linux-kernel - Re: [PATCH v1] powerpc: Add PVN support for HeXin C2000 processor

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Message-ID: <F19DC40ACB796694+78dfb71e-a2db-473d-a9fc-fa35c5e61a27@shingroup.cn>
Date:   Fri, 24 Nov 2023 16:39:39 +0800
From:   Zhao Ke 赵 可 <ke.zhao@...ngroup.cn>
To:     Michael Ellerman <mpe@...erman.id.au>, gregkh@...uxfoundation.org
Cc:     npiggin@...il.com, christophe.leroy@...roup.eu,
        fbarrat@...ux.ibm.com, ajd@...ux.ibm.com, arnd@...db.de,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, shenghui.qu@...ngroup.cn,
        luming.yu@...ngroup.cn, dawei.li@...ngroup.cn
Subject: Re: [PATCH v1] powerpc: Add PVN support for HeXin C2000 processor

Hi Michael and Greg,

On 2023/11/23 19:02, Michael Ellerman wrote:
> Greg KH <gregkh@...uxfoundation.org> writes:
>> On Thu, Nov 23, 2023 at 05:36:11PM +0800, Zhao Ke wrote:
>>> HeXin Tech Co. has applied for a new PVN from the OpenPower Community
>>> for its new processor C2000. The OpenPower has assigned a new PVN
>>> and this newly assigned PVN is 0x0066, add pvr register related
>>> support for this PVN.
>>>
>>> Signed-off-by: Zhao Ke <ke.zhao@...ngroup.cn>
>>> Link: https://discuss.openpower.foundation/t/how-to-get-a-new-pvr-for-processors-follow-power-isa/477/10
>>> ---
>>> 	v0 -> v1:
>>> 	- Fix .cpu_name with the correct description
>>> ---
>>> ---
>>>   arch/powerpc/include/asm/reg.h            |  1 +
>>>   arch/powerpc/kernel/cpu_specs_book3s_64.h | 15 +++++++++++++++
>>>   arch/powerpc/kvm/book3s_pr.c              |  1 +
>>>   arch/powerpc/mm/book3s64/pkeys.c          |  3 ++-
>>>   arch/powerpc/platforms/powernv/subcore.c  |  3 ++-
>>>   drivers/misc/cxl/cxl.h                    |  3 ++-
>>>   6 files changed, 23 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
>>> index 4ae4ab9090a2..7fd09f25452d 100644
>>> --- a/arch/powerpc/include/asm/reg.h
>>> +++ b/arch/powerpc/include/asm/reg.h
>>> @@ -1361,6 +1361,7 @@
>>>   #define PVR_POWER8E	0x004B
>>>   #define PVR_POWER8NVL	0x004C
>>>   #define PVR_POWER8	0x004D
>>> +#define PVR_HX_C2000	0x0066
>>>   #define PVR_POWER9	0x004E
>>>   #define PVR_POWER10	0x0080
>>>   #define PVR_BE		0x0070
>> Why is this not in sorted order?
> It's semantically sorted :D
> ie. HX_C2000 is most similar to POWER8, but is newer than it.
Yes. This is what I mean. If you prefer to sort in another order, please 
tell me and I will update this.
>
> PVR_BE is out of place, I'll fix that.
>
> cheers
>