Re: [PATCH] x86/CPU/AMD: Make sure EFER[AIBRSE] is set

[Dave Hansen]

On 2/27/23 07:40, Borislav Petkov wrote:
> 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));
> 
> ?

Yep, that looks sane.