From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E07A71FB9; Wed, 26 Jul 2023 06:24:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690352687; x=1721888687; h=message-id:date:mime-version:cc:subject:to:references: from:in-reply-to:content-transfer-encoding; bh=DlKsXPAKvUQNyaHWuLEMn+YeZGej9B0RE5XdM6qJwbQ=; b=DcTIuyJdgJyXm5llxYf0S5e1ICmTF4gtl5+0U4MRurGjof9kSrKvN6iz uYVkpUcFGWaG3e+KuMFSekhKqmJS4IvlcTH6a6kQgRoCKpPGVfqTPPHpJ kDk0kZvaHFAOztf+oN2fY6pHmPnu+MLjU7LaMZk9hwTKcxk8mV+xqGrRC 0zGN6dj1HK8JLq/NsowYt3T6ZG4Or6T4hSgJpT3OUKVUU+A/5cGP1mQvt 0qPlwRZuyD1/9zuPnicJFt5ALVG9Tp5dVSLHpxIIYvNf5zf7muXnHzPTN Cjb4LJ1ZSgluvQUPBCZCw3JokrfYddmhm9dR/eagrjnLpn1n/v7CscYCL g==; X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="365384327" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="365384327" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2023 23:24:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10782"; a="1057075644" X-IronPort-AV: E=Sophos;i="6.01,231,1684825200"; d="scan'208";a="1057075644" Received: from blu2-mobl.ccr.corp.intel.com (HELO [10.254.208.129]) ([10.254.208.129]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2023 23:24:20 -0700 Message-ID: <7186790f-abed-61ba-2d19-6ab66640f30a@linux.intel.com> Date: Wed, 26 Jul 2023 14:24:18 +0800 Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Cc: baolu.lu@linux.intel.com, Dmitry Osipenko , Marek Szyprowski , Nicolin Chen , Niklas Schnelle , Steven Price , Thierry Reding Subject: Re: [PATCH v5 02/25] iommu: Add IOMMU_DOMAIN_PLATFORM 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: <2-v5-d0a204c678c7+3d16a-iommu_all_defdom_jgg@nvidia.com> From: Baolu Lu In-Reply-To: <2-v5-d0a204c678c7+3d16a-iommu_all_defdom_jgg@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2023/7/25 1:21, Jason Gunthorpe wrote: > This is used when the iommu driver is taking control of the dma_ops, > currently only on S390 and power spapr. It is designed to preserve the > original ops->detach_dev() semantic that these S390 was built around. > > Provide an opaque domain type and a 'default_domain' ops value that allows > the driver to trivially force any single domain as the default domain. > > Signed-off-by: Jason Gunthorpe > --- > drivers/iommu/iommu.c | 14 +++++++++++++- > include/linux/iommu.h | 6 ++++++ > 2 files changed, 19 insertions(+), 1 deletion(-) Reviewed-by: Lu Baolu