[Bug 195160] New: ia64 cpu_halt() reboots system instead of halting

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195160

            Bug ID: 195160
           Summary: ia64 cpu_halt() reboots system instead of halting
           Product: Base System
           Version: 10.1-RELEASE
          Hardware: ia64
                OS: Any
            Status: Needs Triage
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: bruce.cran at gmail.com

The cpu_halt() function is apparently supposed to stop the CPU, for example
when a panic occurs - the x64 version is implemented via an infinite loop
running the hlt instruction.

On ia64 the implementation instead calls efi_reset_system()
(http://fxr.watson.org/fxr/source/ia64/ia64/machdep.c?v=FREEBSD10;im=bigexcerpts#L402),
which does a warm reboot and is probably not the expected behavior.

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