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=-9.7 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 21CE1C433E0 for ; Sat, 13 Jun 2020 00:42:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0944C2078A for ; Sat, 13 Jun 2020 00:42:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726615AbgFMAmb (ORCPT ); Fri, 12 Jun 2020 20:42:31 -0400 Received: from mga12.intel.com ([192.55.52.136]:1255 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726455AbgFMAlx (ORCPT ); Fri, 12 Jun 2020 20:41:53 -0400 IronPort-SDR: 34ZjVntc9J+UzRTu199GGJSjDq5lMWPNnPWe7FohRj5vErcqdW4i1KPm7QQ/aJAAfWLdWEtKlp yxAjjoeQai4A== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga106.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" Cc: "linux-kernel" , "x86" , iommu@lists.linux-foundation.org, "amd-gfx" , "linuxppc-dev" , Fenghua Yu 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> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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