Re: [PATCH v5 10/13] x86/process: Clear hardware feedback history for AMD processors

[Borislav Petkov]

On Sun, Oct 27, 2024 at 09:02:48PM -0500, Mario Limonciello wrote:
> +__always_inline void reset_hardware_history_hetero(void)
> +{
> +	if (static_branch_unlikely(&hardware_history_features))
> +		wrmsrl(AMD_WORKLOAD_HRST, 0x1);

Get rid of all of the other crap - the static key and that
reset_hardware_history_hetero() silly thing and do

	/* Reset hw history on AMD CPUs */
	if (cpu_feature_enabled(X86_FEATURE_AMD_WORKLOAD_CLASS))
		wrmsrl(AMD_WORKLOAD_HRST, 0x1);

in __switch_to().

Nothing else.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette