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RE: [PATCH v9 4/8] iommu: make map and unmap take a page count, similar to flush
- To: Paul Durrant <paul@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
- Date: Thu, 17 Sep 2020 06:38:37 +0000
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- Cc: Paul Durrant <pdurrant@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, "Wei Liu" <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>
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- Thread-topic: [PATCH v9 4/8] iommu: make map and unmap take a page count, similar to flush
> From: Paul Durrant <paul@xxxxxxx>
> Sent: Tuesday, September 15, 2020 4:30 PM
>
> From: Paul Durrant <pdurrant@xxxxxxxxxx>
>
> At the moment iommu_map() and iommu_unmap() take a page order rather
> than a
> count, whereas iommu_iotlb_flush() takes a page count rather than an order.
> This patch makes them consistent with each other, opting for a page count
> since
> CPU page orders are not necessarily the same as those of an IOMMU.
>
> NOTE: The 'page_count' parameter is also made an unsigned long in all the
> aforementioned functions.
>
> Signed-off-by: Paul Durrant <pdurrant@xxxxxxxxxx>
> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
> Reviewed-by: Julien Grall <julien@xxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
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