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=-10.0 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 1EFA6C433E0 for ; Wed, 1 Jul 2020 01:05:24 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 0348D20771 for ; Wed, 1 Jul 2020 01:05:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0348D20771 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=amd-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0680E6E5A9; Wed, 1 Jul 2020 01:05:19 +0000 (UTC) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0A8FC6E045 for ; Tue, 30 Jun 2020 23:45:20 +0000 (UTC) IronPort-SDR: g5bQyz7LyB+TIUWKN/3HysfstDHpLqjpOYsZHVtNap3JGl0MssgQqiEUYljUgAwLgz7KMwNNwN Zwo9JtcW7UVA== X-IronPort-AV: E=McAfee;i="6000,8403,9668"; a="147962833" X-IronPort-AV: E=Sophos;i="5.75,298,1589266800"; d="scan'208";a="147962833" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jun 2020 16:45:19 -0700 IronPort-SDR: AN7qYKkRVk/ouTSW9BJbG0hGRsv0xDPT8Ua5LCWaSHlTuNihdk6tL0AkzFY/482mgX+r5FCAwf wTJMklFeWAmg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,298,1589266800"; d="scan'208";a="386842579" Received: from romley-ivt3.sc.intel.com ([172.25.110.60]) by fmsmga001.fm.intel.com with ESMTP; 30 Jun 2020 16:44:54 -0700 From: Fenghua Yu To: "Thomas Gleixner" , "Joerg Roedel" , "Ingo Molnar" , "Borislav Petkov" , "Peter Zijlstra" , "H Peter Anvin" , "David Woodhouse" , "Lu Baolu" , "Felix Kuehling" , "Dave Hansen" , "Tony Luck" , "Jean-Philippe Brucker" , "Christoph Hellwig" , "Ashok Raj" , "Jacob Jun Pan" , "Dave Jiang" , "Sohil Mehta" , "Ravi V Shankar" Subject: [PATCH v5 11/12] sched: Define and initialize a flag to identify valid PASID in the task Date: Tue, 30 Jun 2020 16:44:41 -0700 Message-Id: <1593560682-40814-12-git-send-email-fenghua.yu@intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1593560682-40814-1-git-send-email-fenghua.yu@intel.com> References: <1593560682-40814-1-git-send-email-fenghua.yu@intel.com> X-Mailman-Approved-At: Wed, 01 Jul 2020 01:05:10 +0000 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fenghua Yu , iommu@lists.linux-foundation.org, x86 , linux-kernel , amd-gfx MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" 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 692e327d7455..042d6f5cde6a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -800,6 +800,9 @@ 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 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx