From 7c0c19c076ffe84b8bcd5f927eb47452837f2c99 Mon Sep 17 00:00:00 2001 From: Matthew Brost Date: Tue, 6 Jan 2026 13:34:43 -0800 Subject: [PATCH] drm/xe: Validate preferred system memory placement in xe_svm_range_validate MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Fixes: 238dbc9d9f4a ("drm/xe: Use the vma attibute drm_pagemap to select where to migrate") Signed-off-by: Matthew Brost Reviewed-by: Himal Prasad Ghimiray Link: https://patch.msgid.link/20260106213443.1866797-1-matthew.brost@intel.com --- drivers/gpu/drm/xe/xe_svm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_svm.c b/drivers/gpu/drm/xe/xe_svm.c index fa2ee2c08f31..213f0334518a 100644 --- a/drivers/gpu/drm/xe/xe_svm.c +++ b/drivers/gpu/drm/xe/xe_svm.c @@ -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); -- 2.47.3