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, 10 Aug 2023 15:33:54 -0300
From:   Jason Gunthorpe <jgg@ziepe.ca>
To:     Lu Baolu <baolu.lu@linux.intel.com>
Cc:     Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
        Robin Murphy <robin.murphy@arm.com>,
        Kevin Tian <kevin.tian@intel.com>,
        Jean-Philippe Brucker <jean-philippe@linaro.org>,
        Nicolin Chen <nicolinc@nvidia.com>,
        Yi Liu <yi.l.liu@intel.com>,
        Jacob Pan <jacob.jun.pan@linux.intel.com>,
        iommu@lists.linux.dev, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 04/12] iommu: Replace device fault handler with
 iommu_queue_iopf()
Message-ID: <ZNUtkjRhi5c/W8pD@ziepe.ca>
References: <20230727054837.147050-1-baolu.lu@linux.intel.com>
 <20230727054837.147050-5-baolu.lu@linux.intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230727054837.147050-5-baolu.lu@linux.intel.com>
Precedence: bulk

On Thu, Jul 27, 2023 at 01:48:29PM +0800, Lu Baolu wrote:
> The individual iommu drivers report iommu faults by calling
> iommu_report_device_fault(), where a pre-registered device fault handler
> is called to route the fault to another fault handler installed on the
> corresponding iommu domain.
> 
> The pre-registered device fault handler is static and won't be dynamic
> as the fault handler is eventually per iommu domain. Replace calling
> device fault handler with iommu_queue_iopf().
> 
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
> ---
>  drivers/iommu/iommu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
> index 4352a149a935..00309f66153b 100644
> --- a/drivers/iommu/iommu.c
> +++ b/drivers/iommu/iommu.c
> @@ -1381,7 +1381,7 @@ int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
>  		mutex_unlock(&fparam->lock);
>  	}
>  
> -	ret = fparam->handler(&evt->fault, fparam->data);
> +	ret = iommu_queue_iopf(&evt->fault, dev);

Also fix the function signature at this point:

int iommu_queue_iopf(struct iommu_fault *fault, void *cookie)

It should not be 'void *cookie' anymore, it is just 'struct device *dev'

Jason