Re: [Xen-devel] [RFC PATCH 17/49] ARM: timer: Handle level triggered IRQs correctly

2018-02-13 Thread Julien Grall
On 12/02/18 18:23, Andre Przywara wrote: Hi, Hi Andre, On 12/02/18 15:19, Julien Grall wrote: Hi Andre, On 09/02/18 14:39, Andre Przywara wrote: The ARM Generic Timer uses a level-sensitive interrupt semantic. We easily catch when the line goes high, as this triggers the hardware IRQ. Ho

Re: [Xen-devel] [RFC PATCH 17/49] ARM: timer: Handle level triggered IRQs correctly

2018-02-12 Thread Andre Przywara
Hi, On 12/02/18 15:19, Julien Grall wrote: > Hi Andre, > > On 09/02/18 14:39, Andre Przywara wrote: >> The ARM Generic Timer uses a level-sensitive interrupt semantic. We >> easily catch when the line goes high, as this triggers the hardware IRQ. >> However we have to sync the state of the interr

Re: [Xen-devel] [RFC PATCH 17/49] ARM: timer: Handle level triggered IRQs correctly

2018-02-12 Thread Julien Grall
Hi Andre, On 09/02/18 14:39, Andre Przywara wrote: The ARM Generic Timer uses a level-sensitive interrupt semantic. We easily catch when the line goes high, as this triggers the hardware IRQ. However we have to sync the state of the interrupt condition at certain points to catch when the line go