Re: [PATCH 2/5] KVM: New guest debug interface

[Jan Kiszka <jan.kiszka@siemens.com>]

Avi Kivity wrote:
> Jan Kiszka wrote:
>>>> Note that both SVM and VTX are supported, but only the latter was
>>>> tested
>>>> yet. Based on the experience with all those VTX corner case, I would be
>>>> fairly surprised if SVM will work out of the box.
>>>>
>>>>         
>>> I'd like svm to work before applying.
>>>     
>>
>> To validate the design?
>>
>>   
> 
> To make sure it doesn't oops, and to make sure it works.
> 
>> I will see if I can organize an SVM box, but I can't promise when I'll
>> be able to do the testing. Anyone willing to contribute time on this
>> would be warmly welcome!
>>
>>   
> 
> I happen to have an svm box.  How do you test this? play with gdb inside
> and outside the guest?
> 
> You could also try qemu's svm emulation, but it may be a little slow,
> and probably hasn't been well tested in these areas.

FYI: I just passed the kgdbts test with some Linux guest on an Opteron
2216. Also using hbreak with gdb inside the guest appears to work. There
are just a few to-be-analyzed guest lockups/kernel panics that may
relate to the fact that the kernels were build for Intel CPUs. On the
other hand, it would be far too simple if it worked already - compared
to the pain I went through with VMX...

Jan

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