Re: [Xen-devel] [PATCH v4 1/2] vpt: add support for level interrupts

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 17.07.18 at 12:38, <roger.pau@xxxxxxxxxx> wrote:
> Level trigger interrupts will be asserted regardless of whether the
> interrupt is masked, and thus the callback will also be executed.
> 
> Add a new 'level' parameter to create_periodic_time in order to create
> level triggered timers. None of the current users of vpt are switched
> to use level triggered interrupts yet.
> 
> Note that periodic level triggered interrupts are not supported. This
> is because level triggered interrupts always require a deassert of the
> IO-APIC pin, which should be done by the caller of vpt at which point
> the caller should also reset the timer if required.
> 
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>


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