Re: [PATCH v10 5/5] iommu/arm-smmu: Add global/context fault implementation hooks
From: Will Deacon <will@kernel.org>
Date: 2020-07-13 13:44:59
Also in:
linux-arm-kernel, linux-iommu, linux-tegra, lkml
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@nvidia.com> --- 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