From patchwork Tue Oct 17 03:20:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhang, Tina" X-Patchwork-Id: 13424394 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97E22CDB465 for ; Tue, 17 Oct 2023 03:22:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234528AbjJQDV7 (ORCPT ); Mon, 16 Oct 2023 23:21:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40572 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234339AbjJQDVf (ORCPT ); Mon, 16 Oct 2023 23:21:35 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 752FB12E; Mon, 16 Oct 2023 20:21:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697512886; x=1729048886; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ZhmxoShuHLiM8DBi/fzm6G4kHK6SDXHp234E7569BMQ=; b=VYd9GTkwakgTet/PqtlaCUawQ9FLonUV23Us/ZTUMO8PyQh16q6YO2V5 C1VV9OoUORl8Dz8Yi7WMzJETfDK86anDJzzs17SALkmK9/YHlq7e9M2sF Uglyq0bwH0hCeM0j6mI/LcwrG1dgZicRh3X9ECVLTnKAXGY0aGixUob59 D9BseVgCn08L2fTl/qSJUqkRq3MCYIK/5f+zq8dYTfthKRXzAZrNynGpx HCeuE1inmbt96OkaoTxUqpKBTqkDnIJ67G7SzDLRS+UVlOrQ/1eXWKs3d k7aZ2SgWGjg1D4qaSb0biZiZeKW2YTFISnhzJxIIMjkyfK63/xODjZAMT g==; X-IronPort-AV: E=McAfee;i="6600,9927,10865"; a="389560852" X-IronPort-AV: E=Sophos;i="6.03,231,1694761200"; d="scan'208";a="389560852" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Oct 2023 20:21:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10865"; a="826270060" X-IronPort-AV: E=Sophos;i="6.03,231,1694761200"; d="scan'208";a="826270060" Received: from sqa-gate.sh.intel.com (HELO spr-2s5.tsp.org) ([10.239.48.212]) by fmsmga004.fm.intel.com with ESMTP; 16 Oct 2023 20:21:23 -0700 From: Tina Zhang To: iommu@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: David Woodhouse , Lu Baolu , Joerg Roedel , Jason Gunthorpe , Kevin Tian , Tina Zhang Subject: [RFC PATCH 06/12] iommu: Add mmu_notifier to sva domain Date: Tue, 17 Oct 2023 11:20:39 +0800 Message-Id: <20231017032045.114868-8-tina.zhang@intel.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20231017032045.114868-1-tina.zhang@intel.com> References: <20231017032045.114868-1-tina.zhang@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Devices attached to shared virtual addressing (SVA) domain are allowed to use the same virtual addresses with processor, and this functionality is called shared virtual memory. When shared virtual memory is being used, it's the sva domain's responsibility to keep device TLB cache and the CPU cache in sync. Hence add mmu_notifier to sva domain. Signed-off-by: Tina Zhang --- include/linux/iommu.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 19b5ae2303ff..afb566230427 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -7,6 +7,7 @@ #ifndef __LINUX_IOMMU_H #define __LINUX_IOMMU_H +#include #include #include #include @@ -114,6 +115,7 @@ struct iommu_domain { * protected by iommu_sva_lock. */ struct list_head next; + struct mmu_notifier notifier; }; }; };