Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Tue, 9 May 2023 13:39:40 -0700
From:   Jacob Pan <jacob.jun.pan@linux.intel.com>
To:     "Tian, Kevin" <kevin.tian@intel.com>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        "iommu@lists.linux.dev" <iommu@lists.linux.dev>,
        Robin Murphy <robin.murphy@arm.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Lu Baolu <baolu.lu@linux.intel.com>,
        Joerg Roedel <joro@8bytes.org>,
        "dmaengine@vger.kernel.org" <dmaengine@vger.kernel.org>,
        "vkoul@kernel.org" <vkoul@kernel.org>,
        Will Deacon <will@kernel.org>,
        "David Woodhouse" <dwmw2@infradead.org>,
        "Raj, Ashok" <ashok.raj@intel.com>,
        "Liu, Yi L" <yi.l.liu@intel.com>,
        "Yu, Fenghua" <fenghua.yu@intel.com>,
        "Jiang, Dave" <dave.jiang@intel.com>,
        "Luck, Tony" <tony.luck@intel.com>,
        "Zanussi, Tom" <tom.zanussi@intel.com>,
        "Ranganathan, Narayan" <narayan.ranganathan@intel.com>,
        jacob.jun.pan@linux.intel.com
Subject: Re: [PATCH v5 1/7] iommu: Generalize default PCIe requester ID
 PASID
Message-ID: <20230509133940.6bf0a053@jacob-builder>
In-Reply-To: <BN9PR11MB5276A1CC0B5FF8D9394F22F98C729@BN9PR11MB5276.namprd11.prod.outlook.com>
References: <20230427174937.471668-1-jacob.jun.pan@linux.intel.com>
        <20230427174937.471668-2-jacob.jun.pan@linux.intel.com>
        <BN9PR11MB5276FD027EC3D6BAA24046F58C6B9@BN9PR11MB5276.namprd11.prod.outlook.com>
        <20230428085615.58e437c9@jacob-builder>
        <BN9PR11MB5276A1CC0B5FF8D9394F22F98C729@BN9PR11MB5276.namprd11.prod.outlook.com>
Organization: OTC
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi Kevin,

On Fri, 5 May 2023 08:28:13 +0000, "Tian, Kevin" <kevin.tian@intel.com>
wrote:

> > > >
> > > > By having a common RID_PASID, we can avoid conflicts between
> > > > different use cases in the generic code. e.g. SVA and DMA API with
> > > > PASIDs.  
> > >
> > > You intend it to be generic but in the end only vt-d driver is changed
> > > to use it in this series...  
> > change for SVA is in the patch.  
> 
> My point was that since it is common why there is no change in arm-smmu
> driver to use the common macro?
Got it, I will include changes to SSID 0 in smmu code.

Thanks,

Jacob