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Re: [Qemu-ppc] [PATCH RFC] spapr: ignore interrupts during reset state


From: Cédric Le Goater
Subject: Re: [Qemu-ppc] [PATCH RFC] spapr: ignore interrupts during reset state
Date: Thu, 13 Jul 2017 12:13:23 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

On 07/13/2017 11:10 AM, Nikunj A Dadhania wrote:
> Cédric Le Goater <address@hidden> writes:
> 
>> On 07/13/2017 09:55 AM, Nikunj A Dadhania wrote:
>>> Cédric Le Goater <address@hidden> writes:
>>>
>>>>>> How about the following, we do not report work until MSR_EE is disabled:
>>>>>
>>>>> With this fix, I could test the XIVE<->XICS transitions at reboot 
>>>>> under TCG. However, the second boot is very slow for some reason. 
>>>>
>>>> hmm, I am not sure this is related but I just got : 
>>>
>>> Havent seen in my setup after around 10 reboot cycles, I was using 2
>>> cores pseries setup. Lets give it some more testing. When did this
>>> happen, during boot ?
>>
>> yes. 
>>
>> I could not reproduce either :/ but I am keeping the patch. qemu runs
>> with :
>>
>> -m 2G -M pseries -accel tcg,thread=multi -cpu POWER9 -smp cores=4,maxcpus=8 
>> -realtime mlock=off -kernel ./vmlinux-4.12.0+ -initrd ./initrd.img-4.12.0+ 
>> -append 'console=hvc0 dyndbg="file arch/powerpc/sysdev/xive/* +p"' 
>> -nographic -nodefaults -serial mon:stdio -snapshot  -d guest_errors,unimp 
>> -no-shutdown
>>
> 
> With 4 cores I am seeing hangs occasionally, although I havent seen a
> crash. But seems to be similar problem that you had seen.

The results are good with 4 and 8 cores and so you can add my Tested-by:

Cheers,

C. 




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