Re: [PATCH v5 06/10] x86/hyper-v: implement rep hypercalls

[Andy Shevchenko]

On Tue, May 30, 2017 at 2:34 PM, Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> wrote:
> Rep hypercalls are normal hypercalls which perform multiple actions at
> once. Hyper-V guarantees to return exectution to the caller in not more
> than 50us and the caller needs to use hypercall continuation. Touch NMI
> watchdog between hypercall invocations.
>
> This is going to be used for HvFlushVirtualAddressList hypercall for
> remote TLB flushing.


> +       control |= (u64)varhead_size << 17; /* Variable header size */
> +       control |= (u64)rep_count << 32; /* Rep Count */

> +               control &= U64_MAX >> 16;
> +               control |= (u64)rep_comp << 48;

It might make sense to define magics with appropriate names.

-- 
With Best Regards,
Andy Shevchenko