linux-kernel - RE: [PATCH v3 3/7] iommu/vt-d: Add blocking domain support

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Date:   Wed, 16 Nov 2022 03:51:06 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>
CC:     Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        "Robin Murphy" <robin.murphy@....com>,
        "Liu, Yi L" <yi.l.liu@...el.com>,
        "Pan, Jacob jun" <jacob.jun.pan@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v3 3/7] iommu/vt-d: Add blocking domain support

> From: Lu Baolu <baolu.lu@...ux.intel.com>
> Sent: Monday, November 14, 2022 9:41 AM
> 
> The Intel IOMMU hardwares support blocking DMA transactions by clearing
> the translation table entries. This implements a real blocking domain to
> avoid using an empty UNMANAGED domain. The detach_dev callback of the
> domain ops is not used in any path. Remove it to avoid dead code as well.
> 
> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>

Reviewed-by: Kevin Tian <kevin.tian@...el.com>