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Re: [PATCH v2] x86/iommu: adjust type in arch_iommu_hwdom_init()
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 24 May 2023 16:46:11 +0200
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- Cc: Paul Durrant <paul@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 24 May 2023 14:46:29 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 24.05.2023 16:30, Roger Pau Monne wrote:
> The 'i' iterator index stores a PDX, not a PFN, and hence the initial
> assignation of start (which stores a PFN) needs a conversion from PFN
> to PDX.
>
> This is harmless currently, as the PDX compression skips the bottom
> MAX_ORDER bits which cover the low 1MB, but still do the conversion
> from PDX to PFN for type correctness.
>
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
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