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:   Thu, 4 May 2023 14:26:33 -0700
From:   Jacob Pan <jacob.jun.pan@linux.intel.com>
To:     Baolu Lu <baolu.lu@linux.intel.com>
Cc:     LKML <linux-kernel@vger.kernel.org>, iommu@lists.linux.dev,
        Robin Murphy <robin.murphy@arm.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        Joerg Roedel <joro@8bytes.org>, dmaengine@vger.kernel.org,
        vkoul@kernel.org, Will Deacon <will@kernel.org>,
        David Woodhouse <dwmw2@infradead.org>,
        Raj Ashok <ashok.raj@intel.com>,
        "Tian, Kevin" <kevin.tian@intel.com>, Yi Liu <yi.l.liu@intel.com>,
        "Yu, Fenghua" <fenghua.yu@intel.com>,
        Dave Jiang <dave.jiang@intel.com>,
        Tony Luck <tony.luck@intel.com>,
        "Zanussi, Tom" <tom.zanussi@intel.com>,
        narayan.ranganathan@intel.com, jacob.jun.pan@linux.intel.com
Subject: Re: [PATCH v5 3/7] iommu: Move global PASID allocation from SVA to
 core
Message-ID: <20230504142633.1a7e78ae@jacob-builder>
In-Reply-To: <db3be8a2-6520-9652-6bee-dbceb320cfc2@linux.intel.com>
References: <20230427174937.471668-1-jacob.jun.pan@linux.intel.com>
        <20230427174937.471668-4-jacob.jun.pan@linux.intel.com>
        <db3be8a2-6520-9652-6bee-dbceb320cfc2@linux.intel.com>
Organization: OTC
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi Baolu,

On Wed, 3 May 2023 14:32:15 +0800, Baolu Lu <baolu.lu@linux.intel.com>
wrote:

> On 4/28/23 1:49 AM, Jacob Pan wrote:
> > +ioasid_t iommu_alloc_global_pasid_dev(struct device *dev)
> > +{
> > +	int ret;
> > +	ioasid_t max;
> > +
> > +	max = dev_iommu_get_max_pasids(dev);  
> 
> Perhaps you can use dev->iommu->max_pasids. It's static, so no need to
> recalculate it.
> 
sounds good!


Thanks,

Jacob