[Qemu-devel] Re: qemu compiling error on ppc64: kvm.c:81: error: 'struct kvm_sregs' has no member named 'pvr'

[Dushyant Bansal <cs5070214@cse.iitd.ac.in>]

On Wednesday 16 February 2011 02:39 PM, Avi Kivity wrote:
> On 02/15/2011 05:59 PM, Dushyant Bansal wrote:
>>>> 2. How to configure makefiles to get output of printk statements 
>>>> inside kvm/arch/powerpc/kvm/trace.h
>>> Better don't make them printks - just use the tracing framework. I'd 
>>> write up a small howto here myself, but I'm pretty much on the jump 
>>> to my plane for vacation. Avi, could you please guide him a bit on 
>>> how to get data out of tracepoints?
>>    Thanks for the quick reply :)
>> I have added some more trace parameters in the tracing framework and 
>> currently, it is working fine.
>> 1. Add new field in "struct kvm_vcpu_stat" (kvm_host.h)
>> 2. Add corresponding entry in "struct kvm_stats_debugfs_item 
>> debugfs_entries[]" (book3s.c)
>> 3. Increment or Decrement that field where ever necessary.
>
> Those aren't tracepoints; they're deprecated debug statistics.
>
> For tracepoints, see
>
>   include/trace/events/kvm.h (general kvm tracepoints)
>   arch/powerpc/kvm/trace.h (ppc specific tracepoints)
>   arch/powerpc/kvm/book3s_mmu_hpte.c (examples of use, look for 
> trace_kvm_*)
>   Documentation/trace/tracepoints.txt (documentation, likely outdated)
>
Thanks a lot for the information.

Dushyant