Re: [PATCH v2 2/3] accel/tcg: split tcg_start_vcpu_thread

[Claudio Fontana <cfontana@suse.de>]

On 10/15/20 2:33 PM, Claudio Fontana wrote:
> On 10/14/20 10:08 PM, Richard Henderson wrote:
>> On 10/14/20 12:23 PM, Claudio Fontana wrote:
>>> +++ b/accel/tcg/tcg-cpus-mttcg.h
>>> @@ -10,14 +10,4 @@
>>>  #ifndef TCG_CPUS_MTTCG_H
>>>  #define TCG_CPUS_MTTCG_H
>>>  
>>> -/*
>>> - * Multi-threaded TCG
>>> - *
>>> - * In the multi-threaded case each vCPU has its own thread. The TLS
>>> - * variable current_cpu can be used deep in the code to find the
>>> - * current CPUState for a given thread.
>>> - */
>>> -
>>> -void *tcg_cpu_thread_fn(void *arg);
>>> -
>>>  #endif /* TCG_CPUS_MTTCG_H */
>>
>> Hum.  Do we really need to create these headers in the previous patch?  Because
>> now we have an empty one.
>>
>> Why not just put all of tcg-cpus-*.h into tcg-cpus.h?
>>
>> Otherwise this looks ok.
>>
>>
>> r~
>>
> 
> There are some symbols required between -icount, -rr, and -mttcg, and in particular in the -mttcg case, this requirement goes away after start_vcpu is also refactored.
> 
> Will take a look again, at the very least the mttcg.h should be removed completely.
> 
> Ciao,
> 
> Claudio
> 

To be more precise, 

tcg-cpus-icount.h ends up with functions that icount provides (to -rr) to be able to consider icount in the part of the code that is mostly rr.

tcg-cpus-rr.h contains the functions that "rr" provides (to -icount), since icount just reuses those.

Ciao,

Claudio