linux-kernel - RE: [PATCH v4 07/10] iommu: Merge iommu_fault_event and iopf

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Message-ID: <BN9PR11MB5276E342E0E774CABA484B258CE3A@BN9PR11MB5276.namprd11.prod.outlook.com>
Date:   Fri, 25 Aug 2023 08:03:11 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        "Will Deacon" <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        "Jason Gunthorpe" <jgg@...pe.ca>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Nicolin Chen <nicolinc@...dia.com>
CC:     "Liu, Yi L" <yi.l.liu@...el.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v4 07/10] iommu: Merge iommu_fault_event and iopf_fault

> From: Lu Baolu <baolu.lu@...ux.intel.com>
> Sent: Friday, August 25, 2023 10:30 AM
> 
> -/**
> - * struct iommu_fault_event - Generic fault event
> - *
> - * Can represent recoverable faults such as a page requests or
> - * unrecoverable faults such as DMA or IRQ remapping faults.
> - *
> - * @fault: fault descriptor
> - * @list: pending fault event list, used for tracking responses
> - */
> -struct iommu_fault_event {
> -	struct iommu_fault fault;
> -	struct list_head list;
> -};
> -

iommu_fault_event is more forward-looking if unrecoverable fault
will be supported in future. From this angle it might make more
sense to keep it to replace iopf_fault.