Re: [PATCH] x86/CPU/AMD: Make sure EFER[AIBRSE] is set
From: Borislav Petkov
Date: Mon Feb 27 2023 - 10:40:39 EST
On Mon, Feb 27, 2023 at 07:25:00AM -0800, Dave Hansen wrote:
> It will freak some users out, but it does seem like the kind of thing we
> _want_ a bug report for.
You mean, something like:
if (spectre_v2_in_ibrs_mode(spectre_v2_enabled) &&
cpu_has(c, X86_FEATURE_AUTOIBRS))
WARN_ON_ONCE(msr_set_bit(MSR_EFER, _EFER_AUTOIBRS));
?
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette