Re: [PATCH v2 3/5] x86/cpu: Enable SD_ASYM_PACKING for PKG Domain on AMD Processors

["Gautham R. Shenoy" <gautham.shenoy@amd.com>]

On Mon, Oct 21, 2024 at 10:46:06PM -0500, Mario Limonciello wrote:
> From: Perry Yuan <perry.yuan@amd.com>
> 
> Enable the SD_ASYM_PACKING domain flag for the PKG domain on AMD
> heterogeneous processors.
> This flag is beneficial for processors with one or more CCDs and
> relies on x86_sched_itmt_flags().
> 
> Signed-off-by: Perry Yuan <perry.yuan@amd.com>
> Co-developed-by: Mario Limonciello <mario.limonciello@amd.com>
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>

> ---
>  arch/x86/kernel/smpboot.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
> index 766f092dab80b..b5a8f0891135b 100644
> --- a/arch/x86/kernel/smpboot.c
> +++ b/arch/x86/kernel/smpboot.c
> @@ -497,8 +497,9 @@ static int x86_cluster_flags(void)
>  
>  static int x86_die_flags(void)
>  {
> -	if (cpu_feature_enabled(X86_FEATURE_HYBRID_CPU))
> -	       return x86_sched_itmt_flags();
> +	if (cpu_feature_enabled(X86_FEATURE_HYBRID_CPU) ||
> +	    cpu_feature_enabled(X86_FEATURE_AMD_HETEROGENEOUS_CORES))
> +		return x86_sched_itmt_flags();
>  
>  	return 0;
>  }
> -- 
> 2.43.0
>