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, 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 07C31C32764 for ; Thu, 2 Jan 2020 00:19:47 +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 DA0EF20672 for ; Thu, 2 Jan 2020 00:19:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DA0EF20672 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 C97FE86072; Thu, 2 Jan 2020 00:19:46 +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 dmU6Pnu50miz; Thu, 2 Jan 2020 00:19:44 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id D4744854C0; Thu, 2 Jan 2020 00:19:44 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id BEB88C1D85; Thu, 2 Jan 2020 00:19:44 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id F316CC077D for ; Thu, 2 Jan 2020 00:19:42 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id EFB3D85F53 for ; Thu, 2 Jan 2020 00:19:42 +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 W-I2IUHAmmqP for ; Thu, 2 Jan 2020 00:19:40 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by whitealder.osuosl.org (Postfix) with ESMTPS id D257385F37 for ; Thu, 2 Jan 2020 00:19:40 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Jan 2020 16:19:40 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,384,1571727600"; d="scan'208";a="244475913" Received: from allen-box.sh.intel.com ([10.239.159.136]) by fmsmga004.fm.intel.com with ESMTP; 01 Jan 2020 16:19:39 -0800 From: Lu Baolu To: Joerg Roedel Subject: [PATCH 08/22] iommu/vt-d: Avoid sending invalid page response Date: Thu, 2 Jan 2020 08:18:09 +0800 Message-Id: <20200102001823.21976-9-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200102001823.21976-1-baolu.lu@linux.intel.com> References: <20200102001823.21976-1-baolu.lu@linux.intel.com> Cc: iommu@lists.linux-foundation.org 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: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" From: Jacob Pan Page responses should only be sent when last page in group (LPIG) or private data is present in the page request. This patch avoids sending invalid descriptors. Fixes: 5d308fc1ecf53 ("iommu/vt-d: Add 256-bit invalidation descriptor support") Signed-off-by: Jacob Pan Reviewed-by: Eric Auger Signed-off-by: Lu Baolu --- drivers/iommu/intel-svm.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c index f0410e29fbc1..7c6a6e8b1c96 100644 --- a/drivers/iommu/intel-svm.c +++ b/drivers/iommu/intel-svm.c @@ -679,11 +679,10 @@ static irqreturn_t prq_event_thread(int irq, void *d) if (req->priv_data_present) memcpy(&resp.qw2, req->priv_data, sizeof(req->priv_data)); + resp.qw2 = 0; + resp.qw3 = 0; + qi_submit_sync(&resp, iommu); } - resp.qw2 = 0; - resp.qw3 = 0; - qi_submit_sync(&resp, iommu); - head = (head + sizeof(*req)) & PRQ_RING_MASK; } -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu