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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 BAC81C433DF for ; Fri, 26 Jun 2020 08:05:52 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 9A8FC2082E for ; Fri, 26 Jun 2020 08:05:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A8FC2082E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 7DA2786BC4; Fri, 26 Jun 2020 08:05:52 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id evC8fs6Xq6vD; Fri, 26 Jun 2020 08:05:52 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 0203986C2D; Fri, 26 Jun 2020 08:05:52 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D7E60C08A0; Fri, 26 Jun 2020 08:05:51 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 17902C016F for ; Fri, 26 Jun 2020 08:05:51 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 0583D86538 for ; Fri, 26 Jun 2020 08:05:51 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id B7UFC8m4LmzO for ; Fri, 26 Jun 2020 08:05:50 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by fraxinus.osuosl.org (Postfix) with ESMTPS id 1AF9586447 for ; Fri, 26 Jun 2020 08:05:50 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 55391451; Fri, 26 Jun 2020 10:05:48 +0200 (CEST) From: Joerg Roedel To: Joerg Roedel Subject: [PATCH v2 0/2] iommu/amd: Don't use atomic64_t for domain->pt_root Date: Fri, 26 Jun 2020 10:05:45 +0200 Message-Id: <20200626080547.24865-1-joro@8bytes.org> X-Mailer: git-send-email 2.17.1 Cc: iommu@lists.linux-foundation.org, Joerg Roedel , linux-kernel@vger.kernel.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: Joerg Roedel Hi, a previous discussion pointed out that using atomic64_t for that purpose is a bit of overkill. This patch-set replaces it with unsigned long and introduces some helpers first to make the change more easy. Qian, can you please test these patches in your environment? You can trigger any race-condition there pretty reliably :) Other than that, please review and test. Regards, Joerg Changed to v1: - Addressed review comments from Qian. Joerg Roedel (2): iommu/amd: Add helper functions to update domain->pt_root iommu/amd: Use 'unsigned long' for domain->pt_root drivers/iommu/amd/amd_iommu_types.h | 2 +- drivers/iommu/amd/iommu.c | 44 +++++++++++++++++++++-------- 2 files changed, 33 insertions(+), 13 deletions(-) -- 2.27.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu