Re: [PATCH 09/11] acpi: bus: Enable HWP CPPC objects

[Rafael J. Wysocki]

On Thursday, August 18, 2016 03:36:50 PM Srinivas Pandruvada wrote:
> Need to set platform wide _OSC bits to enable CPPC and CPPC version 2.
> If platform supports CPPC, then BIOS exposess CPPC tables.
> 
> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
> ---
>  drivers/acpi/bus.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
> index 85b7d07..61643a5 100644
> --- a/drivers/acpi/bus.c
> +++ b/drivers/acpi/bus.c
> @@ -330,6 +330,13 @@ static void acpi_bus_osc_support(void)
>  	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
>  	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
>  
> +#ifdef CONFIG_X86
> +	if (boot_cpu_has(X86_FEATURE_HWP)) {
> +		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT;
> +		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT;
> +	}
> +#endif

Any chance to use IS_ENABLED() here too?

> +
>  	if (!ghes_disable)
>  		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
>  	if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
> 

Thanks,
Rafael