linux-kernel - Re: [PATCH v7 05/23] iommu: Introduce cache

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Date:   Thu, 2 May 2019 08:58:29 +0200
From:   Auger Eric <eric.auger@...hat.com>
To:     Jean-Philippe Brucker <jean-philippe.brucker@....com>,
        eric.auger.pro@...il.com, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        kvmarm@...ts.cs.columbia.edu, joro@...tes.org,
        alex.williamson@...hat.com, jacob.jun.pan@...ux.intel.com,
        yi.l.liu@...el.com, will.deacon@....com, robin.murphy@....com
Cc:     peter.maydell@...aro.org, kevin.tian@...el.com,
        vincent.stehle@....com, ashok.raj@...el.com, marc.zyngier@....com,
        christoffer.dall@....com
Subject: Re: [PATCH v7 05/23] iommu: Introduce cache_invalidate API

Hi Jean-Philippe,

On 5/1/19 12:38 PM, Jean-Philippe Brucker wrote:
> On 08/04/2019 13:18, Eric Auger wrote:
>> +int iommu_cache_invalidate(struct iommu_domain *domain, struct device *dev,
>> +			   struct iommu_cache_invalidate_info *inv_info)
>> +{
>> +	int ret = 0;
>> +
>> +	if (unlikely(!domain->ops->cache_invalidate))
>> +		return -ENODEV;
>> +
>> +	ret = domain->ops->cache_invalidate(domain, dev, inv_info);
>> +
>> +	return ret;
> 
> Nit: you don't really need ret
> 
> The UAPI looks good to me, so
> 
> Reviewed-by: Jean-Philippe Brucker <jean-philippe.brucker@....com>
Just to make sure, do you accept changes proposed by Jacob in
https://lkml.org/lkml/2019/4/29/659 ie.
- the addition of NR_IOMMU_INVAL_GRANU in enum iommu_inv_granularity and
- the addition of NR_IOMMU_CACHE_TYPE

Thanks

Eric
>