Re: [PATCH 4/4] x86,module: Detect CRn and DRn manipulation

Nadav Amit
2020-04-07T18:55:30Z

> On Apr 7, 2020, at 4:02 AM, Peter Zijlstra <peterz@infradead.org> wrote:
>
> Since we now have infrastructure to analyze module text, disallow
> modules that write to CRn and DRn registers.

Assuming the kernel is built without CONFIG_PARAVIRT, what is the right way
for out-of-tree modules to write to CRs? Let’s say CR2?