Re: [Xen-devel] [PATCH v4 7/7] x86/tlb: use Xen L0 assisted TLB flush when available

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Mon, Feb 10, 2020 at 06:28:29PM +0100, Roger Pau Monne wrote:
> @@ -256,6 +257,16 @@ void flush_area_mask(const cpumask_t *mask, const void 
> *va, unsigned int flags)
>      if ( (flags & ~FLUSH_ORDER_MASK) &&
>           !cpumask_subset(mask, cpumask_of(cpu)) )
>      {
> +        if ( cpu_has_hypervisor &&
> +             !(flags & ~(FLUSH_TLB | FLUSH_TLB_GLOBAL | FLUSH_VA_VALID |
> +                         FLUSH_ORDER_MASK)) &&
> +             !hypervisor_flush_tlb(mask, va, flags & FLUSH_ORDER_MASK) )

This needs to be adjusted to (flags - 1) & FLUSH_ORDER_MASK.

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