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=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 DD6ABC76186 for ; Tue, 23 Jul 2019 18:51:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B030F21841 for ; Tue, 23 Jul 2019 18:51:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391570AbfGWSvO (ORCPT ); Tue, 23 Jul 2019 14:51:14 -0400 Received: from shards.monkeyblade.net ([23.128.96.9]:35094 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726621AbfGWSvN (ORCPT ); Tue, 23 Jul 2019 14:51:13 -0400 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::d71]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 8B47C153B91FF; Tue, 23 Jul 2019 11:51:12 -0700 (PDT) Date: Tue, 23 Jul 2019 11:51:12 -0700 (PDT) Message-Id: <20190723.115112.1824255524103179323.davem@davemloft.net> To: jonathanh@nvidia.com Cc: robin.murphy@arm.com, Jose.Abreu@synopsys.com, lists@bofh.nu, ilias.apalodimas@linaro.org, Joao.Pinto@synopsys.com, alexandre.torgue@st.com, maxime.ripard@bootlin.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, wens@csie.org, mcoquelin.stm32@gmail.com, linux-tegra@vger.kernel.org, peppe.cavallaro@st.com, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH net-next 3/3] net: stmmac: Introducing support for Page Pool From: David Miller In-Reply-To: <8756d681-e167-fe4a-c6f0-47ae2dcbb100@nvidia.com> References: <6c769226-bdd9-6fe0-b96b-5a0d800fed24@arm.com> <8756d681-e167-fe4a-c6f0-47ae2dcbb100@nvidia.com> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Tue, 23 Jul 2019 11:51:13 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jon Hunter Date: Tue, 23 Jul 2019 13:09:00 +0100 > Setting "iommu.passthrough=1" works for me. However, I am not sure where > to go from here, so any ideas you have would be great. Then definitely we are accessing outside of a valid IOMMU mapping due to the page pool support changes. Such a problem should be spotted with swiommu enabled with debugging.