Re: [PATCH v5 3/8] platform/x86/amd/pmf: Add feature discovery support to util interface

["Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>]

On Thu, 21 May 2026, Shyam Sundar S K wrote:

> Add feature discovery capability to the util layer interface, allowing
> userspace tools to query which PMF features are supported and enabled
> on the current platform.
> 
> The following features can now be queried through the
> /dev/amdpmf_interface ioctl:
> *  Auto Mode: Automatic power profile switching based on system activity
> *  Static Power Slider: User-selectable power profiles
> *  Policy Builder (Smart PC): Action based policy management
> *  Dynamic Power Slider AC: Adaptive power profiles when on AC power
> *  Dynamic Power Slider DC: Adaptive power profiles when on battery
> 
> Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
> Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
> ---
>  include/uapi/linux/amd-pmf.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/include/uapi/linux/amd-pmf.h b/include/uapi/linux/amd-pmf.h
> index d29a4abe1145..38ab5362fe62 100644
> --- a/include/uapi/linux/amd-pmf.h
> +++ b/include/uapi/linux/amd-pmf.h
> @@ -34,9 +34,19 @@
>  
>  #define AMD_PMF_BIOS_PARAMS_MAX		10
>  
> +/* AMD PMF feature flags - bitmask indicating supported features */
> +#define AMD_PMF_FEAT_AUTO_MODE			BIT(0)
> +#define AMD_PMF_FEAT_STATIC_POWER_SLIDER	BIT(1)
> +#define AMD_PMF_FEAT_POLICY_BUILDER		BIT(2)
> +#define AMD_PMF_FEAT_DYNAMIC_POWER_SLIDER_AC	BIT(3)
> +#define AMD_PMF_FEAT_DYNAMIC_POWER_SLIDER_DC	BIT(4)

Sashiko notes you lack an include for BIT().

> +
>  struct amd_pmf_info {
>  	__u64 size;
>  
> +	/* Feature info */
> +	__u32 features_supported;
> +
>  	/* Power and state info */
>  	__u32 platform_type;
>  	__u32 power_source;
> 

-- 
 i.