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An exporter on drm_gem_prime_dmabuf_ops has >> no .pin, and drm_gem_ttm_vmap() answers iomem for a VRAM resident >> object, so an NPU paired with nouveau or radeon does. >> >> Refuse the mapping. vmw_gem_vmap() does the same; unlike that one this >> path is reachable from an unprivileged ioctl, so it does not warn. >> >> Signed-off-by: Taimuraz Kaitmazov >> --- >>   drivers/accel/amdxdna/amdxdna_gem.c | 10 ++++++++-- >>   1 file changed, 8 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/accel/amdxdna/amdxdna_gem.c b/drivers/accel/amdxdna/amdxdna_gem.c >> index 1f190b319bb..b66ec9e4828 100644 >> --- a/drivers/accel/amdxdna/amdxdna_gem.c >> +++ b/drivers/accel/amdxdna/amdxdna_gem.c >> @@ -683,10 +683,16 @@ static int amdxdna_gem_obj_vmap(struct drm_gem_object *obj, struct iosys_map *ma >>         dma_resv_assert_held(obj->resv); >>   -    if (is_import_bo(abo)) >> +    if (is_import_bo(abo)) { >>           ret = dma_buf_vmap(abo->dma_buf, map); Mhm, why does amdxdna a vmap in the first place? For some workaround? Usually DMA-buf only provides that framebuffer emulation scanout inside the kernel. On the other hand as far as I can see that here should work correctly. Regards, Christian. >> -    else >> +        /* Callers use mem.kva as an ordinary kernel address. */ >> +        if (!ret && map->is_iomem) { >> +            dma_buf_vunmap(abo->dma_buf, map); >> +            return -EOPNOTSUPP; >> +        } > > Thanks for the fix. The 'is_iomem' check should be moved to amdxdna_gem_vmap() to cover all the cases. > > Lizhi > >> +    } else { >>           ret = drm_gem_shmem_object_vmap(obj, map); >> +    } >>       if (ret) >>           return ret; >>       if (!map->vaddr)