From patchwork Sat May 13 13:21:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13240175 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 76864C7EE23 for ; Sat, 13 May 2023 13:21:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238612AbjEMNV4 (ORCPT ); Sat, 13 May 2023 09:21:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238316AbjEMNVv (ORCPT ); Sat, 13 May 2023 09:21:51 -0400 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 41D251FED; Sat, 13 May 2023 06:21:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1683984110; x=1715520110; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=JPKn3Comiif0UnOhEse9L3Rl82bLgc6qyUnZga0nLkQ=; b=AV6IdomyiFr60Hr4OW9BxXUccV3qquY4ciLWVGHpGElb6DZhbI4WeuOP wNbRYJeHKPJSfyKr6AqDsZYJgkXjGC/plhjwgjH4Y3njoeI8dl9ffpsty vZIuSeaIMB2/Ol3Mz+0rw0dVd4mi+BRkBfSLvfhJT4NQn5J26SKR0XOTf f8zSykzMHnbHYE2YLP2imJzSwt3DE24Fg31iUNe4vMTt5SNOi6nzmcGdp jsmhWrrCYDBryMFskGbmMiYSgmzG7wiHmLKrwDE7LTrwCFDVNOnldu9kU 05Gp/rJEu+RkyANjkRpqIsIHSppHm5Z4n6rEB5G0WegAO7LuLlUme8tVD A==; X-IronPort-AV: E=McAfee;i="6600,9927,10708"; a="416599028" X-IronPort-AV: E=Sophos;i="5.99,272,1677571200"; d="scan'208";a="416599028" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 May 2023 06:21:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10708"; a="790126468" X-IronPort-AV: E=Sophos;i="5.99,272,1677571200"; d="scan'208";a="790126468" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by FMSMGA003.fm.intel.com with ESMTP; 13 May 2023 06:21:48 -0700 From: Yi Liu To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com Cc: joro@8bytes.org, robin.murphy@arm.com, 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, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-s390@vger.kernel.org, xudong.hao@intel.com, yan.y.zhao@intel.com, terrence.xu@intel.com, yanting.jiang@intel.com, zhenzhong.duan@intel.com, clegoate@redhat.com Subject: [PATCH v5 08/10] iommufd: Add iommufd_ctx_has_group() Date: Sat, 13 May 2023 06:21:34 -0700 Message-Id: <20230513132136.15021-9-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230513132136.15021-1-yi.l.liu@intel.com> References: <20230513132136.15021-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org to check if any device within the given iommu_group has been bound with the iommufd_ctx. This helpful for the checking on device ownership for the devices which have been bound but cannot be bound to any other iommufd as the iommu_group has been bound. Signed-off-by: Yi Liu --- drivers/iommu/iommufd/device.c | 29 +++++++++++++++++++++++++++++ include/linux/iommufd.h | 8 ++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index 81466b97023f..5e5f7912807b 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -98,6 +98,35 @@ struct iommufd_device *iommufd_device_bind(struct iommufd_ctx *ictx, } EXPORT_SYMBOL_NS_GPL(iommufd_device_bind, IOMMUFD); +/** + * iommufd_ctx_has_group - True if the struct device is bound to this ictx + * @ictx: iommufd file descriptor + * @group: Pointer to a physical iommu_group struct + * + * True if a iommufd_device_bind() is present for any device within the + * group. + */ +bool iommufd_ctx_has_group(struct iommufd_ctx *ictx, struct iommu_group *group) +{ + struct iommufd_object *obj; + unsigned long index; + + if (!ictx || !group) + return false; + + xa_lock(&ictx->objects); + xa_for_each(&ictx->objects, index, obj) { + if (obj->type == IOMMUFD_OBJ_DEVICE && + container_of(obj, struct iommufd_device, obj)->group == group) { + xa_unlock(&ictx->objects); + return true; + } + } + xa_unlock(&ictx->objects); + return false; +} +EXPORT_SYMBOL_NS_GPL(iommufd_ctx_has_group, IOMMUFD); + /** * iommufd_device_unbind - Undo iommufd_device_bind() * @idev: Device returned by iommufd_device_bind() diff --git a/include/linux/iommufd.h b/include/linux/iommufd.h index 68cd65274e28..e49c16cd6831 100644 --- a/include/linux/iommufd.h +++ b/include/linux/iommufd.h @@ -16,6 +16,7 @@ struct page; struct iommufd_ctx; struct iommufd_access; struct file; +struct iommu_group; struct iommufd_device *iommufd_device_bind(struct iommufd_ctx *ictx, struct device *dev, u32 *id); @@ -56,6 +57,7 @@ void iommufd_ctx_get(struct iommufd_ctx *ictx); #if IS_ENABLED(CONFIG_IOMMUFD) struct iommufd_ctx *iommufd_ctx_from_file(struct file *file); void iommufd_ctx_put(struct iommufd_ctx *ictx); +bool iommufd_ctx_has_group(struct iommufd_ctx *ictx, struct iommu_group *group); int iommufd_access_pin_pages(struct iommufd_access *access, unsigned long iova, unsigned long length, struct page **out_pages, @@ -77,6 +79,12 @@ static inline void iommufd_ctx_put(struct iommufd_ctx *ictx) { } +static inline bool iommufd_ctx_has_group(struct iommufd_ctx *ictx, + struct iommu_group *group) +{ + return false; +} + static inline int iommufd_access_pin_pages(struct iommufd_access *access, unsigned long iova, unsigned long length,