Re: [Xen-devel] [PATCH v7 23/32] xen/x86: make sure the HVM callback vector is correctly set

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 02.10.15 at 17:48, <roger.pau@xxxxxxxxxx> wrote:
> --- a/xen/arch/x86/hvm/irq.c
> +++ b/xen/arch/x86/hvm/irq.c
> @@ -330,6 +330,10 @@ void hvm_set_callback_via(struct domain *d, uint64_t 
> via)
>           (via_type > HVMIRQ_callback_vector) )
>          via_type = HVMIRQ_callback_none;
>  
> +    if ( via_type != HVMIRQ_callback_vector &&
> +         (!has_vlapic(d) || !has_vioapic(d) || !has_vpic(d)) )
> +        return;

Why are both IO-APIC and PIC required? Doesn't one suffice, or
can't MSI-like interrupts even get delivered without either?

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel