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=-6.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 6D9D2C63793 for ; Thu, 22 Jul 2021 13:45:02 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 344F560720 for ; Thu, 22 Jul 2021 13:45:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 344F560720 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/aemYZfRBS0BZpYvnpScJbwigm71Si0a/BV4+riPz3U=; b=XG7R4zJfLB4qtG jzh7eYmARSZeNK5CJ9vNSSxtCsil7bZiXehEMMLrFpR6BDuKiCJmd7rRugt96AHqcgYXnRotH6KNz f8cn7jidLGIM+1djDtCDeJaTTO9vUzH1iUcnEdHkZKMKVgdcPZ2FObO+5vq/iI3X9uWydwpLiwo5s RfNFjaVqLc4u2/n3hHc1STzR7WPyjKeQt4XxHh0WAIf9zvPgyQLw2IwcmU5laG9pfDLH1gPfjy606 K50c92b4t5+br3AaA1c/B18FKXFDtS9UgPOCrN8QS3X/fJNKTlL8cR4bKtL95vnqDeN5Dtt+SVmcr l1PiN+FtPnZujHPd8bTg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m6Yyn-001j6U-2u; Thu, 22 Jul 2021 13:43:13 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m6Yqk-001h19-4l for linux-arm-kernel@lists.infradead.org; Thu, 22 Jul 2021 13:34:55 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id C2E9867373; Thu, 22 Jul 2021 15:34:50 +0200 (CEST) Date: Thu, 22 Jul 2021 15:34:50 +0200 From: Christoph Hellwig To: "Tian, Kevin" Cc: Joerg Roedel , Jason Gunthorpe , Christoph Hellwig , Alex Williamson , David Woodhouse , Lu Baolu , Will Deacon , Kirti Wankhede , "linux-arm-kernel@lists.infradead.org" , "iommu@lists.linux-foundation.org" , "kvm@vger.kernel.org" , Robin Murphy Subject: Re: [PATCH 3/6] vfio: remove the unused mdev iommu hook Message-ID: <20210722133450.GA29155@lst.de> References: <20210514121925.GI1096940@ziepe.ca> <20210514133143.GK1096940@ziepe.ca> <20210517123010.GO1096940@ziepe.ca> <20210517133500.GP1096940@ziepe.ca> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210722_063454_389191_9DC98157 X-CRM114-Status: GOOD ( 12.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jun 30, 2021 at 09:08:19AM +0000, Tian, Kevin wrote: > The iommu layer should maintain above attaching status per device and per > iommu domain. There is no mdev/subdev concept in the iommu layer. It's > just about RID or PASID. Yes, I think that makes sense. > And a new set of IOMMU-API: > > - iommu_{un}bind_pgtable(domain, dev, addr); > - iommu_{un}bind_pgtable_pasid(domain, dev, addr, pasid); > - iommu_cache_invalidate(domain, dev, invalid_info); What caches is this supposed to "invalidate"? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel