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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E5C9BC001DC for ; Wed, 26 Jul 2023 06:13:22 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=NiRmdLw+; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4R9k9F0JcJz3cHp for ; Wed, 26 Jul 2023 16:13:21 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=NiRmdLw+; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=linux.intel.com (client-ip=134.134.136.100; helo=mga07.intel.com; envelope-from=baolu.lu@linux.intel.com; receiver=lists.ozlabs.org) X-Greylist: delayed 65 seconds by postgrey-1.37 at boromir; Wed, 26 Jul 2023 16:12:28 AEST Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4R9k8D06wRz2yVV for ; Wed, 26 Jul 2023 16:12:27 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690351948; x=1721887948; h=message-id:date:mime-version:cc:subject:to:references: from:in-reply-to:content-transfer-encoding; bh=WDQtGHcWzopAoO6Fwuln0OAiUSdM4jJjH8FxFV/d+w0=; b=NiRmdLw+VVye+dAvTQGVQEaMAChlEXb7tgh1qxo9IbBvnDZL28ZXdNrP 7jcklxRVQSCUXcGHkxTm5uXukwr/nRw8ELZrI1W6p2UXnKS0suJIQjJSu GngdqKaG8fFFAS/7zkJ5m+/vqeuCDwX0PZpml5qn7dpc96NpVyZZZ8Wza 7DsoLLHCWZ0NRKr+r3YjOhVSoSHlmVk0BEbGR3fF+ebHoBrkupr1eylvi 4lzSLp7GD4uXmErJGE7mh+fu4m7VFqwRL2C5ZtJPPcZYhcoKFPc38Kj+f r1EW34ysrWXQwSOq6AmlyeoilXqdKHH4rw60hHpXJNhi4bQNPq0sdQac6 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="434186772" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="434186772" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2023 23:11:16 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="816538258" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="816538258" Received: from blu2-mobl.ccr.corp.intel.com (HELO [10.254.208.129]) ([10.254.208.129]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2023 23:11:06 -0700 Message-ID: Date: Wed, 26 Jul 2023 14:11:04 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: [PATCH v5 01/25] iommu: Add iommu_ops->identity_domain Content-Language: en-US To: Jason Gunthorpe , Andy Gross , Alim Akhtar , Bjorn Andersson , AngeloGioacchino Del Regno , Baolin Wang , Christophe Leroy , Gerald Schaefer , Heiko Stuebner , iommu@lists.linux.dev, Jernej Skrabec , Jonathan Hunter , Joerg Roedel , Kevin Tian , Konrad Dybcio , Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-s390@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, Russell King , linuxppc-dev@lists.ozlabs.org, Matthias Brugger , Matthew Rosato , Michael Ellerman , Nicholas Piggin , Orson Zhai , Rob Clark , Robin Murphy , Samuel Holland , Thierry Reding , Krishna Reddy , Chen-Yu Tsai , Will Deacon , Yong Wu , Chunyan Zhang References: <1-v5-d0a204c678c7+3d16a-iommu_all_defdom_jgg@nvidia.com> From: Baolu Lu In-Reply-To: <1-v5-d0a204c678c7+3d16a-iommu_all_defdom_jgg@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thierry Reding , Niklas Schnelle , Steven Price , Nicolin Chen , Dmitry Osipenko , baolu.lu@linux.intel.com, Marek Szyprowski Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 2023/7/25 1:21, Jason Gunthorpe wrote: > This allows a driver to set a global static to an IDENTITY domain and > the core code will automatically use it whenever an IDENTITY domain > is requested. > > By making it always available it means the IDENTITY can be used in error > handling paths to force the iommu driver into a known state. Devices > implementing global static identity domains should avoid failing their > attach_dev ops. > > Convert rockchip to use the new mechanism. > > Tested-by: Steven Price > Tested-by: Marek Szyprowski > Tested-by: Nicolin Chen > Signed-off-by: Jason Gunthorpe > --- > drivers/iommu/iommu.c | 3 +++ > drivers/iommu/rockchip-iommu.c | 9 +-------- > include/linux/iommu.h | 3 +++ > 3 files changed, 7 insertions(+), 8 deletions(-) I will later convert the VT-d driver to use iommu_ops->identity_domain. Reviewed-by: Lu Baolu