On 19/07/17 10:33, Anup Patel wrote: > This patchset primarily adds Broadcom FlexRM reset module for > VFIO platform driver. We also have minor improvments in IOMMU > and VFIO driver to allow VFIO no-IOMMU mode access to FlexRM. I'm struggling to understand the IOMMU changes here - what's the FlexRM's hardware relationship with the IOMMU, and how is it different from any other device? Furthermore, if there *is* a relevant IOMMU present, why would no-IOMMU mode need to be involved at all? Robin. > The patches are based on Linux-4.13-rc1 and can also be > found at flexrm-vfio-v1 branch of > https://github.com/Broadcom/arm64-linux.git > > Anup Patel (5): > iommu: Add capability IOMMU_CAP_BYPASS > iommu/arm-smmu: add IOMMU_CAP_BYPASS to the ARM SMMU driver > iommu/arm-smmu-v3: add IOMMU_CAP_BYPASS to the ARM SMMUv3 driver > vfio: Allow No-IOMMU mode for IOMMUs with bypass capability > vfio: platform: reset: Add Broadcom FlexRM reset module > > drivers/iommu/arm-smmu-v3.c | 2 + > drivers/iommu/arm-smmu.c | 2 + > drivers/vfio/platform/reset/Kconfig | 9 +++ > drivers/vfio/platform/reset/Makefile | 1 + > .../vfio/platform/reset/vfio_platform_bcmflexrm.c | 91 ++++++++++++++++++++++ > drivers/vfio/vfio.c | 13 +++- > include/linux/iommu.h | 4 + > 7 files changed, 119 insertions(+), 3 deletions(-) > create mode 100644 drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c >
