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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 13EBEC2BB85 for ; Thu, 16 Apr 2020 08:54:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E374E20732 for ; Thu, 16 Apr 2020 08:54:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="LLp5LveC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2503010AbgDPIyp (ORCPT ); Thu, 16 Apr 2020 04:54:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41202 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2502988AbgDPIyR (ORCPT ); Thu, 16 Apr 2020 04:54:17 -0400 Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BCAFBC061A10 for ; Thu, 16 Apr 2020 01:54:12 -0700 (PDT) Received: by mail-wr1-x443.google.com with SMTP id h26so3856559wrb.7 for ; Thu, 16 Apr 2020 01:54:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=ZEfcdbyCoFlwcBaVZ+sf0k9hPs9ies0vbK3IcfLzskw=; b=LLp5LveCwz1C/4FgavId+LAMO+lPQeQAh5i6g/dwBkd5KRmxdDAOZ9/FDSM6LaE2DO Td6D1PD2vfJMUfU418BKIvqN2n542k0/GOSD1zFfk3KEg6YVnVpiYcQElgtfTWfhW1Hc pyRHcoAoIzLIeqmthE1eiaqNblTBPZh2QK//NuiYOH4m49CJlMjlge+Af8W0dLnPXfDM TI6i6FGWr2uL3dkWfiES2q+uTGrtmI8VH2eWwpnuQoWS1aDfIKdtLlIrcAMs/dkatob5 C2RU6qFiWHenxSdOpD61IuhKr0PagtaYgwqeoLijcAccCZ9r8LhwudjqfQNZwoQRmc4d jdrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=ZEfcdbyCoFlwcBaVZ+sf0k9hPs9ies0vbK3IcfLzskw=; b=NwuPkWJ7YH617QJEPQxXDJV8eqXqMYdbUYxs0mcweQptT4siK33g2IKVQy2VgRq8bu CKk/KZcCjiSdoZgPNoul9vJSrHNikgotwVh3snyWAFt5DWRWiQ+2I7CQ+F0W5oP0pZ5J Ag+EBn+Zg+oLqLMP5AQ7LTCJgqHc77tFxfljGS/qQjvlhaBsNbDR2oppvpi6CNFXPiUq 1Gq5TQhOW+TXQPRxsTwi3LHmDI2CbQSeoAPXaYAUN52zeVvyZ+uV0dW1Ez6ZHzY3t5tq K3WF7r4sbZqJPAL7rr2f4S2gpqggH/AICQRkw80joXlbsuASsSY4szOZN68E1STbTNkt 2fCA== X-Gm-Message-State: AGi0PuYV/yLJjCDA4rciTiLfFxWpHCcKYQ5OUy7NAoNSLLmK4glTNmo3 sMazPSM4s2R9AETVyvt0oePlEA== X-Google-Smtp-Source: APiQypL1oyr16FXQx+dkfWQBU6EhMLZhnOgOJbCMSB0gnYSQVADLx4g3CAzdUNtaCRw76OTkBu7LoA== X-Received: by 2002:a5d:6305:: with SMTP id i5mr34790010wru.203.1587027251542; Thu, 16 Apr 2020 01:54:11 -0700 (PDT) Received: from myrica ([2001:171b:226b:54a0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id u7sm3027041wmg.41.2020.04.16.01.54.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Apr 2020 01:54:11 -0700 (PDT) Date: Thu, 16 Apr 2020 10:54:02 +0200 From: Jean-Philippe Brucker To: Christoph Hellwig Cc: iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, joro@8bytes.org, catalin.marinas@arm.com, will@kernel.org, robin.murphy@arm.com, kevin.tian@intel.com, baolu.lu@linux.intel.com, Jonathan.Cameron@huawei.com, jacob.jun.pan@linux.intel.com, christian.koenig@amd.com, zhangfei.gao@linaro.org, jgg@ziepe.ca, xuzaibo@huawei.com Subject: Re: [PATCH v5 02/25] iommu/sva: Manage process address spaces Message-ID: <20200416085402.GB1286150@myrica> References: <20200414170252.714402-1-jean-philippe@linaro.org> <20200414170252.714402-3-jean-philippe@linaro.org> <20200416072852.GA32000@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200416072852.GA32000@infradead.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Thu, Apr 16, 2020 at 12:28:52AM -0700, Christoph Hellwig wrote: > > + rcu_read_lock(); > > + hlist_for_each_entry_rcu(bond, &io_mm->devices, mm_node) > > + io_mm->ops->invalidate(bond->sva.dev, io_mm->pasid, io_mm->ctx, > > + start, end - start); > > + rcu_read_unlock(); > > +} > > What is the reason that the devices don't register their own notifiers? > This kinds of multiplexing is always rather messy, and you do it for > all the methods. This sends TLB and ATC invalidations through the IOMMU, it doesn't go through device drivers Thanks, Jean 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=-0.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 99198C352BE for ; Thu, 16 Apr 2020 08:54:16 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 5E89620784 for ; Thu, 16 Apr 2020 08:54:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="LLp5LveC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5E89620784 Authentication-Results: mail.kernel.org; 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Thu, 16 Apr 2020 01:54:11 -0700 (PDT) Date: Thu, 16 Apr 2020 10:54:02 +0200 From: Jean-Philippe Brucker To: Christoph Hellwig Subject: Re: [PATCH v5 02/25] iommu/sva: Manage process address spaces Message-ID: <20200416085402.GB1286150@myrica> References: <20200414170252.714402-1-jean-philippe@linaro.org> <20200414170252.714402-3-jean-philippe@linaro.org> <20200416072852.GA32000@infradead.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200416072852.GA32000@infradead.org> Cc: devicetree@vger.kernel.org, kevin.tian@intel.com, jgg@ziepe.ca, linux-pci@vger.kernel.org, robin.murphy@arm.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org, catalin.marinas@arm.com, zhangfei.gao@linaro.org, will@kernel.org, christian.koenig@amd.com, linux-arm-kernel@lists.infradead.org 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Thu, Apr 16, 2020 at 12:28:52AM -0700, Christoph Hellwig wrote: > > + rcu_read_lock(); > > + hlist_for_each_entry_rcu(bond, &io_mm->devices, mm_node) > > + io_mm->ops->invalidate(bond->sva.dev, io_mm->pasid, io_mm->ctx, > > + start, end - start); > > + rcu_read_unlock(); > > +} > > What is the reason that the devices don't register their own notifiers? > This kinds of multiplexing is always rather messy, and you do it for > all the methods. This sends TLB and ATC invalidations through the IOMMU, it doesn't go through device drivers Thanks, Jean _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu 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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 C6A6DC2BB85 for ; Thu, 16 Apr 2020 08:54:17 +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 975A421569 for ; 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Thu, 16 Apr 2020 01:54:11 -0700 (PDT) Received: from myrica ([2001:171b:226b:54a0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id u7sm3027041wmg.41.2020.04.16.01.54.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Apr 2020 01:54:11 -0700 (PDT) Date: Thu, 16 Apr 2020 10:54:02 +0200 From: Jean-Philippe Brucker To: Christoph Hellwig Subject: Re: [PATCH v5 02/25] iommu/sva: Manage process address spaces Message-ID: <20200416085402.GB1286150@myrica> References: <20200414170252.714402-1-jean-philippe@linaro.org> <20200414170252.714402-3-jean-philippe@linaro.org> <20200416072852.GA32000@infradead.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200416072852.GA32000@infradead.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200416_015413_537319_BBDB15FB X-CRM114-Status: UNSURE ( 9.25 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, kevin.tian@intel.com, jacob.jun.pan@linux.intel.com, jgg@ziepe.ca, linux-pci@vger.kernel.org, joro@8bytes.org, Jonathan.Cameron@huawei.com, robin.murphy@arm.com, linux-mm@kvack.org, iommu@lists.linux-foundation.org, catalin.marinas@arm.com, zhangfei.gao@linaro.org, xuzaibo@huawei.com, will@kernel.org, christian.koenig@amd.com, linux-arm-kernel@lists.infradead.org, baolu.lu@linux.intel.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Apr 16, 2020 at 12:28:52AM -0700, Christoph Hellwig wrote: > > + rcu_read_lock(); > > + hlist_for_each_entry_rcu(bond, &io_mm->devices, mm_node) > > + io_mm->ops->invalidate(bond->sva.dev, io_mm->pasid, io_mm->ctx, > > + start, end - start); > > + rcu_read_unlock(); > > +} > > What is the reason that the devices don't register their own notifiers? > This kinds of multiplexing is always rather messy, and you do it for > all the methods. This sends TLB and ATC invalidations through the IOMMU, it doesn't go through device drivers Thanks, Jean _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel