Looking at kernel 4.9, the RTC_UIE_ON ioctl sets an alarm via the cmos_rtc driver. This does a couple of things.
1. Disables the CMOS RTC alarm interrupt, writes an alarm time to the CMOS RTC, then enables the alarm interrupt. 2. When configured to emulate an RTC using the HPET (which our kernel is), makes sure HPET timer 1 is initialized for RTC emulation. Based on this I looked at the diffs for hw/timer/mc146818rtc.c (which seems to be the CMOS RTC device) and hw/timer/hpet.c between the two qemu versions. The differences all look pretty trivial, I don't see anything which looks like it would have fixed the problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1649718 Title: Linux rtc self test fails in a VM under xenial To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1649718/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
