Re: [PATCH v2 18/31] iommu/vt-d: Cache max domain ID to avoid redundant calculation

[Baolu Lu]

On 3/28/26 00:01, Xu Yilun wrote:
> From: Lu Baolu<baolu.lu@xxxxxxxxxxxxxxx>
>
> The cap_ndoms() helper calculates the maximum available domain ID from
> the value of capability register, which can be inefficient if called
> repeatedly. Cache the maximum supported domain ID in max_domain_id field
> during initialization to avoid redundant calls to cap_ndoms() throughout
> the IOMMU driver.
>
> No functionality change.
>
> Signed-off-by: Lu Baolu<baolu.lu@xxxxxxxxxxxxxxx>
> Signed-off-by: Xu Yilun<yilun.xu@xxxxxxxxxxxxxxx>
> ---
>   drivers/iommu/intel/iommu.h |  1 +
>   drivers/iommu/intel/dmar.c  |  1 +
>   drivers/iommu/intel/iommu.c | 10 +++++-----
>   3 files changed, 7 insertions(+), 5 deletions(-)

This patch has been queued for iommu/next. Thanks!