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drm/xe: Validate preferred system memory placement in xe_svm_range_validate

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Ensure preferred system memory placement is checked in
xe_svm_range_validate when dpagemap is NULL. Without this check, a
prefetch to system memory may become a no-op because device memory is
considered a valid placement.

Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Fixes: 238dbc9d9f ("drm/xe: Use the vma attibute drm_pagemap to select where to migrate")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patch.msgid.link/20260106213443.1866797-1-matthew.brost@intel.com
This commit is contained in:
Matthew Brost
2026-01-06 13:34:43 -08:00
parent 051114652b
commit 7c0c19c076
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/xe/xe_svm.c
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@@ -988,6 +988,8 @@ bool xe_svm_range_validate(struct xe_vm *vm,
ret = (range->tile_present & ~range->tile_invalidated & tile_mask) == tile_mask;
if (dpagemap)
ret = ret && xe_svm_range_has_pagemap_locked(range, dpagemap);
else
ret = ret && !range->base.pages.dpagemap;
xe_svm_notifier_unlock(vm);