[Xen-bugs] [Bug 1513] New: i8254 mode0 problem

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1513

           Summary: i8254 mode0 problem
           Product: Xen
           Version: 3.0 (general)
          Platform: x86
               URL: http://www.haiku-os.org
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HVM
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: stefano.ceccherini@xxxxxxxxx


Trying to run Haiku on Xen result in a hang on start. The interrupts are never
triggered, it seems.
Haiku uses the CH0 PIT timer in mode0 for the scheduler. Changing the haiku pit
code to use mode1 which is (almost) functionally equivalent results in a
working system.
Haiku can also use the LAPIC, and this also results in a non-working system,
but this should be a different bug.
ISO images available on request.

Haiku works correctly on most real iron, and on many virtualization systems
(VMWare, VirtualBox, QEMU, etc.).

Here is the link to the haiku bug tracker where the bug is... well, tracked.
http://dev.haiku-os.org/ticket/4500
and 
http://dev.haiku-os.org/ticket/4574


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