Subject: Re: [PATCH] vfio powerpc: enabled on powernv platform

From: Alexey Kardashevskiy <[email-masked]>
Date: Wed, 12 Dec 2012 17:14:07 +1100

On 08/12/12 04:38, Alex Williamson wrote:
>> +static int __init tce_iommu_init(void)
>> +{
>> +	struct pci_dev *pdev = NULL;
>> +	struct iommu_table *tbl;
>> +	struct iommu_group *grp;
>> +
>> +	/* Allocate and initialize IOMMU groups */
>> +	for_each_pci_dev(pdev) {
>> +		tbl = get_iommu_table_base(&pdev->dev);
>> +		if (!tbl)
>> +			continue;
>> +
>> +		/* Skip already initialized */
>> +		if (tbl->it_group)
>> +			continue;
>> +
>> +		grp = iommu_group_alloc();
>> +		if (IS_ERR(grp)) {
>> +			pr_info("tce_vfio: cannot create new IOMMU group, ret=%ld\n",
>> +					PTR_ERR(grp));
>> +			return PTR_ERR(grp);
>> +		}
>> +		tbl->it_group = grp;
>> +		iommu_group_set_iommudata(grp, tbl, group_release);
>
> BTW, groups have a name property that shows up in sysfs that can be set
> with iommu_group_set_name().  IIRC, this was a feature David requested
> for PEs.  It'd be nice if it was used for PEs...  Thanks,

But what would I put there?... IOMMU ID is more than enough at the moment 
and struct iommu_table does not have anything what would have made sense to 
show in the sysfs...

-- 
Alexey