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 3FC39C433E1 for ; Wed, 17 Jun 2020 18:24:28 +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 1CB5D217BA for ; Wed, 17 Jun 2020 18:24:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1CB5D217BA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=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 DEED487BE3; Wed, 17 Jun 2020 18:24:27 +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 R1K62bu41OBH; Wed, 17 Jun 2020 18:24:27 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 4967B87C49; Wed, 17 Jun 2020 18:24:27 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 33393C0863; Wed, 17 Jun 2020 18:24:27 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 76FB1C016E for ; Wed, 17 Jun 2020 18:24:23 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 5DDA520767 for ; Wed, 17 Jun 2020 18:24:23 +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 t-2D4HTiqvZT for ; Wed, 17 Jun 2020 18:24:19 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by silver.osuosl.org (Postfix) with ESMTPS id 4CB4A2150A for ; Wed, 17 Jun 2020 18:24:19 +0000 (UTC) IronPort-SDR: cBehhEkb15Qfi3BgHzos8vXv3FrwIgo7I/1sqQY4wSUN8YBJRCXfUSuokyZjr0kZP6uSA7rc4x vkK4BWSvONWQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Jun 2020 11:24:18 -0700 IronPort-SDR: lL/BToVjMpD1fUwWCLQRcQZO8S1gXAr5ZsBvwjVGCYbg1/4SpfczDkBipwS7B/5qB3w69Ru/Mh XGG8rWQvjFMQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,523,1583222400"; d="scan'208";a="308874192" Received: from romley-ivt3.sc.intel.com ([172.25.110.60]) by orsmga008.jf.intel.com with ESMTP; 17 Jun 2020 11:24:18 -0700 From: Fenghua Yu To: "Thomas Gleixner" , "Ingo Molnar" , "Borislav Petkov" , "Peter Zijlstra" , "H Peter Anvin" , "David Woodhouse" , "Lu Baolu" , "Dave Hansen" , "Tony Luck" , "Jean-Philippe Brucker" , "Christoph Hellwig" , "Ashok Raj" , "Jacob Jun Pan" , "Dave Jiang" , "Sohil Mehta" , "Ravi V Shankar" Subject: [PATCH v3 12/13] sched: Define and initialize a flag to identify valid PASID in the task Date: Wed, 17 Jun 2020 11:23:52 -0700 Message-Id: <1592418233-17762-13-git-send-email-fenghua.yu@intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1592418233-17762-1-git-send-email-fenghua.yu@intel.com> References: <1592418233-17762-1-git-send-email-fenghua.yu@intel.com> Cc: Fenghua Yu , iommu@lists.linux-foundation.org, x86 , linux-kernel 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: Peter Zijlstra The flag is defined for the task to identify if the task has a valid PASID. Its initial value is 0 when the task is forked/cloned. It will be used shortly. Signed-off-by: Peter Zijlstra Co-developed-by: Fenghua Yu Signed-off-by: Fenghua Yu --- v2: - Add this patch to define the flag to identify valid PASID MSR (PeterZ) include/linux/sched.h | 3 +++ kernel/fork.c | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/include/linux/sched.h b/include/linux/sched.h index b62e6aaf28f0..1b5a6e5c74ca 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -801,6 +801,9 @@ struct task_struct { /* Stalled due to lack of memory */ unsigned in_memstall:1; #endif +#ifdef CONFIG_IOMMU_SUPPORT + unsigned has_valid_pasid:1; +#endif unsigned long atomic_flags; /* Flags requiring atomic access. */ diff --git a/kernel/fork.c b/kernel/fork.c index 43b5f112604d..0a962bebdf88 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -955,6 +955,10 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) tsk->use_memdelay = 0; #endif +#ifdef CONFIG_IOMMU_SUPPORT + tsk->has_valid_pasid = 0; +#endif + #ifdef CONFIG_MEMCG tsk->active_memcg = NULL; #endif -- 2.19.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu