Re: [Xen-devel] [PATCH] x86/MSI: fix guest unmasking when handling IRQ via event channel

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Wed, 2015-07-08 at 09:56 +0100, Jan Beulich wrote:
> Rather than assuming only PV guests need special treatment (and
> dealing with that directly when an IRQ gets set up), keep all guest MSI
> IRQs masked until either the (HVM) guest unmasks them via vMSI or the
> (PV, PVHVM, or PVH) guest sets up an event channel for it.
> 
> To not further clutter the common evtchn_bind_pirq() with x86-specific
> code, introduce an arch_evtchn_bind_pirq() hook instead.
> 
> Reported-by: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> Tested-by: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>


For the ARM impact; Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>



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