From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CEDC9C432C3 for ; Fri, 15 Nov 2019 23:05:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B398A206D6 for ; Fri, 15 Nov 2019 23:05:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727354AbfKOXFO (ORCPT ); Fri, 15 Nov 2019 18:05:14 -0500 Received: from mga03.intel.com ([134.134.136.65]:52455 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726984AbfKOXFG (ORCPT ); Fri, 15 Nov 2019 18:05:06 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Nov 2019 15:05:05 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,309,1569308400"; d="scan'208";a="217240210" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga002.jf.intel.com with ESMTP; 15 Nov 2019 15:05:05 -0800 From: Jacob Pan To: iommu@lists.linux-foundation.org, LKML , Joerg Roedel , "Lu Baolu" , David Woodhouse Cc: "Tian, Kevin" , Raj Ashok , "Yi Liu" , Eric Auger , Jacob Pan Subject: [PATCH 03/10] iommu/vt-d: Reject SVM bind for failed capability check Date: Fri, 15 Nov 2019 15:09:30 -0800 Message-Id: <1573859377-75924-4-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1573859377-75924-1-git-send-email-jacob.jun.pan@linux.intel.com> References: <1573859377-75924-1-git-send-email-jacob.jun.pan@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a check during SVM bind to ensure CPU and IOMMU hardware capabilities are met. Signed-off-by: Jacob Pan --- drivers/iommu/intel-svm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index e9773d714862..924a4de84be1 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -238,6 +238,9 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ if (!iommu || dmar_disabled) return -EINVAL; + if (!intel_svm_capable(iommu)) + return -ENOTSUPP; + if (dev_is_pci(dev)) { pasid_max = pci_max_pasids(to_pci_dev(dev)); if (pasid_max < 0) -- 2.7.4