Re: [Xen-devel] [PATCH v5 1/6] x86/hvm: Collect information of TSC scaling ratio

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 02/22/2016 09:04 PM, Haozhong Zhang wrote:

>   
> +    if ( cpu_has_tsc_ratio )
> +        svm_function_table.tsc_scaling.ratio_frac_bits = 32;
> +

>   
> +#define hvm_tsc_scaling_supported \
> +    (!!hvm_funcs.tsc_scaling.ratio_frac_bits)
> +
What is the difference (in usage) between cpu_has_tsc_ratio and 
hvm_tsc_scaling_supported? Isn't the first imply the second (and if yes 
then what's the reason for having the latter)?
-boris

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