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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 17.07.18 at 12:38, <roger.pau@xxxxxxxxxx> wrote:
> Level triggered interrupts are not an optional feature of HPET, and
> must be implemented in order to comply with the HPET specification.
> 
> Implement them by adding a callback to the timer which sets the
> interrupt bit in the general interrupt status register. Further
> interrupts (in case of periodic mode) will not be injected until the
> bit is cleared.
> 
> In order to reset the interrupts when the status bit is clear Xen must
> also detect accesses to such register.
> 
> While there convert tn and i in hpet_write to unsigned.
> 
> Reported-by: Stefan Bader <stefan.bader@xxxxxxxxxxxxx>
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>


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