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From: Bruce Cran <bruce@cran.org.uk>
To: edk2-devel@lists.01.org
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Date: Mon, 17 Oct 2016 18:06:49 -0600
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Subject: OvmfPkg: hang in SetInterruptState with git 245cda6641ade1f1013c2d5c9c838f2706636828
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I've just built both OVMF _and_ Qemu from the latest git sources, so I 
don't know which is at fault - but I'm seeing a hang in:

#0  0x000000007f9dc030 in SetInterruptState (InterruptState=104 'h')
     at /home/bcran/workspace/edk2/MdePkg/Library/BaseLib/Cpu.c:60

It's at line 60 when it calls EnableInterrupts().

The entire backtrace is:

#0  0x000000007f9dc030 in SetInterruptState (InterruptState=104 'h')
     at /home/bcran/workspace/edk2/MdePkg/Library/BaseLib/Cpu.c:60
#1  0x000000007f9d6c57 in UpdateIdtTable (IdtTable=0xd, 
TemplateMap=0x7fadd478, ExceptionHandlerData=0x7f9e2460)
     at 
/home/bcran/workspace/edk2/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c:146
#2  0x000000007f9d5ff0 in InitializeCpuInterruptHandlers (VectorInfo=0xd)
     at 
/home/bcran/workspace/edk2/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c:111
#3  0x000000007f9d65fd in HasErrorCode ()
#4  0x000000000000000d in ?? ()
#5  0x000000007fadd478 in ?? ()
#6  0x000000007fa7b748 in ?? ()
#7  0x0000000000000012 in ?? ()
#8  0x000000007fadd4a0 in ?? ()
#9  0x0000000000000000 in ?? ()


I _have_ tried going back to older revisions of qemu so I'm wondering if 
this could be a problem introduced by OVMF?

-- 
Bruce