linux-kernel - Re: [PATCH v2 1/3] kconfig: add dependencies of POWER

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Message-ID: <2841ec8c-f07b-307e-de03-6e8a4dd88775@linaro.org>
Date:   Mon, 4 Sep 2023 21:08:45 +0200
From:   Philippe Mathieu-Daudé <philmd@...aro.org>
To:     Yuan Tan <tanyuan@...ylab.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "tsbogend@...ha.franken.de" <tsbogend@...ha.franken.de>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>
Cc:     "linux@...ssschuh.net" <linux@...ssschuh.net>,
        "w@....eu" <w@....eu>, "falcon@...ylab.org" <falcon@...ylab.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v2 1/3] kconfig: add dependencies of POWER_RESET for mips
 malta

On 4/9/23 19:40, Yuan Tan wrote:
> 
> On 9/4/2023 6:58 PM, Christophe Leroy wrote:
>>
>> Le 04/09/2023 à 12:51, Philippe Mathieu-Daudé a écrit :
>>> On 4/9/23 11:24, Yuan Tan wrote:
>>>> Hi,
>>>>
>>>> On 9/4/2023 3:40 PM, Philippe Mathieu-Daudé wrote:
>>>>> Hi,
>>>>>
>>>>> On 1/9/23 04:42, Yuan Tan wrote:
>>>>>> MIPS Malta's power off depends on PCI, PCI_QUIRKS, and
>>>>>> POWER_RESET_PIIX4_POWEROFF to work. Enable them when POWER_RESET 
>>>>>> is set
>>>>>> for convenience.
>>>>>>
>>>>>> Suggested-by: Zhangjin Wu <falcon@...ylab.org>
>>>>>> Signed-off-by: Yuan Tan <tanyuan@...ylab.org>
>>>>>> ---
>>>>>>    arch/mips/Kconfig | 3 +++
>>>>>>    1 file changed, 3 insertions(+)
>>>>>>
>>>>>> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
>>>>>> index bc8421859006..13bacbd05125 100644
>>>>>> --- a/arch/mips/Kconfig
>>>>>> +++ b/arch/mips/Kconfig
>>>>>> @@ -547,6 +547,9 @@ config MIPS_MALTA
>>>>>>        select MIPS_L1_CACHE_SHIFT_6
>>>>>>        select MIPS_MSC
>>>>>>        select PCI_GT64XXX_PCI0
>>>>>> +    select PCI if POWER_RESET
>>>>>> +    select PCI_QUIRKS if POWER_RESET
>>>>>> +    select POWER_RESET_PIIX4_POWEROFF if POWER_RESET
>>>>>>        select SMP_UP if SMP
>>>>>>        select SWAP_IO_SPACE
>>>>>>        select SYS_HAS_CPU_MIPS32_R1
>>>>> Shouldn't we also update the _defconfig files?
>>>>>
>>>> Sorry, in my last email, I forgot to reply to all. So I am now
>>>> resending this email.
>>>>
>>>> In malta_defconfig, PCI and POWER_RESET_PIIX4_POWEROFF have already
>>>> been set and PCI_QUIRKS is also selected by FSL_PCI [=n].
>>>>
>>>> So shutdown and reboot with malta_defconfig is working and there is no
>>>> need to update the malta_defconfig 🙂
>>> Since the dependency is now enforced by Kconfig, the defconfig can
>>> be simplified:
>>>
>>> --- a/arch/mips/configs/malta_defconfig
>>> +++ b/arch/mips/configs/malta_defconfig
>>> @@ -306,3 +306,2 @@ CONFIG_SERIAL_8250_CONSOLE=y
>>>    CONFIG_POWER_RESET=y
>>> -CONFIG_POWER_RESET_PIIX4_POWEROFF=y
>>>    CONFIG_POWER_RESET_SYSCON=y
>>>
>>> But maybe we don't care, I don't know.
>> I understand from what you say that you update malta_defconfig manually ?
>>
>> defconfigs shouldn't be updated manually.
>>
>> Once you have the new .config you should use "make savedefconfig" then
>> replace your file by the newly generated defconfig file.
>>
>> Christophe
> 
> To do so, I just unset CONFIG_POWER_RESET and set it again in 
> menuconfig, then "make savedefconfig". The POWER_RESET part is simplified.
> 
>   CONFIG_POWER_RESET=y
> -CONFIG_POWER_RESET_PIIX4_POWEROFF=y
> -CONFIG_POWER_RESET_SYSCON=y
> 
>   However, I found that there's other changes in this new 
> malta_defconfig, for example
> 
> CONFIG_NLS_KOI8_U=m CONFIG_CRYPTO_CRYPTD=m -CONFIG_CRYPTO_LRW=m 
> -CONFIG_CRYPTO_PCBC=m -CONFIG_CRYPTO_HMAC=y -CONFIG_CRYPTO_XCBC=m 
> -CONFIG_CRYPTO_MD4=m -CONFIG_CRYPTO_SHA512=m -CONFIG_CRYPTO_WP512=m 
> -CONFIG_CRYPTO_ANUBIS=m CONFIG_CRYPTO_BLOWFISH=m CONFIG_CRYPTO_CAMELLIA=m
> 
> Should I import all these changes in a commit? Or only POWER_RESET part.

I'd first update the defconfigs with mainline (as a cleanup)
then apply your series on top, re-running 'make savedefconfig'
you should get only the changes relevant to your work.