From patchwork Thu Oct 26 04:39:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 738557 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 B5DB3C25B72 for ; Thu, 26 Oct 2023 04:39:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343899AbjJZEj7 (ORCPT ); Thu, 26 Oct 2023 00:39:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55248 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233277AbjJZEjw (ORCPT ); Thu, 26 Oct 2023 00:39:52 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51D5F187; Wed, 25 Oct 2023 21:39:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698295189; x=1729831189; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=IeDxviyjqZ/WhAoucCjLp112bmR6If7O9m/jOTstSDc=; b=LmrLkeXRxrVJVQmCAYCIJBzz9FFRpDuXx446JR6ZH3J5k3/kfhpWTqyD RLC31YwkKaEYuioC7H4jKqBU7ufPRlaEJrVsvp17RPy1VmUQrfD1jwYpA LiEItvDKoQBy8ivpAG5oJK4gocStUt+Qa+G+kvj7uRVMQLJdIqpadGeKq bwHG8GKrN0WyOiLnix07DGcmDlt8GKZ+bjy2WPyPR1q+/DmK/AS54AraQ rbkqEP2hIpsX6AdEF7T12twgdL0qckitpqnGH4fvqxLrRu+jKZsm4eqr8 vmTZeos92L/swdD5/r9AH3LPjJm9FD2N1NB+JF+a/lUv+MI2S3rovAy96 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10874"; a="9014503" X-IronPort-AV: E=Sophos;i="6.03,252,1694761200"; d="scan'208";a="9014503" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Oct 2023 21:39:46 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10874"; a="708931315" X-IronPort-AV: E=Sophos;i="6.03,252,1694761200"; d="scan'208";a="708931315" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga003.jf.intel.com with ESMTP; 25 Oct 2023 21:39:44 -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, xin.zeng@intel.com Subject: [PATCH v7 05/10] iommufd: Share iommufd_hwpt_alloc with IOMMUFD_OBJ_HWPT_NESTED Date: Wed, 25 Oct 2023 21:39:33 -0700 Message-Id: <20231026043938.63898-6-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231026043938.63898-1-yi.l.liu@intel.com> References: <20231026043938.63898-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Nicolin Chen Allow iommufd_hwpt_alloc() to have a common routine but jump to different allocators corresponding to different user input pt_obj types, either an IOMMUFD_OBJ_IOAS for a PAGING hwpt or an IOMMUFD_OBJ_HWPT_PAGING as the parent for a NESTED hwpt. Also, move the "flags" validation to the hwpt allocator (paging), so that later the hwpt_nested allocator can do its own separate flags validation. Signed-off-by: Nicolin Chen Signed-off-by: Yi Liu Reviewed-by: Kevin Tian Reviewed-by: Jason Gunthorpe Signed-off-by: Jason Gunthorpe --- drivers/iommu/iommufd/hw_pagetable.c | 46 ++++++++++++++++++---------- 1 file changed, 29 insertions(+), 17 deletions(-) diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index 39b8b625b48d..6bce9af0cb8d 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -82,6 +82,8 @@ iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, struct iommufd_device *idev, u32 flags, bool immediate_attach) { + const u32 valid_flags = IOMMU_HWPT_ALLOC_NEST_PARENT | + IOMMU_HWPT_ALLOC_DIRTY_TRACKING; const struct iommu_ops *ops = dev_iommu_ops(idev->dev); struct iommufd_hwpt_paging *hwpt_paging; struct iommufd_hw_pagetable *hwpt; @@ -91,6 +93,8 @@ iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, if (flags && !ops->domain_alloc_user) return ERR_PTR(-EOPNOTSUPP); + if (flags & ~valid_flags) + return ERR_PTR(-EOPNOTSUPP); hwpt_paging = __iommufd_object_alloc( ictx, hwpt_paging, IOMMUFD_OBJ_HWPT_PAGING, common.obj); @@ -167,35 +171,41 @@ iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd) { struct iommu_hwpt_alloc *cmd = ucmd->cmd; - struct iommufd_hwpt_paging *hwpt_paging; struct iommufd_hw_pagetable *hwpt; + struct iommufd_ioas *ioas = NULL; + struct iommufd_object *pt_obj; struct iommufd_device *idev; - struct iommufd_ioas *ioas; int rc; - if ((cmd->flags & ~(IOMMU_HWPT_ALLOC_NEST_PARENT | - IOMMU_HWPT_ALLOC_DIRTY_TRACKING)) || - cmd->__reserved) + if (cmd->__reserved) return -EOPNOTSUPP; idev = iommufd_get_device(ucmd, cmd->dev_id); if (IS_ERR(idev)) return PTR_ERR(idev); - ioas = iommufd_get_ioas(ucmd->ictx, cmd->pt_id); - if (IS_ERR(ioas)) { - rc = PTR_ERR(ioas); + pt_obj = iommufd_get_object(ucmd->ictx, cmd->pt_id, IOMMUFD_OBJ_ANY); + if (IS_ERR(pt_obj)) { + rc = -EINVAL; goto out_put_idev; } - mutex_lock(&ioas->mutex); - hwpt_paging = iommufd_hwpt_paging_alloc(ucmd->ictx, ioas, idev, - cmd->flags, false); - if (IS_ERR(hwpt_paging)) { - rc = PTR_ERR(hwpt_paging); - goto out_unlock; + if (pt_obj->type == IOMMUFD_OBJ_IOAS) { + struct iommufd_hwpt_paging *hwpt_paging; + + ioas = container_of(pt_obj, struct iommufd_ioas, obj); + mutex_lock(&ioas->mutex); + hwpt_paging = iommufd_hwpt_paging_alloc(ucmd->ictx, ioas, idev, + cmd->flags, false); + if (IS_ERR(hwpt_paging)) { + rc = PTR_ERR(hwpt_paging); + goto out_unlock; + } + hwpt = &hwpt_paging->common; + } else { + rc = -EINVAL; + goto out_put_pt; } - hwpt = &hwpt_paging->common; cmd->out_hwpt_id = hwpt->obj.id; rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); @@ -207,8 +217,10 @@ int iommufd_hwpt_alloc(struct iommufd_ucmd *ucmd) out_hwpt: iommufd_object_abort_and_destroy(ucmd->ictx, &hwpt->obj); out_unlock: - mutex_unlock(&ioas->mutex); - iommufd_put_object(&ioas->obj); + if (ioas) + mutex_unlock(&ioas->mutex); +out_put_pt: + iommufd_put_object(pt_obj); out_put_idev: iommufd_put_object(&idev->obj); return rc;