# Re: \[PATCH v2\] sparc64: Add support for Application Data Integrity (ADI)

- From: David Miller \<davem@davemloft.net\>
- Date: 2016-03-07 19:20:05 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2016/03/4703185
- Thread: https://ratatoskr.run/sparclinux/2016/03/4699675/t.md

```text
From: Andy Lutomirski <luto@amacapital.net>
Date: Mon, 7 Mar 2016 10:49:57 -0800

> What data structure or structures changes when this stxa instruction happens?

An internal table, maintained by the CPU and/or hypervisor, and if in physical
addresses then in a region which is only accessible by the hypervisor.

The table is not accessible by the kernel at all via loads or stores.
```