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Re: [PATCH v2] xen/arm: implement GICD_I[S/C]ACTIVER reads

On 07/04/2020 17:25, Bertrand Marquis wrote:
This is possible to do on a per interrupt basis or when all interrupts in LR registers have all been handled (maintenance interrupt when there is nothing left to handle in LR registers, used to fire other interrupts if we have more pending interrupts then number of LR registers).

Maybe a solution making sure we get a maintenance interrupts once all interrupts in LR registers have been handled could be a good mitigation ?

The chance of having multiple interrupts inflight is fairly limited. So effectively, you will trap for every interrupts.


Julien Grall



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