IOMMU_TEST_OP_PASID_ATTACH */ + } pasid_replace; + struct { + __u32 pasid; + /* @id is stdev_id for IOMMU_TEST_OP_PASID_DETACH */ + } pasid_detach; + struct { + __u32 pasid; + __u32 hwpt_id; + __u64 out_result_ptr; + /* @id is stdev_id for IOMMU_TEST_OP_HWPT_GET_DOMAIN */ + } pasid_check; }; __u32 last; }; diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index 9b9fd3f50264..a3139ad534a1 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -1340,6 +1340,114 @@ static int iommufd_test_dirty(struct iommufd_ucmd *ucmd, unsigned int mockpt_id, return rc; } +static int iommufd_test_pasid_attach(struct iommufd_ucmd *ucmd, + struct iommu_test_cmd *cmd) +{ + struct selftest_obj *sobj; + int rc; + + sobj = iommufd_test_get_self_test_device(ucmd->ictx, cmd->id); + if (IS_ERR(sobj)) + return PTR_ERR(sobj); + + rc = iommufd_device_pasid_attach(sobj->idev.idev, + cmd->pasid_attach.pasid, + &cmd->pasid_attach.pt_id); + iommufd_put_object(&sobj->obj); + return rc; +} + +static int iommufd_test_pasid_replace(struct iommufd_ucmd *ucmd, + struct iommu_test_cmd *cmd) +{ + struct selftest_obj *sobj; + int rc; + + sobj = iommufd_test_get_self_test_device(ucmd->ictx, cmd->id); + if (IS_ERR(sobj)) + return PTR_ERR(sobj); + + rc = iommufd_device_pasid_replace(sobj->idev.idev, + cmd->pasid_attach.pasid, + &cmd->pasid_attach.pt_id); + iommufd_put_object(&sobj->obj); + return rc; +} + +static int iommufd_test_pasid_detach(struct iommufd_ucmd *ucmd, + struct iommu_test_cmd *cmd) +{ + struct selftest_obj *sobj; + + sobj = iommufd_test_get_self_test_device(ucmd->ictx, cmd->id); + if (IS_ERR(sobj)) + return PTR_ERR(sobj); + + iommufd_device_pasid_detach(sobj->idev.idev, + cmd->pasid_detach.pasid); + iommufd_put_object(&sobj->obj); + return 0; +} + +static inline struct iommufd_hw_pagetable * +iommufd_get_hwpt(struct iommufd_ucmd *ucmd, u32 id) +{ + struct iommufd_object *pt_obj; + + pt_obj = iommufd_get_object(ucmd->ictx, id, IOMMUFD_OBJ_ANY); + if (IS_ERR(pt_obj)) + return ERR_CAST(pt_obj); + + if (pt_obj->type != IOMMUFD_OBJ_HWPT_NESTED && + pt_obj->type != IOMMUFD_OBJ_HWPT_PAGING) { + iommufd_put_object(pt_obj); + return ERR_PTR(-EINVAL); + } + + return container_of(pt_obj, struct iommufd_hw_pagetable, obj); +} + +static int iommufd_test_pasid_check_domain(struct iommufd_ucmd *ucmd, + struct iommu_test_cmd *cmd) +{ + struct iommu_domain *attached_domain, *expect_domain = NULL; + struct iommufd_hw_pagetable *hwpt = NULL; + struct selftest_obj *sobj; + struct mock_dev *mdev; + bool result; + int rc = 0; + + sobj = iommufd_test_get_self_test_device(ucmd->ictx, cmd->id); + if (IS_ERR(sobj)) + return PTR_ERR(sobj); + + mdev = sobj->idev.mock_dev; + + attached_domain = iommu_get_domain_for_dev_pasid(&mdev->dev, + cmd->pasid_check.pasid, 0); + if (IS_ERR(attached_domain)) + attached_domain = NULL; + + if (cmd->pasid_check.hwpt_id) { + hwpt = iommufd_get_hwpt(ucmd, cmd->pasid_check.hwpt_id); + if (IS_ERR(hwpt)) { + rc = PTR_ERR(hwpt); + goto out_put_dev; + } + expect_domain = hwpt->domain; + } + + result = (attached_domain == expect_domain) ? 1 : 0; + if (copy_to_user(u64_to_user_ptr(cmd->pasid_check.out_result_ptr), + &result, sizeof(result))) + rc = -EFAULT; + if (hwpt) + iommufd_put_object(&hwpt->obj); +out_put_dev: + iommufd_put_object(&sobj->obj); + return rc; +} + void iommufd_selftest_destroy(struct iommufd_object *obj) { struct selftest_obj *sobj = container_of(obj, struct selftest_obj, obj); @@ -1415,6 +1523,14 @@ int iommufd_test(struct iommufd_ucmd *ucmd) cmd->dirty.page_size, u64_to_user_ptr(cmd->dirty.uptr), cmd->dirty.flags); + case IOMMU_TEST_OP_PASID_ATTACH: + return iommufd_test_pasid_attach(ucmd, cmd); + case IOMMU_TEST_OP_PASID_REPLACE: + return iommufd_test_pasid_replace(ucmd, cmd); + case IOMMU_TEST_OP_PASID_DETACH: + return iommufd_test_pasid_detach(ucmd, cmd); + case IOMMU_TEST_OP_PASID_CHECK_DOMAIN: + return iommufd_test_pasid_check_domain(ucmd, cmd); default: return -EOPNOTSUPP; } From patchwork Mon Nov 27 06:34:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13469177 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="RyK3mx5g" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06B66186; Sun, 26 Nov 2023 22:34:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701066883; x=1732602883; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GkpokbbZU4q0iBs6OdC+VBUxtyyaR/47ClPUeT1fPRA=; b=RyK3mx5gkndFFtEw35u7MD72g+IRzjTwSefaOvqPqiX3TWoaOOFk2ABR 6IHsxNs6qKIh3hJre6liTv+2SilSG6ptv5xlNIxav5uL7aGeMwewyr+Zv KVKWPeWjUuxVOlc1D8WREcg+2/YWOMUh7JNGxCXf1SZ21bfPoKdWvUDw/ XPHtC1dcaEIZqMeOHton2EliPqgV6x22VBLxVIj/We9cL1UM+Sg8k5BRV HrV2Sxuqq3mIV/En1ERMl9c7wil0kfNmrFiTyNykXPtwB7mUQegalmUKh dd7LQIgxhee5g7w1vvdPUuEY2DTuIc+/e1lZbPaKm6u6mBPMlc9juagTk g==; X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="391518210" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="391518210" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Nov 2023 22:34:42 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10906"; a="838608952" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="838608952" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga004.fm.intel.com with ESMTP; 26 Nov 2023 22:34:41 -0800 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, xin.zeng@intel.com, yan.y.zhao@intel.com Subject: [PATCH 7/8] iommufd/selftest: Add coverage for iommufd pasid attach/detach Date: Sun, 26 Nov 2023 22:34:27 -0800 Message-Id: <20231127063428.127436-8-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231127063428.127436-1-yi.l.liu@intel.com> References: <20231127063428.127436-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This tests iommufd pasid attach/replace/detach. Signed-off-by: Yi Liu --- tools/testing/selftests/iommu/iommufd.c | 172 ++++++++++++++++++ .../selftests/iommu/iommufd_fail_nth.c | 28 ++- tools/testing/selftests/iommu/iommufd_utils.h | 78 ++++++++ 3 files changed, 274 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c index 2781d5bc6309..4dfd2d33c0a0 100644 --- a/tools/testing/selftests/iommu/iommufd.c +++ b/tools/testing/selftests/iommu/iommufd.c @@ -2221,4 +2221,176 @@ TEST_F(vfio_compat_mock_domain, huge_map) } } +FIXTURE(iommufd_device_pasid) +{ + int fd; + uint32_t ioas_id; + uint32_t hwpt_id; + uint32_t stdev_id; + uint32_t device_id; +}; + +FIXTURE_SETUP(iommufd_device_pasid) +{ + self->fd = open("/dev/iommu", O_RDWR); + ASSERT_NE(-1, self->fd); + test_ioctl_ioas_alloc(&self->ioas_id); + + test_cmd_mock_domain(self->ioas_id, &self->stdev_id, + &self->hwpt_id, &self->device_id); +} + +FIXTURE_TEARDOWN(iommufd_device_pasid) +{ + teardown_iommufd(self->fd, _metadata); +} + +TEST_F(iommufd_device_pasid, pasid_attach) +{ + if (self->device_id) { + struct iommu_hwpt_selftest data = { + .iotlb = IOMMU_TEST_IOTLB_DEFAULT, + }; + uint32_t nested_hwpt_id[2] = {}; + uint32_t parent_hwpt_id = 0; + uint32_t pasid = 100; + bool result; + + /* Allocate two nested hwpts sharing one common parent hwpt */ + test_cmd_hwpt_alloc(self->device_id, self->ioas_id, + IOMMU_HWPT_ALLOC_NEST_PARENT, + &parent_hwpt_id); + + test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id, 0, + &nested_hwpt_id[0], + IOMMU_HWPT_DATA_SELFTEST, + &data, sizeof(data)); + test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id, 0, + &nested_hwpt_id[1], + IOMMU_HWPT_DATA_SELFTEST, + &data, sizeof(data)); + + /* + * Attach ioas to pasid 100, should succeed, domain should + * be valid. + */ + test_cmd_pasid_attach(pasid, self->ioas_id); + ASSERT_EQ(0, + test_cmd_pasid_check_domain(self->fd, self->stdev_id, + pasid, self->hwpt_id, + &result)); + EXPECT_EQ(1, result); + + /* + * Try attach pasid 100 with self->ioas_id, should succeed + * as it is the same with existing hwpt. + */ + test_cmd_pasid_attach(pasid, self->ioas_id); + + /* + * Try attach pasid 100 with another hwpt, should FAIL + * as attach does not allow overwrite, use REPLACE instead. + */ + test_err_cmd_pasid_attach(EINVAL, pasid, nested_hwpt_id[0]); + + /* + * Detach hwpt from pasid 100, and check if the pasid 100 + * has null domain. Should be done before the next attach. + */ + test_cmd_pasid_detach(pasid); + ASSERT_EQ(0, + test_cmd_pasid_check_domain(self->fd, self->stdev_id, + pasid, 0, &result)); + EXPECT_EQ(1, result); + + /* + * Attach nested hwpt to pasid 100, should succeed, domain + * should be valid. + */ + test_cmd_pasid_attach(pasid, nested_hwpt_id[0]); + ASSERT_EQ(0, + test_cmd_pasid_check_domain(self->fd, self->stdev_id, + pasid, nested_hwpt_id[0], + &result)); + EXPECT_EQ(1, result); + + /* + * Detach hwpt from pasid 100, and check if the pasid 100 + * has null domain + */ + test_cmd_pasid_detach(pasid); + ASSERT_EQ(0, + test_cmd_pasid_check_domain(self->fd, self->stdev_id, + pasid, 0, &result)); + EXPECT_EQ(1, result); + + /* Replace tests */ + pasid = 200; + + /* + * Replace pasid 200 without attaching it first, should + * fail with -EINVAL. + */ + test_err_cmd_pasid_replace(EINVAL, pasid, parent_hwpt_id); + + /* + * Attach a s2 hwpt to pasid 200, should succeed, domain should + * be valid. + */ + test_cmd_pasid_attach(pasid, parent_hwpt_id); + ASSERT_EQ(0, + test_cmd_pasid_check_domain(self->fd, self->stdev_id, + pasid, parent_hwpt_id, + &result)); + EXPECT_EQ(1, result); + + /* + * Replace pasid 200 with self->ioas_id, should succeed, + * and have valid domain. + */ + test_cmd_pasid_replace(pasid, self->ioas_id); + ASSERT_EQ(0, + test_cmd_pasid_check_domain(self->fd, self->stdev_id, + pasid, self->hwpt_id, + &result)); + EXPECT_EQ(1, result); + + /* + * Replace a nested hwpt for pasid 200, should succeed, + * and have valid domain. + */ + test_cmd_pasid_replace(pasid, nested_hwpt_id[0]); + ASSERT_EQ(0, + test_cmd_pasid_check_domain(self->fd, self->stdev_id, + pasid, nested_hwpt_id[0], + &result)); + EXPECT_EQ(1, result); + + /* + * Replace with another nested hwpt for pasid 200, should + * succeed, and have valid domain. + */ + test_cmd_pasid_replace(pasid, nested_hwpt_id[1]); + ASSERT_EQ(0, + test_cmd_pasid_check_domain(self->fd, self->stdev_id, + pasid, nested_hwpt_id[1], + &result)); + EXPECT_EQ(1, result); + + /* + * Detach hwpt from pasid 200, and check if the pasid 200 + * has null domain. + */ + test_cmd_pasid_detach(pasid); + ASSERT_EQ(0, + test_cmd_pasid_check_domain(self->fd, self->stdev_id, + pasid, 0, &result)); + EXPECT_EQ(1, result); + + test_ioctl_destroy(nested_hwpt_id[0]); + test_ioctl_destroy(nested_hwpt_id[1]); + test_ioctl_destroy(parent_hwpt_id); + } +} + TEST_HARNESS_MAIN diff --git a/tools/testing/selftests/iommu/iommufd_fail_nth.c b/tools/testing/selftests/iommu/iommufd_fail_nth.c index f590417cd67a..6d1b03e73b9d 100644 --- a/tools/testing/selftests/iommu/iommufd_fail_nth.c +++ b/tools/testing/selftests/iommu/iommufd_fail_nth.c @@ -206,12 +206,16 @@ FIXTURE(basic_fail_nth) { int fd; uint32_t access_id; + uint32_t stdev_id; + uint32_t pasid; }; FIXTURE_SETUP(basic_fail_nth) { self->fd = -1; self->access_id = 0; + self->stdev_id = 0; + self->pasid = 0; //test should use a non-zero value } FIXTURE_TEARDOWN(basic_fail_nth) @@ -223,6 +227,8 @@ FIXTURE_TEARDOWN(basic_fail_nth) rc = _test_cmd_destroy_access(self->access_id); assert(rc == 0); } + if (self->pasid && self->stdev_id) + _test_cmd_pasid_detach(self->fd, self->stdev_id, self->pasid); teardown_iommufd(self->fd, _metadata); } @@ -579,7 +585,6 @@ TEST_FAIL_NTH(basic_fail_nth, device) struct iommu_test_hw_info info; uint32_t ioas_id; uint32_t ioas_id2; - uint32_t stdev_id; uint32_t idev_id; uint32_t hwpt_id; __u64 iova; @@ -608,7 +613,7 @@ TEST_FAIL_NTH(basic_fail_nth, device) fail_nth_enable(); - if (_test_cmd_mock_domain(self->fd, ioas_id, &stdev_id, NULL, + if (_test_cmd_mock_domain(self->fd, ioas_id, &self->stdev_id, NULL, &idev_id)) return -1; @@ -619,11 +624,26 @@ TEST_FAIL_NTH(basic_fail_nth, device) IOMMU_HWPT_DATA_NONE, 0, 0)) return -1; - if (_test_cmd_mock_domain_replace(self->fd, stdev_id, ioas_id2, NULL)) + if (_test_cmd_mock_domain_replace(self->fd, self->stdev_id, ioas_id2, NULL)) + return -1; + + if (_test_cmd_mock_domain_replace(self->fd, self->stdev_id, hwpt_id, NULL)) return -1; - if (_test_cmd_mock_domain_replace(self->fd, stdev_id, hwpt_id, NULL)) + self->pasid = 200; + + /* Tests for pasid attach/replace/detach */ + if (_test_cmd_pasid_attach(self->fd, self->stdev_id, self->pasid, ioas_id)) return -1; + + if (_test_cmd_pasid_replace(self->fd, self->stdev_id, self->pasid, ioas_id2)) + return -1; + + if (_test_cmd_pasid_detach(self->fd, self->stdev_id, self->pasid)) + return -1; + + self->pasid = 0; + return 0; } diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h index d4a169a2278e..890d622cde86 100644 --- a/tools/testing/selftests/iommu/iommufd_utils.h +++ b/tools/testing/selftests/iommu/iommufd_utils.h @@ -682,3 +682,81 @@ static int _test_cmd_get_hw_info(int fd, __u32 device_id, void *data, #define test_cmd_get_hw_capabilities(device_id, caps, mask) \ ASSERT_EQ(0, _test_cmd_get_hw_info(self->fd, device_id, NULL, 0, &caps)) + +static int _test_cmd_pasid_attach(int fd, __u32 stdev_id, __u32 pasid, __u32 pt_id) +{ + struct iommu_test_cmd test_attach = { + .size = sizeof(test_attach), + .op = IOMMU_TEST_OP_PASID_ATTACH, + .id = stdev_id, + .pasid_attach = { + .pasid = pasid, + .pt_id = pt_id, + }, + }; + + return ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_PASID_ATTACH), &test_attach); +} + +#define test_cmd_pasid_attach(pasid, hwpt_id) \ + ASSERT_EQ(0, _test_cmd_pasid_attach(self->fd, self->stdev_id, pasid, hwpt_id)) + +#define test_err_cmd_pasid_attach(_errno, pasid, hwpt_id) \ + EXPECT_ERRNO(_errno, \ + _test_cmd_pasid_attach(self->fd, self->stdev_id, pasid, hwpt_id)) + +static int _test_cmd_pasid_replace(int fd, __u32 stdev_id, __u32 pasid, __u32 pt_id) +{ + struct iommu_test_cmd test_replace = { + .size = sizeof(test_replace), + .op = IOMMU_TEST_OP_PASID_REPLACE, + .id = stdev_id, + .pasid_replace = { + .pasid = pasid, + .pt_id = pt_id, + }, + }; + + return ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_PASID_REPLACE), &test_replace); +} + +#define test_cmd_pasid_replace(pasid, hwpt_id) \ + ASSERT_EQ(0, _test_cmd_pasid_replace(self->fd, self->stdev_id, pasid, hwpt_id)) + +#define test_err_cmd_pasid_replace(_errno, pasid, hwpt_id) \ + EXPECT_ERRNO(_errno, \ + _test_cmd_pasid_replace(self->fd, self->stdev_id, pasid, hwpt_id)) + +static int _test_cmd_pasid_detach(int fd, __u32 stdev_id, __u32 pasid) +{ + struct iommu_test_cmd test_detach = { + .size = sizeof(test_detach), + .op = IOMMU_TEST_OP_PASID_DETACH, + .id = stdev_id, + .pasid_detach = { + .pasid = pasid, + }, + }; + + return ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_PASID_DETACH), &test_detach); +} + +#define test_cmd_pasid_detach(pasid) \ + ASSERT_EQ(0, _test_cmd_pasid_detach(self->fd, self->stdev_id, pasid)) + +static int test_cmd_pasid_check_domain(int fd, __u32 stdev_id, __u32 pasid, + __u32 hwpt_id, bool *result) +{ + struct iommu_test_cmd test_pasid_check = { + .size = sizeof(test_pasid_check), + .op = IOMMU_TEST_OP_PASID_CHECK_DOMAIN, + .id = stdev_id, + .pasid_check = { + .pasid = pasid, + .hwpt_id = hwpt_id, + .out_result_ptr = (__u64)result, + }, + }; + + return ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_PASID_CHECK_DOMAIN), &test_pasid_check); +} From patchwork Mon Nov 27 06:34:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13469178 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="WMOc+SeD" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 869AE134; 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a="838608958" X-IronPort-AV: E=Sophos;i="6.04,230,1695711600"; d="scan'208";a="838608958" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga004.fm.intel.com with ESMTP; 26 Nov 2023 22:34:43 -0800 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, xin.zeng@intel.com, yan.y.zhao@intel.com Subject: [PATCH 8/8] iommu/vt-d: Add set_dev_pasid callback for nested domain Date: Sun, 26 Nov 2023 22:34:28 -0800 Message-Id: <20231127063428.127436-9-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231127063428.127436-1-yi.l.liu@intel.com> References: <20231127063428.127436-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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. The set_dev_pasid callback for non-nest domain has already be there, so this only needs to add it for nested domains. 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 44ad48db7ea0..f6f687750104 100644 --- a/drivers/iommu/intel/nested.c +++ b/drivers/iommu/intel/nested.c @@ -68,6 +68,52 @@ 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)); @@ -128,6 +174,7 @@ 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, };