On Mon, Jun 23, 2025 at 04:42:41PM +0300, Kirill A. Shutemov wrote:
> Due to SLAM, we decided to postpone LAM enabling, until LASS is landed.
>
> I am not sure if we want to add static
> /sys/devices/system/cpu/vulnerabilities/slam with "Mitigation: LASS".
>
> There might be other yet-to-be-discovered speculative attacks that LASS
> mitigates. Security features have to visible to userspace independently of
> known vulnerabilities.
... and the fact that a vuln is being mitigated by stating that in
/sys/devices/system/cpu/vulnerabilities/ needs to happen too.
I'm not talking about LAM enablement - I'm talking about adding a
SPECTRE_V1_MITIGATION_LASS
and setting that when X86_FEATURE_LASS is set so that luserspace gets told
that
"Spectre V1 : Mitigation: LASS"
or so.
Makes more sense?
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
