diff options
| -rw-r--r-- | drivers/gpu/drm/xe/xe_bo.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c index 152bdea13d7f..67ed64edd9c6 100644 --- a/drivers/gpu/drm/xe/xe_bo.c +++ b/drivers/gpu/drm/xe/xe_bo.c @@ -2168,10 +2168,35 @@ static const struct vm_operations_struct xe_gem_vm_ops = { .access = xe_bo_vm_access, }; +static int xe_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) +{ + struct xe_bo *bo = gem_to_xe_bo(obj); + int err = 0; + + /* + * Reject mmap of purgeable BOs. DONTNEED BOs can be purged + * at any time, making CPU access undefined behavior. Purged BOs have + * no backing store and are permanently invalid. + */ + err = xe_bo_lock(bo, true); + if (err) + return err; + + if (xe_bo_madv_is_dontneed(bo)) + err = -EBUSY; + else if (xe_bo_is_purged(bo)) + err = -EINVAL; + xe_bo_unlock(bo); + if (err) + return err; + + return drm_gem_ttm_mmap(obj, vma); +} + static const struct drm_gem_object_funcs xe_gem_object_funcs = { .free = xe_gem_object_free, .close = xe_gem_object_close, - .mmap = drm_gem_ttm_mmap, + .mmap = xe_gem_object_mmap, .export = xe_gem_prime_export, .vm_ops = &xe_gem_vm_ops, }; |