Another refresh to support split pagetables for Adreno GPUs as part of an incremental process to enable per-context pagetables. In order to support per-context pagetables the GPU needs to enable split tables so that we can store global buffers in the TTBR1 space leaving the GPU free to program the TTBR0 register with the address of a context specific pagetable. This patchset adds split pagetable support if requested by the domain owner via the DOMAIN_ATTR_SPLIT_TABLES attribute. If the attribute is non zero at attach time, the implementation will set up the TTBR0 and TTBR1 spaces with identical configurations and program the domain pagetable into the TTBR1 register. The TTBR0 register will be unused. The driver can determine if split pagetables were programmed by querying DOMAIN_ATTR_SPLIT_TABLES after attaching. The domain geometry will also be updated to reflect the virtual address space for the TTBR1 range. These patches are on based on top of linux-next-20191216 with [1], [2], and [3] from Robin on the iommu list. Change log: v3: Remove the implementation specific and make split pagetable support part of the generic configuration [1] https://lists.linuxfoundation.org/pipermail/iommu/2019-October/039718.html [2] https://lists.linuxfoundation.org/pipermail/iommu/2019-October/039719.html [3] https://lists.linuxfoundation.org/pipermail/iommu/2019-October/039720.html Jordan Crouse (5): iommu: Add DOMAIN_ATTR_SPLIT_TABLES iommu/arm-smmu: Add support for split pagetables drm/msm: Attach the IOMMU device during initialization drm/msm: Refactor address space initialization drm/msm/a6xx: Support split pagetables drivers/gpu/drm/msm/adreno/a2xx_gpu.c | 16 ++++++++++ drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 1 + drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 1 + drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 1 + drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 51 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/msm/adreno/adreno_gpu.c | 23 ++++++++++---- drivers/gpu/drm/msm/adreno/adreno_gpu.h | 8 +++++ drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 18 ++++------- drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 18 +++++------ drivers/gpu/drm/msm/disp/mdp5/mdp5_cfg.c | 4 --- drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 18 +++++------ drivers/gpu/drm/msm/msm_drv.h | 8 ++--- drivers/gpu/drm/msm/msm_gem_vma.c | 37 +++++------------------ drivers/gpu/drm/msm/msm_gpu.c | 49 ++---------------------------- drivers/gpu/drm/msm/msm_gpu.h | 4 +-- drivers/gpu/drm/msm/msm_gpummu.c | 6 ---- drivers/gpu/drm/msm/msm_iommu.c | 18 ++++++----- drivers/gpu/drm/msm/msm_mmu.h | 1 - drivers/iommu/arm-smmu.c | 40 +++++++++++++++++++++---- drivers/iommu/arm-smmu.h | 45 ++++++++++++++++++++++++---- include/linux/iommu.h | 1 + 21 files changed, 215 insertions(+), 153 deletions(-) -- 2.7.4
