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accel/amdxdna: Reject device heap BO when dev_mem_size is not set

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NPU3 devices do not set dev_mem_size, since they do not use a device
heap. Creating an AMDXDNA_BO_DEV_HEAP BO on such a device hits the
WARN_ON(!is_power_of_2(dev_mem_size)) check, which any user with
access to the device node can trigger.

Return -EOPNOTSUPP when dev_mem_size is 0.

Fixes: d76856beb4 ("accel/amdxdna: Refactor GEM BO handling and add helper APIs for address retrieval")
Signed-off-by: David Zhang <yidong.zhang@amd.com>
Reviewed-by: Lizhi Hou <lizhi.hou@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20261008232416.2646054-1-yidong.zhang@amd.com
This commit is contained in:
David Zhang 2026-10-08 16:24:16 -07:00 committed by Lizhi Hou
parent fc9370d7b1
commit 3e32932d36
1 changed files with 5 additions and 0 deletions
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5
drivers/accel/amdxdna/amdxdna_gem.c
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@ -1140,6 +1140,11 @@ amdxdna_drm_create_dev_heap_bo(struct drm_device *dev,
struct amdxdna_gem_obj *abo;
int ret;
if (!xdna->dev_info->dev_mem_size) {
XDNA_DBG(xdna, "Device heap is not supported");
return ERR_PTR(-EOPNOTSUPP);
}
WARN_ON(!is_power_of_2(xdna->dev_info->dev_mem_size));
XDNA_DBG(xdna, "Requested dev heap size 0x%llx", args->size);
if (!args->size || !IS_ALIGNED(args->size, xdna->dev_info->dev_mem_size)) {