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Date: Wed, 28 Feb 2024 09:13:45 +0800
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Cc: baolu.lu@linux.intel.com, "iommu@lists.linux.dev"
 <iommu@lists.linux.dev>,
 "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
 Jason Gunthorpe <jgg@nvidia.com>
Subject: Re: [PATCH 1/2] iommu: Add static iommu_ops->release_domain
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To: "Tian, Kevin" <kevin.tian@intel.com>, Joerg Roedel <joro@8bytes.org>,
 Will Deacon <will@kernel.org>, Robin Murphy <robin.murphy@arm.com>,
 Jason Gunthorpe <jgg@ziepe.ca>, "Badger, Eric" <ebadger@purestorage.com>
References: <20240223051302.177596-1-baolu.lu@linux.intel.com>
 <20240223051302.177596-2-baolu.lu@linux.intel.com>
 <BN9PR11MB52766C0E58E2CB6989E0EB608C592@BN9PR11MB5276.namprd11.prod.outlook.com>
From: Baolu Lu <baolu.lu@linux.intel.com>
In-Reply-To: <BN9PR11MB52766C0E58E2CB6989E0EB608C592@BN9PR11MB5276.namprd11.prod.outlook.com>
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On 2/27/24 3:32 PM, Tian, Kevin wrote:
>> From: Lu Baolu<baolu.lu@linux.intel.com>
>> Sent: Friday, February 23, 2024 1:13 PM
>>
>>
>> +	/*
>> +	 * If the iommu driver provides release_domain then the core code
>> +	 * ensures that domain is attached prior to calling release_device.
>> +	 * Drivers can use this to enforce a translation on the idle iommu.
> 'enforce a translation' is confusing in the context of blocking/identity
> domain.

Blocking or identity domain is also kind of a translation from the
core's perspective. The core does not care what type of translation the
release_domain is; it just enforces this type of translation before
device release if the driver has specified one.

Best regards,
baolu