Hello Oleksandr-san,
> From: Oleksandr Tyshchenko, Sent: Sunday, November 28, 2021 2:52 AM
>
> From: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com>
>
> This is a non-verbatim port of corresponding Linux upsteam commit:
> 3667c9978b2911dc1ded77f5971df477885409c4
>
> Original commit message:
> commit 3667c9978b2911dc1ded77f5971df477885409c4
> Author: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com>
> Date: Wed Nov 6 11:35:49 2019 +0900
>
> iommu/ipmmu-vmsa: Add helper functions for "uTLB" registers
>
> Since we will have changed memory mapping of the IPMMU in the future,
> This patch adds helper functions ipmmu_utlb_reg() and
> ipmmu_imu{asid,ctr}_write() for "uTLB" registers. No behavior change.
>
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com>
> Reviewed-by: Geert Uytterhoeven <geert+rene...@glider.be>
> Reviewed-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
> Signed-off-by: Joerg Roedel <jroe...@suse.de>
>
> **********
>
> This is a prereq work needed to add support for S4 series easily
> in the future.
>
> Besides changes done in the original commit, we also need to introduce
> ipmmu_imuctr_read() since Xen driver contains an additional logic in
> ipmmu_utlb_enable() to prevent the use cases where devices which use
> the same micro-TLB are assigned to different Xen domains.
>
> No change in behavior.
>
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com>
Thank you for the patch!
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com>
Best regards,
Yoshihiro Shimoda
