Re: [PATCH v2 0/2] drm/amdgpu: per-PTE MTYPE override for NUMA locality

[Philip Yang <yangp@amd.com>]

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ping...

On 2026-04-20 09:37, Philip Yang wrote:
> This series refactors the NUMA-aware MTYPE override for VM page table
> entries on GFX 9.4.3 APUs (MI300A). Previously, the override was applied
> once per contiguous range in the centralized amdgpu_vm_pte_update_flags(),
> which missed scattered pages (pages_addr path) that could span multiple
> NUMA nodes.
>
> Patch 1 moves amdgpu_device_check_iommu_direct_map() earlier in device
> init so that ram_is_direct_mapped is available when gmc_funcs are
> configured during IP early init.
>
> Patch 2 moves the MTYPE override into the individual CPU and SDMA update
> backends at per-PTE granularity, enabling correct NUMA-local MTYPE
> selection for scattered pages. It also hoists the eligibility checks
> (APU type, IP version, direct-mapped RAM, multi-NUMA) from runtime to
> init time via a new gmc.override_pte flag, avoiding repeated checks on
> every PTE update.
>
> Philip Yang (2):
>    drm/amdgpu: Move amdgpu_device_check_iommu_direct_map() earlier
>    drm/amdgpu: move VM PTE MTYPE override to per-PTE granularity
>
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c  |  5 +--
>   drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h     |  2 ++
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c      |  2 +-
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h      |  6 ++--
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm_cpu.c  | 11 ++++++-
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c   |  9 ------
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c | 11 ++++++-
>   drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c       | 35 +++++++++------------
>   8 files changed, 44 insertions(+), 37 deletions(-)
>

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