Hi,
On 09/11/17 03:32, Yisheng Xie wrote:
> Hi Jean,
>
> On 2017/10/6 21:31, Jean-Philippe Brucker wrote:
>> Hook process operations to support PASID and page table sharing with the
>> SMMUv3:
>>
>> +
>> +static void arm_smmu_process_exit(struct iommu_domain *domain,
>> + struct iommu_process *process)
>> +{
>> + struct arm_smmu_master_data *master;
>> + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
>> +
>> + if (!domain->process_exit)
>> + return;
>
> If domain do not set process_exit handler, just return? smmu do not
> need invalid ATC, clear cd entry, etc.? Maybe you should check when
> call domain->process_exit?
Indeed, that doesn't make sense. I'll move the check below.
Thanks,
Jean
>> +
>> + spin_lock(&smmu_domain->devices_lock);
>> + list_for_each_entry(master, &smmu_domain->devices, list) {
>> + if (!master->processes)
>> + continue;
>> +
>> + master->processes--;
> Add
> if (domain->process_exit)
> here?
>> + domain->process_exit(domain, master->dev, process->pasid,
>> + domain->process_exit_token);
>> +
>> + /* TODO: inval ATC */
>> + }
>> + spin_unlock(&smmu_domain->devices_lock);
>> +
>> + arm_smmu_write_ctx_desc(smmu_domain, process->pasid, NULL);
>> +
>> + /* TODO: Invalidate all mappings if not DVM */
>> +}
>> +
> Thanks
> Yisheng Xie
>
>
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