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=unavailable 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 91E2FC433E0 for ; Sat, 13 Jun 2020 01:13:34 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 2C27F206D7 for ; Sat, 13 Jun 2020 01:13:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C27F206D7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 49kKNX43nCzDqKs for ; Sat, 13 Jun 2020 11:13:32 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=intel.com (client-ip=192.55.52.151; helo=mga17.intel.com; envelope-from=fenghua.yu@intel.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=intel.com Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 49kJhF0cRyzDqw6 for ; Sat, 13 Jun 2020 10:42:04 +1000 (AEST) IronPort-SDR: XVE9eixf6erD1lCiOHSOJys5M3DP4Dn/7dizpmesuRRJ61QleiWtjr7b3B9GoN5JttrPWHQetp DjtraY3Pv7hA== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jun 2020 17:41:52 -0700 IronPort-SDR: BiFZdLQU/2ZsAJaAhFSUIxQzESoPLxP778H5G1z+nD1VLagLl5+itUKiQIO/7L5DmXTImtazEQ f+Sqx7eaG2Bg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,505,1583222400"; d="scan'208";a="261011226" Received: from romley-ivt3.sc.intel.com ([172.25.110.60]) by orsmga007.jf.intel.com with ESMTP; 12 Jun 2020 17:41:52 -0700 From: Fenghua Yu To: "Thomas Gleixner" , "Ingo Molnar" , "Borislav Petkov" , "H Peter Anvin" , "David Woodhouse" , "Lu Baolu" , "Frederic Barrat" , "Andrew Donnellan" , "Felix Kuehling" , "Joerg Roedel" , "Dave Hansen" , "Tony Luck" , "Ashok Raj" , "Jacob Jun Pan" , "Dave Jiang" , "Yu-cheng Yu" , "Sohil Mehta" , "Ravi V Shankar" Subject: [PATCH v2 08/12] mm: Define pasid in mm Date: Fri, 12 Jun 2020 17:41:29 -0700 Message-Id: <1592008893-9388-9-git-send-email-fenghua.yu@intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1592008893-9388-1-git-send-email-fenghua.yu@intel.com> References: <1592008893-9388-1-git-send-email-fenghua.yu@intel.com> X-Mailman-Approved-At: Sat, 13 Jun 2020 10:59:17 +1000 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fenghua Yu , x86 , linux-kernel , amd-gfx , iommu@lists.linux-foundation.org, linuxppc-dev Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" PASID is shared by all threads in a process. So the logical place to keep track of it is in the "mm". Both ARM and X86 need to use the PASID in the "mm". Suggested-by: Christoph Hellwig Signed-off-by: Fenghua Yu Reviewed-by: Tony Luck --- v2: - This new patch moves "pasid" from x86 specific mm_context_t to generic struct mm_struct per Christopher's comment: https://lore.kernel.org/linux-iommu/20200414170252.714402-1-jean-philippe@linaro.org/T/#mb57110ffe1aaa24750eeea4f93b611f0d1913911 - Jean-Philippe Brucker released a virtually same patch. I still put this patch in the series for better review. The upstream kernel only needs one of the two patches eventually. https://lore.kernel.org/linux-iommu/20200519175502.2504091-2-jean-philippe@linaro.org/ - Change CONFIG_IOASID to CONFIG_PCI_PASID (Ashok) include/linux/mm_types.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 64ede5f150dc..5778db3aa42d 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -538,6 +538,10 @@ struct mm_struct { atomic_long_t hugetlb_usage; #endif struct work_struct async_put_work; + +#ifdef CONFIG_PCI_PASID + unsigned int pasid; +#endif } __randomize_layout; /* -- 2.19.1