Re: [PATCH v6 6/9] x86/vmscape: Use static_call() for predictor flush

[Nikolay Borisov]

On 2.12.25 г. 8:20 ч., Pawan Gupta wrote:
> Adding more mitigation options at exit-to-userspace for VMSCAPE would
> usually require a series of checks to decide which mitigation to use. In
> this case, the mitigation is done by calling a function, which is decided
> at boot. So, adding more feature flags and multiple checks can be avoided
> by using static_call() to the mitigating function.
>
> Replace the flag-based mitigation selector with a static_call(). This also
> frees the existing X86_FEATURE_IBPB_EXIT_TO_USER.
>
> Suggested-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
> Signed-off-by: Pawan Gupta <pawan.kumar.gupta@xxxxxxxxxxxxxxx>

Reviewed-by: Nikolay Borisov <nik.borisov@xxxxxxxx>