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Re: [PATCH 2/4] iommu/x86: introduce a generic IVMD/RMRR range validity helper
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 6 Feb 2024 12:17:29 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Paul Durrant <paul@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 06 Feb 2024 11:17:48 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 01.02.2024 18:01, Roger Pau Monne wrote:
> IVMD and RMRR ranges are functionally equivalent, and as so could use the same
> validity checker.
May I suggest s/equivalent/similar/?
> Move the IVMD to x86 common IOMMU code and adjust the function to take a pair
> of [start, end) mfn parameters.
[start,end) ranges generally come with the problem of not allowing to
represent the full address space. While that isn't specifically a problem
here, seeing that both VT-d and V-i present inclusive ranges, how about
making the common function match that?
Jan
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