Re: [PATCH v2 2/7] x86/hyper-v: add a function to read both TSC and TSC page value simulateneously

[Thomas Gleixner]

On Wed, 13 Dec 2017, Vitaly Kuznetsov wrote:

> This is going to be used from KVM code where we need to get both
> TSC and TSC page value.
> 
> When Hyper-V code is compiled out just return rdtsc(), this will allow us
> to avoid ugly ifdefs in non-Hyper-V code.

That's not what the patch implements....

> +static inline u64 hv_read_tsc_page_tsc(const struct ms_hyperv_tsc_page 
> *tsc_pg,
> +                                    u64 *cur_tsc)
> +{
> +     BUG();
> +     return U64_MAX;
> +}

Thanks,

        tglx