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> } > > +static const u32 region_to_mem_type[] = { > + XE_PL_TT, > + XE_PL_VRAM0, > + XE_PL_VRAM1, > +}; > + > /** > * xe_svm_handle_pagefault() - SVM handle page fault > * @vm: The VM. > @@ -796,6 +802,7 @@ int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma, > struct xe_tile *tile = gt_to_tile(gt); > int retry_count = 3; > ktime_t end = 0; > + u32 region; > int err; > > lockdep_assert_held_write(&vm->lock); > @@ -820,7 +827,13 @@ int xe_svm_handle_pagefault(struct xe_vm *vm, struct xe_vma *vma, > > range_debug(range, "PAGE FAULT"); > > - if (xe_svm_range_needs_migrate_to_vram(range, vma, IS_DGFX(vm->xe))) { > + region = vma->attr.preferred_loc.devmem_fd; Mentioned this earlier in the series - you are assiging a devmem_fd to a region which is a bit confusing. > + > + if (xe_svm_range_needs_migrate_to_vram(range, vma, region)) { > + region = region ? region : 1; I think the default (region unset) should be the VRAM closest to the GT of the fault. > + /* Need rework for multigpu */ > + tile = &vm->xe->tiles[region_to_mem_type[region] - XE_PL_VRAM0]; > + > err = xe_svm_alloc_vram(vm, tile, range, &ctx); > if (err) { > if (retry_count) { > diff --git a/drivers/gpu/drm/xe/xe_vm.h b/drivers/gpu/drm/xe/xe_vm.h > index 4e45230b7205..377f62f859b7 100644 > --- a/drivers/gpu/drm/xe/xe_vm.h > +++ b/drivers/gpu/drm/xe/xe_vm.h > @@ -220,6 +220,9 @@ int __xe_vm_userptr_needs_repin(struct xe_vm *vm); > > int xe_vm_userptr_check_repin(struct xe_vm *vm); > > +bool xe_vma_has_preferred_mem_loc(struct xe_vma *vma, > + u32 *mem_region, u32 *devmem_fd); > + > int xe_vm_rebind(struct xe_vm *vm, bool rebind_worker); > struct dma_fence *xe_vma_rebind(struct xe_vm *vm, struct xe_vma *vma, > u8 tile_mask); > diff --git a/drivers/gpu/drm/xe/xe_vm_madvise.c b/drivers/gpu/drm/xe/xe_vm_madvise.c > index 7e1a95106cb9..f870e8642190 100644 > --- a/drivers/gpu/drm/xe/xe_vm_madvise.c > +++ b/drivers/gpu/drm/xe/xe_vm_madvise.c > @@ -61,7 +61,25 @@ static int madvise_preferred_mem_loc(struct xe_device *xe, struct xe_vm *vm, > struct xe_vma **vmas, int num_vmas, > struct drm_xe_madvise_ops ops) > { > - /* Implementation pending */ > + s32 devmem_fd; > + u32 migration_policy; > + int i; > + > + xe_assert(vm->xe, ops.type == DRM_XE_VMA_ATTR_PREFERRED_LOC); > + vm_dbg(&xe->drm, "migration policy = %d, devmem_fd = %d\n", > + ops.preferred_mem_loc.migration_policy, > + ops.preferred_mem_loc.devmem_fd); As mentioned in patch #27, I'm not sure this debug info is all that useful. > + > + devmem_fd = (s32)ops.preferred_mem_loc.devmem_fd; > + devmem_fd = (devmem_fd < 0) ? 0 : devmem_fd; > + Why (devmem_fd < 0) ? 0? I'm not following this. > + migration_policy = ops.preferred_mem_loc.migration_policy; > + Mentioned earlier in the series, I'm confused by migration_policy and it also looks to be unused unless I'm missing something? Matt > + for (i = 0; i < num_vmas; i++) { > + vmas[i]->attr.preferred_loc.devmem_fd = devmem_fd; > + vmas[i]->attr.preferred_loc.migration_policy = migration_policy; > + } > + > return 0; > } > > -- > 2.34.1 >