[PATCH v2 2/6] riscv: insn: Set sstatus.MXR when reading userspace instruction

[Paul Walmsley]

Hi,

On Tue, 28 Jul 2026, Yicong Yang wrote:

> The __read_insn() uses get_user() to read userspace instructions.
> Bo Gan noticed that get_user() is insufficient in this case since
> it's possible for the instruction segment mapped as execute-only
> and get_user() doesn't have permissions to load it. The architecture
> provides sstatus.MXR for handling this so set MXR when reading
> userspace instruction.

If this patch fixes a bug with the preceding patch, it would
better just to roll the fix into the original patch.


- Paul