Change Details

pmap_change_attr is required by drm-kmod so we need the function to exist. Since the Svpbmt extension is on the horizon we will likely end up with a real implementation of it, so this stub implementation does all the necessary page table walking to validate the input, ensuring that no new errors are returned once it's implemented fully (other than due to out of memory conditions when demoting L2 entries) and providing a skeleton for that future implementation.

pmap_change_attr is required by drm-kmod so we need the function to exist. Since the Svpbmt extension is on the horizon we will likely end up with a real implementation of it, so this stub implementation does all the necessary page table walking to validate the input, ensuring that no new errors are returned once it's implemented fully (other than due to out of memory conditions when demoting L2 entries) and providing a skeleton for that future implementation. MFC after: 1 week

pmap_change_attr is required by drm-kmod so we need the function to exist. Since the Svpbmt extension is on the horizon we will likely end up with a real implementation of it, so this stub implementation does all the necessary page table walking to validate the input, ensuring that no new errors are returned once it's implemented fully (other than due to out of memory conditions when demoting L2 entries) and providing a skeleton for that future implementation. MFC after: 1 week