[PATCH 1/5] iommu/arm-smmu-v3: Add feature detection for HTTU

[Jason Gunthorpe]

On Tue, Nov 28, 2023 at 09:49:36AM +0000, Shameer Kolothum wrote:
> From: Jean-Philippe Brucker <jean-philippe at linaro.org>
> 
> If the SMMU supports it and the kernel was built with HTTU support,
> Probe support for Hardware Translation Table Update (HTTU) which is
> essentially to enable hardware update of access and dirty flags.
> 
> Probe and set the smmu::features for Hardware Dirty and Hardware Access
> bits. This is in preparation, to enable it on the context descriptors of
> stage 1 format.
> 
> Link: https://lore.kernel.org/lkml/20210413085457.25400-5-zhukeqian1@huawei.com/
> Signed-off-by: Jean-Philippe Brucker <jean-philippe at linaro.org>
> [joaomart: Change commit message to reflect the underlying changes,
>  the Link points to the original version this was based]
> Signed-off-by: Joao Martins <joao.m.martins at oracle.com>
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi at huawei.com>
> ---
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 32 +++++++++++++++++++++
>  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h |  5 ++++
>  2 files changed, 37 insertions(+)

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Jason