[RFC PATCH 27/33] irqchip/gic-v3-its: Add VPE interrupt masking

[Thomas Gleixner]

On Tue, 17 Jan 2017, Marc Zyngier wrote:

> When masking/unmasking a doorbell interrupt, it is necessary
> to issue an invalidation to the corresponding redistributor.
> We use the DirectLPI feature by writting directly to the corresponding
> redistributor.
> 
> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>

Reviewed-by: Thomas Gleixner <tglx at linutronix.de>