linux-kernel - RE: [PATCH 08/12] iommu/vt-d: Use cache_tag_flush_range() in cache_invalidate

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Date: Thu, 28 Mar 2024 07:54:53 +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>
CC: "Zhang, Tina" <tina.zhang@...el.com>, "Liu, Yi L" <yi.l.liu@...el.com>,
	"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 08/12] iommu/vt-d: Use cache_tag_flush_range() in
 cache_invalidate_user

> From: Lu Baolu <baolu.lu@...ux.intel.com>
> Sent: Monday, March 25, 2024 10:17 AM
>
> @@ -166,9 +122,9 @@ static int intel_nested_cache_invalidate_user(struct
> iommu_domain *domain,
>  			break;
>  		}
> 
> -		intel_nested_flush_cache(dmar_domain, inv_entry.addr,
> -					 inv_entry.npages,
> -					 inv_entry.flags &
> IOMMU_VTD_INV_FLAGS_LEAF);
> +		cache_tag_flush_range(dmar_domain, inv_entry.addr,
> +				      inv_entry.npages,
> +				      inv_entry.flags &
> IOMMU_VTD_INV_FLAGS_LEAF);

the helper requires an 'end' address but 'npages' is incorrectly used here.