From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 86D46642 for ; Thu, 11 May 2023 14:38:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1683815931; x=1715351931; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Ke4Q2tfTPA1F8lkmM3qM3tQXa//6Jv+EtDRXACRgOKk=; b=CTZEYr00d3JJ1FzJh8Zs3tzAA5yUhl3XN6/a2tEjk1gjfISzDCw9LChP gpcjNNo+3GcQ4omZvLZjFxxhmpzpHEXLiF5PCKRS95tNQcPh+iORDeZh2 m80jAMtv1W+n6gkwMpoeT17FJZ9BNIM5nYc+NUihkYsqE6UYNz2b17UMA boZjnTtzsNZz3gV9p0M0jMFBYvXny/I6jUQzrxrxvAOB0xQRDECmeqcDO bmjmb7FmYU1CIdDjkkvAwHru1yoMjd5Y3LFf3o88YWaJH51D1bWyFsg8V yXw1z8XlyAosEpHCmBwzie0iTjiSJUiq2rz1O2Y/AVaBonoPMG2hU2otT g==; X-IronPort-AV: E=McAfee;i="6600,9927,10707"; a="339812905" X-IronPort-AV: E=Sophos;i="5.99,266,1677571200"; d="scan'208";a="339812905" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 May 2023 07:38:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10707"; a="730382619" X-IronPort-AV: E=Sophos;i="5.99,266,1677571200"; d="scan'208";a="730382619" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga008.jf.intel.com with ESMTP; 11 May 2023 07:38:49 -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 Subject: [PATCH v2 05/11] iommufd/hw_pagetable: Do not populate user-managed hw_pagetables Date: Thu, 11 May 2023 07:38:38 -0700 Message-Id: <20230511143844.22693-6-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230511143844.22693-1-yi.l.liu@intel.com> References: <20230511143844.22693-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Nicolin Chen A user-managed hw_pagetable does not need to get populated, since it is managed by a guest OS. Move the iopt_table_add_domain and list_add_tail calls into a helper, where the hwpt pointer will be redirected to its hwpt->parent if it's available. Signed-off-by: Nicolin Chen Signed-off-by: Yi Liu --- drivers/iommu/iommufd/hw_pagetable.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/iommufd/hw_pagetable.c b/drivers/iommu/iommufd/hw_pagetable.c index ec9b140939ce..73d7d9d07726 100644 --- a/drivers/iommu/iommufd/hw_pagetable.c +++ b/drivers/iommu/iommufd/hw_pagetable.c @@ -58,6 +58,24 @@ int iommufd_hw_pagetable_enforce_cc(struct iommufd_hw_pagetable *hwpt) return 0; } +static int iommufd_hw_pagetable_link_ioas(struct iommufd_hw_pagetable *hwpt) +{ + int rc; + + /* + * Only a parent hwpt needs to be linked to the IOAS. And a hwpt->parent + * must be linked to the IOAS already, when it's being allocated. + */ + if (hwpt->parent) + return 0; + + rc = iopt_table_add_domain(&hwpt->ioas->iopt, hwpt->domain); + if (rc) + return rc; + list_add_tail(&hwpt->hwpt_item, &hwpt->ioas->hwpt_list); + return 0; +} + /** * iommufd_hw_pagetable_alloc() - Get an iommu_domain for a device * @ictx: iommufd context @@ -151,10 +169,9 @@ iommufd_hw_pagetable_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas, goto out_abort; } - rc = iopt_table_add_domain(&hwpt->ioas->iopt, hwpt->domain); + rc = iommufd_hw_pagetable_link_ioas(hwpt); if (rc) goto out_detach; - list_add_tail(&hwpt->hwpt_item, &hwpt->ioas->hwpt_list); return hwpt; out_detach: -- 2.34.1