Re: [Qemu-devel] [PATCH 1/2] PPC: Add dump_mmu() for 6xx

[Fabien Chouteau <chouteau@adacore.com>]

On 06/20/2013 01:16 PM, Alexander Graf wrote:
> 
> On 18.06.2013, at 18:04, Fabien Chouteau wrote:
> 
>> On 06/18/2013 05:31 PM, Alexander Graf wrote:
>>>> +    for (type = 0; type < 2; type++)
>>>
>>> You need braces on these. Please run your patch through checkpatch.pl :).
>>
>> I did ;)
>>
>> -> ./scripts/checkpatch.pl 0001-PPC-Add-dump_mmu-for-6xx.patch
>> total: 0 errors, 0 warnings, 51 lines checked
>>
>> 0001-PPC-Add-dump_mmu-for-6xx.patch has no obvious style problems and is ready for submission.
> 
> Meh - broken script :). According to the CODING_STYLE convention all of the above need to be cluttered with braces ;).

Will do.

>>>> +        for (way = 0; way < env->nb_ways; way++)
>>>> +            for (entry = env->nb_tlb * type + env->tlb_per_way * way;
>>>> +                 entry < (env->nb_tlb * type + env->tlb_per_way * (way + 1));
>>>> +                 entry++) {
>>>> +
>>>> +                tlb = &env->tlb.tlb6[entry];
>>>> +                cpu_fprintf(f, "TLB %02d/%02d %s way:%d %s ["
>>>> +                            TARGET_FMT_lx " " TARGET_FMT_lx "]\n",
>>>> +                            entry % env->nb_tlb, env->nb_tlb,
>>>> +                            type ? "code" : "data", way,
>>>> +                            pte_is_valid(tlb->pte0) ? "valid" : "inval",
>>>> +                            tlb->EPN, tlb->EPN + TARGET_PAGE_SIZE);
>>>> +            }
>>>
>>> I thought 6xx and 74xx also support HTAB and SRs? Shouldn't we dump those as well?
>>>
>>
>> I don't know what that is, can you send me an example of what the printf line should be?
> 
> SRs are similar to the SLB that book3s_64 print out. Just that there are a fixed smaller number of them (16). Basically you'd dump the env->sr array, similar to how the debug functions in get_segment_6xx_tlb() dump it.
> 
> For the HTAB I think SDR1 should be enough, so you don't need to do too much here. If you like, you can just dump the decoded fields env->htab_base and env->htab_mask. Dumping the whole HTAB would just explode the output.
> 
> However, you also should definitely dump all (valid) BATs. Check out get_bat_6xx_tlb() for debug code that dumps BATs.
> 

Ok I'll have a look at that, and BATs should definitely be printed out.




-- 
Fabien Chouteau