Re: Intel i7-1165G7 vulnerable to Spectre v2

[Christian Gelinek]

On 1/2/23 15:58, Tobias Geerinckx-Rice wrote:
> Christian Gelinek 写道：
> > Spectre v2: Vulnerable: eIBRS with unprivileged eBPF
> […]
> > Spectre v2: Mitigation; Enhanced IBRS, IBPB conditional, RSB filling, 
> > PBRSB-eIBRS SW sequence
>
> Does
>
>   $ echo 1 | sudo tee /proc/sys/kernel/unprivileged_bpf_disabled
>
> change this?

It does, thank you! This is the updated output line of `lscpu`:

Spectre v2: Mitigation; Enhanced IBRS, IBPB conditional, RSB filling, 
PBRSB-eIBRS SW sequence

which matches the output I saw when I was running Debian 11.

How can I make this change permanent, ideally surviving both reboots as 
well as `guix system reconfigure` invocations?

Or do we think this will be soon compiled into the kernel, if I 
understood Remco's message [0] and your response [1] to that correctly, 
and therefore coming "for free" (for me, anyway) by `reconfigure`ing?

Kinde regards,
Christian

[0]: https://lists.gnu.org/archive/html/help-guix/2023-02/msg00008.html
[1]: https://lists.gnu.org/archive/html/help-guix/2023-02/msg00009.html