Re: [PATCH v10 5/5] iommu/arm-smmu: Add global/context fault implementation hooks

[Will Deacon]

On Tue, Jul 07, 2020 at 10:00:17PM -0700, Krishna Reddy wrote:
> Add global/context fault hooks to allow vendor specific implementations
> override default fault interrupt handlers.
> 
> Update NVIDIA implementation to override the default global/context fault
> interrupt handlers and handle interrupts across the two ARM MMU-500s that
> are programmed identically.
> 
> Signed-off-by: Krishna Reddy <vdumpa@xxxxxxxxxx>
> ---
>  drivers/iommu/arm-smmu-nvidia.c | 99 +++++++++++++++++++++++++++++++++
>  drivers/iommu/arm-smmu.c        | 17 +++++-
>  drivers/iommu/arm-smmu.h        |  3 +
>  3 files changed, 117 insertions(+), 2 deletions(-)

Given that faults shouldn't occur during normal operation, is this patch
actually necessary?

Will