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Re: [PATCH 1/4] amd-vi: fix IVMD memory type checks
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 6 Feb 2024 11:16:51 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, oxjo@xxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 06 Feb 2024 10:17:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 01.02.2024 18:01, Roger Pau Monne wrote:
> The current code that parses the IVMD blocks is relaxed with regard to the
> restriction that such unity regions should always fall into memory ranges
> marked as reserved in the memory map.
>
> However the type checks for the IVMD addresses are inverted, and as a result
> IVMD ranges falling into RAM areas are accepted. Note that having such ranges
> in the first place is a firmware bug, as IVMD should always fall into reserved
> ranges.
>
> Fixes: ed6c77ebf0c1 ('AMD/IOMMU: check / convert IVMD ranges for being / to
> be reserved')
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
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