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=-10.0 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 1AB26C433DF for ; Wed, 1 Jul 2020 15:27:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EDE0720760 for ; Wed, 1 Jul 2020 15:27:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732039AbgGAP1c (ORCPT ); Wed, 1 Jul 2020 11:27:32 -0400 Received: from mga17.intel.com ([192.55.52.151]:54845 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732020AbgGAP11 (ORCPT ); Wed, 1 Jul 2020 11:27:27 -0400 IronPort-SDR: e+l5XVcHnigrybTT5CrhRLaOvspNfkBo8nJePwZ1hhhaQfB+NgkouXXHF8UNvxEiWV2tYYeF00 43XhSJugr+9Q== X-IronPort-AV: E=McAfee;i="6000,8403,9668"; a="126699720" X-IronPort-AV: E=Sophos;i="5.75,300,1589266800"; d="scan'208";a="126699720" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jul 2020 08:27:23 -0700 IronPort-SDR: GxdWpZ0Y0N+xwpRynhx+NrXdSsENAkVY3eb84chB8hIF7ZSPq6sX5tk1chxg1x/GIet7ja0GFh ExjsjVwOhy/w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,300,1589266800"; d="scan'208";a="295591650" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga002.jf.intel.com with ESMTP; 01 Jul 2020 08:27:22 -0700 From: Jacob Pan To: iommu@lists.linux-foundation.org, LKML , "Lu Baolu" , Joerg Roedel , David Woodhouse Cc: Yi Liu , "Tian, Kevin" , Raj Ashok , Eric Auger , Jacob Pan Subject: [PATCH v3 4/7] iommu/vt-d: Handle non-page aligned address Date: Wed, 1 Jul 2020 08:33:53 -0700 Message-Id: <1593617636-79385-5-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1593617636-79385-1-git-send-email-jacob.jun.pan@linux.intel.com> References: <1593617636-79385-1-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 From: Liu Yi L Address information for device TLB invalidation comes from userspace when device is directly assigned to a guest with vIOMMU support. VT-d requires page aligned address. This patch checks and enforce address to be page aligned, otherwise reserved bits can be set in the invalidation descriptor. Unrecoverable fault will be reported due to non-zero value in the reserved bits. Fixes: 61a06a16e36d8 ("iommu/vt-d: Support flushing more translation cache types") Acked-by: Lu Baolu Signed-off-by: Liu Yi L Signed-off-by: Jacob Pan Signed-off-by: Jacob Pan --- drivers/iommu/intel/dmar.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c index d9f973fa1190..3899f3161071 100644 --- a/drivers/iommu/intel/dmar.c +++ b/drivers/iommu/intel/dmar.c @@ -1455,9 +1455,25 @@ void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu, u16 sid, u16 pfsid, * Max Invs Pending (MIP) is set to 0 for now until we have DIT in * ECAP. */ - desc.qw1 |= addr & ~mask; - if (size_order) + if (addr & ~VTD_PAGE_MASK) + pr_warn_ratelimited("Invalidate non-page aligned address %llx\n", addr); + + /* Take page address */ + desc.qw1 |= QI_DEV_EIOTLB_ADDR(addr); + + if (size_order) { + /* + * Existing 0s in address below size_order may be the least + * significant bit, we must set them to 1s to avoid having + * smaller size than desired. + */ + desc.qw1 |= GENMASK_ULL(size_order + VTD_PAGE_SHIFT, + VTD_PAGE_SHIFT); + /* Clear size_order bit to indicate size */ + desc.qw1 &= ~mask; + /* Set the S bit to indicate flushing more than 1 page */ desc.qw1 |= QI_DEV_EIOTLB_SIZE; + } qi_submit_sync(iommu, &desc, 1, 0); } -- 2.7.4