Beth Kon wrote:
The big change here is handling of enabling/disabling of hpet legacy mode. When hpet enters
legacy mode, the spec says that the pit stops generating interrupts. In practice, we want to
stop the pit periodic timer from running because it is wasteful in a virtual environment.
We also have to worry about the hpet leaving legacy mode (which, at least in linux, happens
only during a shutdown or crash). At this point, according to the hpet spec, PIT interrupts
need to be reenabled. For us, it means the PIT timer needs to be restarted.
This patch handles this situation better than the previous version by coming closer to
just disabling PIT interrupts. It allows the PIT state to change if the OS modifies it,
even while PIT is disabled, but does not allow a pit timer to start. Then if HPET
legacy mode is disabled, whatever the PIT state is at that point, the PIT timer is
restarted accordingly.
Given that this depends on the ABI-breaking patch 5, I've dropped it too.
--
error compiling committee.c: too many arguments to function
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