Re: [PATCH 1/1] iommu/vt-d: Preset Access/Dirty bits for IOVA over FL

[Joerg Roedel]

On Fri, Jan 15, 2021 at 08:42:02AM +0800, Lu Baolu wrote:
> The Access/Dirty bits in the first level page table entry will be set
> whenever a page table entry was used for address translation or write
> permission was successfully translated. This is always true when using
> the first-level page table for kernel IOVA. Instead of wasting hardware
> cycles to update the certain bits, it's better to set them up at the
> beginning.
> 
> Suggested-by: Ashok Raj <ashok.raj@xxxxxxxxx>
> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> ---
>  drivers/iommu/intel/iommu.c | 14 ++++++++++++--
>  include/linux/intel-iommu.h |  2 ++
>  2 files changed, 14 insertions(+), 2 deletions(-)

Applied, thanks.