From patchwork Fri Oct 20 09:19:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13430347 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 79D68CDB47E for ; Fri, 20 Oct 2023 09:20:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376722AbjJTJUW (ORCPT ); Fri, 20 Oct 2023 05:20:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376656AbjJTJUS (ORCPT ); Fri, 20 Oct 2023 05:20:18 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ABE49D6F; Fri, 20 Oct 2023 02:20:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697793603; x=1729329603; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=f3ChlmDgc3Aoc0IRtb5mlD1+NYbTx+ovRakpUdpzvbk=; b=b/bO1dHbYRTWQFL2+fTH6Uy0eKdnpTCWdogH96kyWOCaK7l4lsHhw2s5 gf8kAHZECmTvnwNYg2IFsmwGc+jmsxM57zN0zvLoh9GTcNehDJkx+D90+ S4ZT5rChHm3ts28+0IHRnOa0hsNshJHwo9F39UtAh7XfyXB3BhR+1Qxwf X8E8AYLLAm/pae4h3mvaBLl2ofsRhMu7gXph2d6JHsh/MKYcyzwiil0O1 qCZ8t7eUy/LtBVIOmcvlrqP1sMDOeWj9GQtM8lhawBjRXIAKptkhok2Z7 FKQl8sXRCIKGP87SyIjYd1ZS0GMbrxdyO4+IBDzkQcP2lJ1vmpCJDjg8V w==; X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="366693413" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="366693413" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2023 02:20:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="707179463" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="707179463" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga003.jf.intel.com with ESMTP; 20 Oct 2023 02:20:01 -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 v5 06/10] iommufd: Share iommufd_hwpt_alloc with IOMMUFD_OBJ_HWPT_NESTED Date: Fri, 20 Oct 2023 02:19:42 -0700 Message-Id: <20231020091946.12173-7-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231020091946.12173-1-yi.l.liu@intel.com> References: <20231020091946.12173-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@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 --- drivers/iommu/iommufd/hw_pagetable.c | 43 ++++++++++++++++++---------- 1 file changed, 28 insertions(+), 15 deletions(-) diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index 52df5b2bb329..24cd84a5fe8f 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -81,6 +81,7 @@ 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; const struct iommu_ops *ops = dev_iommu_ops(idev->dev); struct iommufd_hwpt_paging *hwpt_paging; struct iommufd_hw_pagetable *hwpt; @@ -90,6 +91,8 @@ 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, @@ -161,33 +164,41 @@ 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)) || 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)); @@ -199,8 +210,10 @@ 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;