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[Xen-devel] [PATCH][SVM] fix guest hang

Hi Keir!

Attached patch fixes a boot hang we have seen with SLES 9.3 and FreeBSD HVM 
guests. Both are 32bit guests and run with a 64bit hypervisor.

The patch does the following:
1) Cache current vcpu in svm_vmexit_do_hlt
2) Check for interrupt shadow in svm_vmexit_do_hlt and handle it like a
    pending interrupt

The boot hang happens when the hlt is intercepted and the interrupt shadow
field in vmcb is set, then the guest waits forever for the next timer 

Change 1) is a cleanup, 2) is the fix

Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>

AMD Saxony, Dresden, Germany
Operating System Research Center
Legal Information:
AMD Saxony Limited Liability Company & Co. KG
Sitz (Geschäftsanschrift):
   Wilschdorfer Landstr. 101, 01109 Dresden, Deutschland
Registergericht Dresden: HRA 4896
vertretungsberechtigter Komplementär:
   AMD Saxony LLC (Sitz Wilmington, Delaware, USA)
Geschäftsführer der AMD Saxony LLC:
   Dr. Hans-R. Deppe, Thomas McCoy

Attachment: xen_svm.diff
Description: Text document

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