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=-8.5 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_SANE_1 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 BFECCC433E0 for ; Thu, 25 Jun 2020 10:06:01 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9177720773 for ; Thu, 25 Jun 2020 10:06:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9177720773 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 5D9A087898; Thu, 25 Jun 2020 10:06:01 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 75o4IOS+5vbZ; Thu, 25 Jun 2020 10:05:59 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 49244877E1; Thu, 25 Jun 2020 10:05:59 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 22C1DC0863; Thu, 25 Jun 2020 10:05:59 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id AF0BCC016F for ; Thu, 25 Jun 2020 10:05:57 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 96E8B230FD for ; Thu, 25 Jun 2020 10:05:57 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mYkZIX5YkSc3 for ; Thu, 25 Jun 2020 10:05:56 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by silver.osuosl.org (Postfix) with ESMTPS id D00E62306F for ; Thu, 25 Jun 2020 10:05:56 +0000 (UTC) IronPort-SDR: b3ZKZLsuQo9NMoTmSOWorAx2yNPRi7fWBiUAQvaLJZlUFbtSRfAUPwp0AgQgap/1/+zm4vqIgK JjN3Sse5T3mg== X-IronPort-AV: E=McAfee;i="6000,8403,9662"; a="206359330" X-IronPort-AV: E=Sophos;i="5.75,278,1589266800"; d="scan'208";a="206359330" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jun 2020 03:05:56 -0700 IronPort-SDR: c+Co+VmB1WTtrlI6kcp0N8A7BmK4d8S1lQJbB+I9/YDZ6Kp89MC7d5jze3qGxeuGGoWNakeL7F KQtz8k/Qi/Vg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,278,1589266800"; d="scan'208";a="263886455" Received: from blu2-mobl3.ccr.corp.intel.com (HELO [10.255.28.52]) ([10.255.28.52]) by fmsmga007.fm.intel.com with ESMTP; 25 Jun 2020 03:05:53 -0700 Subject: Re: [PATCH 4/7] iommu/vt-d: Handle non-page aligned address To: Jacob Pan , iommu@lists.linux-foundation.org, LKML , Joerg Roedel , David Woodhouse References: <1592926996-47914-1-git-send-email-jacob.jun.pan@linux.intel.com> <1592926996-47914-5-git-send-email-jacob.jun.pan@linux.intel.com> From: Lu Baolu Message-ID: <037cb7cf-1336-f546-7f45-c35caf19930f@linux.intel.com> Date: Thu, 25 Jun 2020 18:05:52 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <1592926996-47914-5-git-send-email-jacob.jun.pan@linux.intel.com> Content-Language: en-US Cc: "Tian, Kevin" , Raj Ashok X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi, On 2020/6/23 23:43, Jacob Pan wrote: > 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. > > Signed-off-by: Liu Yi L > Signed-off-by: Jacob Pan > --- > drivers/iommu/intel/dmar.c | 19 +++++++++++++++++-- > 1 file changed, 17 insertions(+), 2 deletions(-) > > diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c > index d9f973fa1190..53f4e5003620 100644 > --- a/drivers/iommu/intel/dmar.c > +++ b/drivers/iommu/intel/dmar.c > @@ -1455,9 +1455,24 @@ 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); > + > + if (size_order) { > + /* Take page address */ > + desc.qw1 |= QI_DEV_EIOTLB_ADDR(addr); If size_order == 0 (that means only a single page is about to be invalidated), do you still need to set ADDR field of the descriptor? Best regards, baolu > + /* > + * 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); > } > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu