linux-kernel - Re: [PATCH v2 2/8] iommu: Validate that devices match domains

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Message-ID: <0ff36f80-652a-655d-ba9c-222b5aa79f72@linux.intel.com>
Date:   Sat, 28 Jan 2023 16:04:32 +0800
From:   Baolu Lu <baolu.lu@...ux.intel.com>
To:     Robin Murphy <robin.murphy@....com>, joro@...tes.org,
        will@...nel.org
Cc:     baolu.lu@...ux.intel.com, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org, hch@....de, jgg@...dia.com
Subject: Re: [PATCH v2 2/8] iommu: Validate that devices match domains

On 2023/1/27 2:26, Robin Murphy wrote:
> Before we can allow drivers to coexist, we need to make sure that one
> driver's domain ops can't misinterpret another driver's dev_iommu_priv
> data. To that end, add a token to the domain so we can remember how it
> was allocated - for now this may as well be the device ops, since they
> still correlate 1:1 with drivers. We can trust ourselves for internal
> default domain attachment, so add the check where it covers both the
> external attach interfaces.
> 
> Signed-off-by: Robin Murphy<robin.murphy@....com>

Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>

Best regards,
baolu