Thank you for checking this issue. I looked at the ptimer code, like you said. Just one question: isn't this used by other hw as well? Maybe this problem is more general...
I also tried (basically) the same example on a aarch64 (raspberry pi3), and I don't find any problems there. Maybe could be helpful to look how this problem is solved there. Just trying to help -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1777777 Title: arm9 clock pending (SP804) Status in QEMU: Confirmed Bug description: Hello all, I'm using the versatilepb board and the timer Interrupt Mask Status register (offset 0x14 of the SP804) does not seem to be working properly on the latest qemu-2.12. I tried on the 2.5 (i believe this is the mainstream version that comes with Linux) and it works perfectly. What happens is that the pending bit does not seem to be set in some scenarios. In my case, I see the timer value decreasing to 0 and then being reset to the reload value and neither does the interrupt is triggered nor the pending bit is set. I believe this is a matter of timing since in the "long" run the system eventually catches up (after a few microseconds). Thank you To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1777777/+subscriptions
